[ { "key": "BME3SIN2", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/BME3SIN2", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/BME3SIN2", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Shenoy", "parsedDate": "2002", "numChildren": 0 }, "data": { "key": "BME3SIN2", "version": 13, "itemType": "journalArticle", "title": "Estimating the unrecovered strain during a creep recovery test from the material's volumetric-flow rate", "creators": [ { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" } ], "abstractNote": "The ineffectiveness of the Superpave specification parameter | G * |/sind, in capturing the high temperature performance of paving asphalts, especially some polymer-modified ones, has led researchers to seek other possible parameters that may relate to rutting resistance better. Some researchers suggested a repeated creep and recovery test as a means to obtain a new rutting parameter, while other researchers suggested a refinement to the existing Superpave specification parameter. A new parameter defined as | G * |/(1 - (1/tand sind )) was previously derived from basic principles and proposed as a refined Superpave specification parameter for future use. This new parameter was shown to essentially give the same information as that obtained through a repeated creep and recovery test. The present work demonstrates a simpler method to obtain the unrecovered strain during a repeated creep and recovery test and uses the material's volumetric-flow rate (MVR) to get this information. While the repeated creep and recovery test as well as the | G * |/(1 - (1/tand sind )) parameter are obtained from the Dynamic Shear Rheometer, the MVR is obtained from a simple Flow Measurement Device (FMD). The FMD is a relatively inexpensive portable piece of equipment with low operational costs, and, through minimal training, the MVR data can be generated with a low level of variability. Thus, the proposed method of estimating the unrecovered strain during a repeated creep and recovery test from the MVR is greatly advantageous.", "publicationTitle": "International Journal of Pavement Engineering", "publisher": "", "place": "", "date": "2002", "volume": "3", "issue": "1", "section": "", "partNumber": "", "partTitle": "", "pages": "29-34", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1080/10298430290029902", "citationKey": "", "url": "http://www.tandfonline.com/doi/abs/10.1080/10298430290029902", "accessDate": "2014-10-17T16:00:48Z", "PMID": "", "PMCID": "", "ISSN": "1029-8436", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "creep recovery" }, { "tag": "dynamic shear rheometer" }, { "tag": "material's volumetric-flow rate" }, { "tag": "polymer-modified asphalts" }, { "tag": "rutting" }, { "tag": "unrecovered strain" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:20:47Z", "dateModified": "2014-11-02T13:20:47Z" } }, { "key": "PW5VQXRI", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/PW5VQXRI", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/PW5VQXRI", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Shenoy", "parsedDate": "2000", "numChildren": 0 }, "data": { "key": "PW5VQXRI", "version": 13, "itemType": "journalArticle", "title": "Validating the generality and predictive ability of unified rheological curves for unmodified paving asphalts", "creators": [ { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" } ], "abstractNote": "Fundamental rheological properties of unmodified paving asphalts have been shown to form unified curves when the material's volumetric flow rate MVR (in cm3/10 min) is used as a normalizing factor. The generality of the unification technique is shown by analyzing rheological data for a wide variety of unmodified core asphalts under different temperature conditions. Based on a broad spectrum of covered data, it is concluded that the unified curves are applicable to all unmodified paving asphalts. The predictive ability of the unified curves is then checked and found to give reasonably reliable information. Thus, using a simple parameter like MVR which is determined quite accurately on a relatively inexpensive, easy-to-use flow measurement device (FMD), all fundamental rheological parameters of unmodified paving asphalts can be calculated from the unified curves without the actual data generation of viscoelastic properties through the dynamic shear rheometer.", "publicationTitle": "Construction and Building Materials", "publisher": "", "place": "", "date": "9/2000", "volume": "14", "issue": "6-7", "section": "", "partNumber": "", "partTitle": "", "pages": "325-339", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1016/S0950-0618(00)00038-6", "citationKey": "", "url": "http://linkinghub.elsevier.com/retrieve/pii/S0950061800000386", "accessDate": "2014-10-17T15:37:40Z", "PMID": "", "PMCID": "", "ISSN": "09500618", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "MVR" }, { "tag": "dynamic shear rheometer" }, { "tag": "material's volumetric-flow rate" }, { "tag": "rheological properties" }, { "tag": "unification" }, { "tag": "unified curves" }, { "tag": "unmodified paving asphalts" }, { "tag": "viscoelastic properties" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:19:16Z", "dateModified": "2014-11-02T13:19:16Z" } }, { "key": "TFZFCFUC", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/TFZFCFUC", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/TFZFCFUC", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Qi et al.", "parsedDate": "2008", "numChildren": 0 }, "data": { "key": "TFZFCFUC", "version": 13, "itemType": "conferencePaper", "title": "Update on FHWA’s ALF tests of modified binder pavements", "creators": [ { "creatorType": "author", "firstName": "Xicheng", "lastName": "Qi" }, { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" }, { "creatorType": "author", "firstName": "Emin", "lastName": "Kutay" }, { "creatorType": "author", "firstName": "Nelson", "lastName": "Gibson" }, { "creatorType": "author", "firstName": "Jack", "lastName": "Youtcheff" }, { "creatorType": "author", "firstName": "Tom", "lastName": "Harman" } ], "abstractNote": "In the summer of 2002, under a new transportation pooled fund study TPF-5(019), 12 full-scale lanes of pavements with various modified asphalts were constructed at the Federal Highway Administration’s (FHWA) Pavement Testing Facility (PTF) in McLean, Virginia. The primary goal of the study was to use FHWA’s two Accelerated Loading Facility (ALF) machines to validate and refine changes being proposed in the Superpave binder specification to properly grade modified asphalt binders. The initial rutting test results at 64oC and strain measurements right after construction have been reported in the last IAPT conference. Since then, additional rutting tests at 74 oC and 45 oC have been conducted; fatigue testing at 19 oC has just been completed for all 12 pavement lanes. The ALF pavement performance results are linked to a comprehensive laboratory binder and mixture characterization study. This paper updates the ALF testing results from both rutting and fatigue experiments and makes comparisons between ALF and laboratory test results obtained to date. Coefficients of correlation between ALF rutting at 64 and 74 oC and Superpave as well as potential refinement of binder specification parameters will be shown with and without outliers. Similarly, the ALF fatigue data at 19 oC and Superpave as well as potential refinement fatigue parameters will also be compared to determine the coefficient of correlations and the trends obtained. Comparisons are also included between ALF and an array of lab mixture tests (flow number tests with and without confinement, push-pull tests in both stress and strain controlled modes with continuum damage mechanics analysis).", "proceedingsTitle": "", "conferenceName": "3rd International Conference on Accelerated Pavement Testing", "publisher": "", "place": "Madrid, Spain", "date": "2008", "eventPlace": "", "volume": "", "issue": "", "numberOfVolumes": "", "pages": "", "series": "", "seriesNumber": "", "DOI": "", "ISBN": "", "citationKey": "", "url": "", "accessDate": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "accelerated loading facility" }, { "tag": "asphalt mixtures" }, { "tag": "bituminous pavement" }, { "tag": "modified binders" }, { "tag": "pavement testing" }, { "tag": "rutting" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:18:51Z", "dateModified": "2014-11-02T13:18:51Z" } }, { "key": "U6FP7FGX", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/U6FP7FGX", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/U6FP7FGX", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Shenoy", "parsedDate": "2001", "numChildren": 0 }, "data": { "key": "U6FP7FGX", "version": 13, "itemType": "journalArticle", "title": "Unifying asphalt rheological data using the material's volumetric-flow rate", "creators": [ { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" } ], "abstractNote": "The material’s volumetric-flow rate MVR (in cc / 10 minutes) through a predefined die under conditions of constant temperature and stress has been used for obtaining unified curves of fundamental rheological properties such as |G*|, G\" and |G*| / Sin d versus frequency in the case of six unmodified asphalts. It has been shown that there is a theoretical basis for the unification and that the unified curves have far-reaching implications. Since MVR is so simple to determine quite accurately on a relatively inexpensive, easy-to-use flow measurement device (FMD), this parameter can be generated on paving sites or at refineries, rather than in research laboratories as is the case with fundamental rheological parameters. The MVR can then be used as an excellent indicator of the fundamental rheological parameters through the use of the unified curves.", "publicationTitle": "Journal of Materials in Civil Engineering", "publisher": "", "place": "", "date": "08/2001", "volume": "13", "issue": "4", "section": "", "partNumber": "", "partTitle": "", "pages": "260-273", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1061/(ASCE)0899-1561(2001)13:4(260)", "citationKey": "", "url": "http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290899-1561%282001%2913%3A4%28260%29", "accessDate": "2014-10-17T15:54:43Z", "PMID": "", "PMCID": "", "ISSN": "0899-1561, 1943-5533", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "MVR" }, { "tag": "asphalt" }, { "tag": "flow measurement device" }, { "tag": "material's volumetric-flow rate" }, { "tag": "rheological parameters" }, { "tag": "rheological properties" }, { "tag": "unification" }, { "tag": "unified curves" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:18:36Z", "dateModified": "2014-11-02T13:18:36Z" } }, { "key": "NGZ5XP6B", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/NGZ5XP6B", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/NGZ5XP6B", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Youtcheff et al.", "parsedDate": "2004", "numChildren": 0 }, "data": { "key": "NGZ5XP6B", "version": 13, "itemType": "conferencePaper", "title": "Understanding the performance of polymer-modified binders", "creators": [ { "creatorType": "author", "firstName": "Jack", "lastName": "Youtcheff" }, { "creatorType": "author", "firstName": "Kevin", "lastName": "Stuart" }, { "creatorType": "author", "firstName": "Ghazi", "lastName": "Al-Khateeb" }, { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" } ], "abstractNote": "An investigation of the performance of asphalt binders of identical grade but varied chemistries was conducted to determine if binder performance is captured by the Superpave binder specification. The emphasis of this effort was on polymer modification of asphalt binders and their type and mode of incorporation. A single crude was used in the production of nine modified binders that included air blowing, chemical modification (e.g., polymer grafting), and polymer blending. Both plastomeric and elastomeric polymers were evaluated in this study. The materials selected represented a divergent group of modifiers that have been placed in pavements. The initial target grade was a PG 76-28. The modified asphalts came within 1ºC of the high temperature target and 2ºC of the low temperature target. Continuous grading specification values were determined on all the materials in addition to generating rheological mastercurves, and Black Diagrams. The rut resistance of mixes containing these binders was tested using the French Pavement Rut Tester at 70ºC and Superpave Shear Tester (SST) at 50ºC and 70ºC. Fatigue testing was conducted using the Four Point Bending Beam Test at 19ºC and 500 and 1000 microstrains. Moisture sensitivity of the mixes was evaluated using the Hamburg Wheel Tracking Device at 58ºC. The relationships between binder characteristics and mix results were evaluated. The performance of these systems with respect to fatigue and moisture sensitivity is markedly different, whereas the rutting and low temperature cracking tendencies were quite similar. Validation of these results is currently being conducted on pavements incorporating a number of these modified binders at our Accelerated Loading Facility.", "proceedingsTitle": "Proceedings of the 3rd Eurasphalt & Eurobitume Congress", "conferenceName": "", "publisher": "", "place": "Vienna, Austria", "date": "2004", "eventPlace": "", "volume": "", "issue": "", "numberOfVolumes": "", "pages": "", "series": "", "seriesNumber": "", "DOI": "", "ISBN": "", "citationKey": "", "url": "", "accessDate": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "accelerated loading facility" }, { "tag": "bending beam" }, { "tag": "black diagrams" }, { "tag": "french pavement rut tester" }, { "tag": "hamburg wheel tracking device" }, { "tag": "master curves" }, { "tag": "polymer-modified binders" }, { "tag": "rheological properties" }, { "tag": "superpave shear tester" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:18:22Z", "dateModified": "2014-11-02T13:18:22Z" } }, { "key": "FNB7FEW9", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/FNB7FEW9", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/FNB7FEW9", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Nadkarni et al.", "parsedDate": "1985", "numChildren": 0 }, "data": { "key": "FNB7FEW9", "version": 13, "itemType": "journalArticle", "title": "Thermomechanical behavior of modified asphalts", "creators": [ { "creatorType": "author", "firstName": "Vikas M.", "lastName": "Nadkarni" }, { "creatorType": "author", "firstName": "Arun V.", "lastName": "Shenoy" }, { "creatorType": "author", "firstName": "Johnson", "lastName": "Mathew" } ], "abstractNote": "The thermomechanical properties of a variety of modified asphalts have been investigated by using dynamic mechanical characterization, melt viscosity determination, and softening point measurements. The asphalt modifications studied include chemical reaction of the asphalt with maleic anhydride, physical blending with styrene-butadiene-styrene rubber, air blowing, and use of inorganic fillers. The results indicate that chemical modification of asphalt flux with maleic anhydride significantly improves the softening point and the modulus at elevated temperatures, and it does so at the expense of low-temperature flexibility. On the other hand, blending with an elastomer improves the low-temperature crack resistance, but it does not enhance the high-temperature cohesive strength and flow resistance. The effective use of cashew nut shell liquid, an agro-based raw material, as a chemical modifier for asphalt to improve the low and high temperature performance has also been demonstrated", "publicationTitle": "Industrial & Engineering Chemistry Product Research and Development", "publisher": "", "place": "", "date": "09/1985", "volume": "24", "issue": "3", "section": "", "partNumber": "", "partTitle": "", "pages": "478-484", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1021/i300019a029", "citationKey": "", "url": "http://pubs.acs.org/doi/abs/10.1021/i300019a029", "accessDate": "2014-10-17T16:13:09Z", "PMID": "", "PMCID": "", "ISSN": "0196-4321, 1541-4841", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "air blowing" }, { "tag": "asphalt" }, { "tag": "cashew nut shell liquid" }, { "tag": "cohesive strength" }, { "tag": "crack resistance" }, { "tag": "dynamic mechanical characterization" }, { "tag": "elastomers" }, { "tag": "flow resistance" }, { "tag": "inorganic fillers" }, { "tag": "maleic anhydrides" }, { "tag": "melt viscosity" }, { "tag": "modified asphalts" }, { "tag": "softening point" }, { "tag": "styrene-butadiene-styrene" }, { "tag": "thermomechanical analysis" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:15:56Z", "dateModified": "2014-11-02T13:15:56Z" } }, { "key": "XN27U2CG", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/XN27U2CG", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/XN27U2CG", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Youtcheff et al.", "parsedDate": "2006", "numChildren": 0 }, "data": { "key": "XN27U2CG", "version": 13, "itemType": "conferencePaper", "title": "The evaluation of epoxy asphalt and epoxy asphalt mixtures", "creators": [ { "creatorType": "author", "firstName": "Jack", "lastName": "Youtcheff" }, { "creatorType": "author", "firstName": "Nelson", "lastName": "Gibson" }, { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" }, { "creatorType": "author", "firstName": "Ghazi", "lastName": "Al-Khateeb" } ], "abstractNote": "The paper describes the results obtained in our laboratory as part of an international project under the Organization for Economic Co-operation and Development (OECD) Road Transport Research program. The main objective is to determine whether a surface pavement with radically extended and maintenance-free service life is economically viable on high trafficked highways, when costs of road user delays due to road maintenance and rehabilitation are considered. Toward this objective, the characteristics of an epoxy asphalt binder are compared with those of a number of polymer-modified binders using the SuperpaveTM binder protocols. In addition, asphalt mixes were prepared with each binder type utilizing similar aggregates and mix designs. Tests conducted with the Superpave Shear Tester (SST), Hamburg Wheel Tracking Device (WTD), Pine Wheel Tester, Thermal Stress Restrained Specimen Test (TSRST), and Simple Performance Test (SPT) indicated that the epoxy asphalt mix is a stiffer material and exhibits excellent resistance to rutting, moisture damage, and fatigue. The Superpave binder low temperature tests were considerably higher than those from the TSRST however, results from fracture testing with the Compact Tension Test and Semicircular Bending Test qualitatively suggest the epoxy asphalt to be more resistant to low temperature thermal cracking.", "proceedingsTitle": "Proceedings of the Canadian Technical Asphalt Association Conference on Asphalt Pavements", "conferenceName": "", "publisher": "", "place": "", "date": "2006", "eventPlace": "", "volume": "", "issue": "", "numberOfVolumes": "", "pages": "", "series": "", "seriesNumber": "", "DOI": "", "ISBN": "", "citationKey": "", "url": "", "accessDate": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "epoxy asphalt" }, { "tag": "epoxy asphalt mixtures" }, { "tag": "hamburg wheel tracking device" }, { "tag": "pine wheel tester" }, { "tag": "polymer-modified asphalt" }, { "tag": "simple performance test" }, { "tag": "superpave shear tester" }, { "tag": "thermal stress restrained specimen test" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:15:35Z", "dateModified": "2014-11-02T13:15:35Z" } }, { "key": "TBDWZASX", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/TBDWZASX", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/TBDWZASX", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Shenoy and Romero", "parsedDate": "2001", "numChildren": 0 }, "data": { "key": "TBDWZASX", "version": 13, "itemType": "journalArticle", "title": "Superpave shear tester as a simple standardized measure to evaluate aggregate-asphalt mixture performance", "creators": [ { "creatorType": "author", "firstName": "A", "lastName": "Shenoy" }, { "creatorType": "author", "firstName": "P", "lastName": "Romero" } ], "abstractNote": "The present work provides a standardized method by which various mixtures can be compared and their expected performance can be assessed in a uniform manner using the Superpave shear tester. Based on the present findings, it is evident that complete mixture evaluation can be done through the frequency sweep at constant height (FSCH) data from the Superpave shear tester (SST), without the need to generate the repeated shear at constant height (RSCH) data. This would reduce the experimental time without compromising the information obtained. FSCH and RSCH data at different temperatures are generated on the SST for a number of aggregate-asphalt mixture combinations. The shear moduli versus frequency data from the FSCH at different temperatures are unified to form a single curve for each mixture so that a specification parameter TS (°C) can be determined. Each unified curve is fitted with a constitutive equation from which model parameters are evaluated. The slope B1 in the low frequency region of the unified curve, when normalized with the term (T/ TS), results in a parameter that relates to the permanent strain after 5000 cycles in RSCH at any temperature T. There is a good possibility that the slope B2 in the high frequency region of the unified curve may relate to distresses in the intermediate temperature range, such as, fatigue. If this is proven true through future research, then the Superpave shear tester could earn the distinction of being a ‘Simple Performance Tester’", "publicationTitle": "Journal of Testing and Evaluation", "publisher": "", "place": "", "date": "2001", "volume": "29", "issue": "5", "section": "", "partNumber": "", "partTitle": "", "pages": "472", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1520/JTE12277J", "citationKey": "", "url": "http://www.astm.org/doiLink.cgi?JTE12277J", "accessDate": "2014-10-17T15:55:03Z", "PMID": "", "PMCID": "", "ISSN": "00903973", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "aggregate-asphalt mixture" }, { "tag": "fatigue" }, { "tag": "simple performance tester" }, { "tag": "superpave shear tester" }, { "tag": "unified curve" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:15:15Z", "dateModified": "2014-11-02T13:15:15Z" } }, { "key": "PJIJA7G3", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/PJIJA7G3", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/PJIJA7G3", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Shenoy", "parsedDate": "2002", "numChildren": 0 }, "data": { "key": "PJIJA7G3", "version": 13, "itemType": "journalArticle", "title": "Stress relaxation can perturb and prevent physical hardening in a constrained binder at low temperatures", "creators": [ { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" } ], "abstractNote": "The physical hardening phenomenon that is observed in asphalt binders held under isothermal conditions at low temperatures is found to be absent when the asphalt binder exists in combination with the aggregates in the aggregate-asphalt mixes. A recent study on the effect of physical hardening on stress relaxation behavior of asphalt binders has provided a plausible explanation for this observation. Controlled experiments using the new Superpave Direct Tension Test (DTT) were used to demonstrate how stress relaxation overcomes physical hardening when the asphalt binder is held under restraint. In the present work, an attempt is made to provide a theoretical basis for the prevention of isothermal physical hardening due to stress relaxation in a constrained asphalt binder. The altered free volume concept is used for developing the mathematical formulation for the physical hardening, and a linear viscoelastic mechanical model is used for expressing the equations for the stress relaxation. It is shown that stress relaxation can, indeed perturb and prevent the physical hardening of asphalt binders that are held under restraint, as is the case when the binders are present in the aggregate-asphalt mixes.", "publicationTitle": "Road Materials and Pavement Design", "publisher": "", "place": "", "date": "01/2002", "volume": "3", "issue": "1", "section": "", "partNumber": "", "partTitle": "", "pages": "87-94", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1080/14680629.2002.9689916", "citationKey": "", "url": "http://www.tandfonline.com/doi/abs/10.1080/14680629.2002.9689916", "accessDate": "2014-10-17T15:57:13Z", "PMID": "", "PMCID": "", "ISSN": "1468-0629, 2164-7402", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "altered free volume" }, { "tag": "asphalt-aggregate mixes" }, { "tag": "binder" }, { "tag": "low temperatures" }, { "tag": "physical hardening" }, { "tag": "stress relaxation" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:15:03Z", "dateModified": "2014-11-02T13:15:03Z" } }, { "key": "RIJVFEAZ", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/RIJVFEAZ", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/RIJVFEAZ", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Shenoy and Romero", "parsedDate": "2002-01-01", "numChildren": 0 }, "data": { "key": "RIJVFEAZ", "version": 13, "itemType": "journalArticle", "title": "Standardized procedure for analysis of dynamic modulus | E *| data to predict asphalt pavement distresses", "creators": [ { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" }, { "creatorType": "author", "firstName": "Pedro", "lastName": "Romero" } ], "abstractNote": "A standardized procedure is presented by which various asphalt concrete mixtures can be compared and their expected performance can be assessed in a uniform manner with the simple performance test suggested by NCHRP 9-19: Superpave Support and Performance Models Management. The frequency sweep data generated from the test are available in terms of dynamic modulus | E *| versus frequency at the measurement temperature under different levels of confining stress [0, 20, 30 psi (0, 0.14, 0.21 MPa)]. The moduli versus frequency data at different temperatures are unified to form a single curve for each mixture through a normalizing parameter. The temperature at which the normalizing parameter becomes equal to 1 is designated the specification parameter T s (°C) for assessing mixture performance. Each unified curve is fitted with a constitutive equation from which model parameters are evaluated. Slope B 1 in the low-frequency region of the unified curve, when normalized with the term ( T / T s ), results in a parameter that is related to asphalt pavement distress at high temperature T. It is shown that B 1 / T s is related to rut depths measured at different WesTrack (a full-scale test track) sections and the correlation improves with increasing confining stress. There is a good possibility that slope B 2 in the high-frequency region of the unified curve may relate to distresses in the intermediate temperature range, such as fatigue cracking. A preliminary check shows this may be true, but data are too limited to draw firm conclusions.", "publicationTitle": "Transportation Research Record", "publisher": "", "place": "", "date": "2002-1-1", "volume": "1789", "issue": "1", "section": "", "partNumber": "", "partTitle": "", "pages": "173-182", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.3141/1789-19", "citationKey": "", "url": "http://trb.metapress.com/openurl.asp?genre=article&id=doi:10.3141/1789-19", "accessDate": "2014-10-17T15:57:33Z", "PMID": "", "PMCID": "", "ISSN": "0361-1981", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "asphalt pavement" }, { "tag": "dynamic modulus" }, { "tag": "fatigue cracking" }, { "tag": "rutting" }, { "tag": "unified curves" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:14:53Z", "dateModified": "2014-11-02T13:14:53Z" } }, { "key": "ZQKJSGXP", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/ZQKJSGXP", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/ZQKJSGXP", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Shenoy and Romero", "parsedDate": "2000", "numChildren": 0 }, "data": { "key": "ZQKJSGXP", "version": 13, "itemType": "journalArticle", "title": "Specification parameter for asphalt mixtures using frequency sweep data from the Superpave shear tester", "creators": [ { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" }, { "creatorType": "author", "firstName": "Pedro", "lastName": "Romero" } ], "abstractNote": "The data generated from the Superpave shear tester (SST) frequency sweep at constant height (FSCH) test is available in terms of the complex shear modulus G* versus frequency at the temperature of measurement. An attempt is made to unify the sets of curves generated at different temperatures on various mixtures. The procedure involved the use of a normalizing frequency parameter. The temperature at which the normalizing parameter becomes equal to one is suggested as a specification parameter for assessing mixture performance. This specification parameter was determined for various mixtures of known performance and found to follow performance ranking in all the studied cases.", "publicationTitle": "Road Materials and Pavement Design", "publisher": "", "place": "", "date": "01/2000", "volume": "1", "issue": "1-2", "section": "", "partNumber": "", "partTitle": "", "pages": "75-96", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1080/14680629.2000.9689885", "citationKey": "", "url": "http://www.tandfonline.com/doi/abs/10.1080/14680629.2000.9689885", "accessDate": "2014-10-17T15:52:41Z", "PMID": "", "PMCID": "", "ISSN": "1468-0629, 2164-7402", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "asphalt mixtures" }, { "tag": "specification parameter" }, { "tag": "superpave shear tester" }, { "tag": "unified curves" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:14:42Z", "dateModified": "2014-11-02T13:14:42Z" } }, { "key": "MS9PI7ZP", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/MS9PI7ZP", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/MS9PI7ZP", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Shenoy", "parsedDate": "2002", "numChildren": 0 }, "data": { "key": "MS9PI7ZP", "version": 13, "itemType": "journalArticle", "title": "Single-event cracking temperature of asphalt pavements directly from bending beam rheometer data", "creators": [ { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" } ], "abstractNote": "Asphalt pavements under low temperature conditions develop transverse cracks as a result of one or a combination of three distress mechanisms, namely, (a) single-event thermal cracking, (b) thermal fatigue, and (c) load-associated thermal cracking. The cracking temperature of asphalt pavements based on the single-event thermal cracking mechanism of asphalt binder has been suggested as a good measure of low temperature criterion for use as binder purchase specification. The determination of the single-event cracking temperature Tcr requires a comparison of the pavement thermal stress computed from the binder stiffness data generated from the Bending Beam Rheometer (BBR) with the binder strength data measured using the Direct Tension Test (DTT). Thus, two instruments, each with different sample preparation techniques, different sample sizes, and different data analysis methods, are required for the final determination of a single point signifying the cracking temperature.", "publicationTitle": "Journal of Transportation Engineering", "publisher": "", "place": "", "date": "09/2002", "volume": "128", "issue": "5", "section": "", "partNumber": "", "partTitle": "", "pages": "465-471", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1061/(ASCE)0733-947X(2002)128:5(465)", "citationKey": "", "url": "http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-947X%282002%29128%3A5%28465%29", "accessDate": "2014-10-17T15:57:54Z", "PMID": "", "PMCID": "", "ISSN": "0733-947X, 1943-5436", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "asphalt pavements" }, { "tag": "bending beam rheometer" }, { "tag": "cracking temperature" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:14:31Z", "dateModified": "2014-11-02T13:14:31Z" } }, { "key": "HQUQ4UJF", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/HQUQ4UJF", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/HQUQ4UJF", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Shenoy et al.", "parsedDate": "1982", "numChildren": 0 }, "data": { "key": "HQUQ4UJF", "version": 13, "itemType": "journalArticle", "title": "Rheograms for asphalt from single viscosity measurement", "creators": [ { "creatorType": "author", "firstName": "A. V.", "lastName": "Shenoy" }, { "creatorType": "author", "firstName": "D. R.", "lastName": "Saini" }, { "creatorType": "author", "firstName": "V. M.", "lastName": "Nadkarni" } ], "abstractNote": "Asphalt materials are used in a variety of applications such as road paving, waterproofing, roofing membranes, adhesive binders, rust proofing and water resistant coatings. There are available in a number of grades distinguished in terms of their softening point and flow resistance. The selection of the proper grade of asphalt for a particular application is governed by the desired flow behaviour. A knowledge of the complete flow curve depicting the variation of melt viscosity with shear rate at the relevant temperatures is necessary not only for proper grade selection, but also for specifying processing conditions for aggregate mixing and spraying. The rheological data are also useful in assessing end use performance. The scientific techniques for generating the rheological data involve the use of expensive, sophisticated instruments. Generation of the necessary flow data using these instruments is beyond the financial and technical means of most processors of asphalt materials. The engineering techniques involving the use of inexpensive vacuum viscometers are relatively easy, but provide a single point viscosity measurement at low shear rate. In the present work, a method is proposed for unifying the viscosity versus shear rate a data at various temperatures for a number of asphalt grades. A master curve has been generated that is independent of the grade of asphalt and the temperature of viscosity measurement. The master curve can be used to generate rheograms at desired temperatures for the asphalt grade of interest, knowing its zero-shear viscosity at that temperature.", "publicationTitle": "Rheologica Acta", "publisher": "", "place": "", "date": "5/1982", "volume": "21", "issue": "3", "section": "", "partNumber": "", "partTitle": "", "pages": "333-339", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1007/BF01515721", "citationKey": "", "url": "http://link.springer.com/10.1007/BF01515721", "accessDate": "2014-10-15T23:04:49Z", "PMID": "", "PMCID": "", "ISSN": "0035-4511, 1435-1528", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "asphalt" }, { "tag": "master curves" }, { "tag": "melt viscosity" }, { "tag": "polymer rheology" }, { "tag": "rheograms" }, { "tag": "rheological properties" }, { "tag": "rheology" }, { "tag": "shear rate" }, { "tag": "single viscosity measurement" }, { "tag": "unified curves" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:12:15Z", "dateModified": "2014-11-02T13:12:15Z" } }, { "key": "7PRCE43U", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/7PRCE43U", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/7PRCE43U", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Shenoy", "parsedDate": "2001", "numChildren": 0 }, "data": { "key": "7PRCE43U", "version": 13, "itemType": "journalArticle", "title": "Refinement of the superpave specification parameter for performance grading of asphalt", "creators": [ { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" } ], "abstractNote": "The Superpave specification parameter |G*|/sind for high temperature performance grading of paving asphalts has not been found to be adequate in rating various binders, especially some polymer-modified ones, for their rutting resistance. This has led researchers to seek other possible parameters that may better relate to rutting resistance and also to search for ways to improve the existing parameter |G*|/sind so that it is more sensitive to pavement performance. Some researchers have suggested the repeated creep and recovery test, while others have used a semi-empirical approach as a means to refine the existing Superpave specification parameter. The present work revisits the proposed refinements of the Superpave specification parameter and shows that the semi-empirical approach involving curve-fitting of experimental data is not necessary if the derivations are based on fundamental concepts. The final equations obtained through a theoretical development are verified using part of the same experimental data that were used by the earlier researchers.", "publicationTitle": "Journal of Transportation Engineering", "publisher": "", "place": "", "date": "10/2001", "volume": "127", "issue": "5", "section": "", "partNumber": "", "partTitle": "", "pages": "357-362", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1061/(ASCE)0733-947X(2001)127:5(357)", "citationKey": "", "url": "http://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-947X%282001%29127%3A5%28357%29", "accessDate": "2014-10-17T15:55:30Z", "PMID": "", "PMCID": "", "ISSN": "0733-947X, 1943-5436", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "asphalt" }, { "tag": "performance grading" }, { "tag": "rutting resistance" }, { "tag": "superpave specification parameter" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:12:03Z", "dateModified": "2014-11-02T13:12:03Z" } }, { "key": "SRGETX8R", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/SRGETX8R", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/SRGETX8R", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Bishara et al.", "parsedDate": "2003", "numChildren": 0 }, "data": { "key": "SRGETX8R", "version": 13, "itemType": "journalArticle", "title": "Rapid microwave aging of modified asphalts", "creators": [ { "creatorType": "author", "firstName": "Safwat", "lastName": "Bishara" }, { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" }, { "creatorType": "author", "firstName": "Raymond E.", "lastName": "Robertson" }, { "creatorType": "author", "firstName": "Donna", "lastName": "Mahoney" } ], "abstractNote": "A rapid method is hereby developed to simulate both short- term aging by Rolling Thin Film Oven (RTFO) and long-term aging by Pressure Aging Vessel (PAV) of modified binders. The proposed method may be used for day-to-day quality assurance leaving RTFO + PAV for referee purposes. The original modified binder (66 g) is treated for 3 hr and 10 min at 135°C in a scientific microwave unit under 3200 kPa of air pressure. Validity of the method has been established by measuring the intermediate-temperature loss modulus, G\", the low-temperature stiffness, S, and the slope m at 60 sec, the master curves for the complex modulus, | G*|, and the phase angle, d. The rheological parameters measured after microwave aging generally agree with those obtained after RTFO + PAV aging. Repeatability of the method for values of G\", S, and m, measured after six independent sample runs, proved to be within the limits calculated according to AASHTO TP5 and AASHTO TP1.", "publicationTitle": "International J. of Pavements", "publisher": "", "place": "", "date": "2003", "volume": "2", "issue": "1-2", "section": "", "partNumber": "", "partTitle": "", "pages": "53-65", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "loss modulus" }, { "tag": "microwave aging" }, { "tag": "modified asphalts" }, { "tag": "phase angle" }, { "tag": "rheological parameters" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:11:29Z", "dateModified": "2014-11-02T13:11:29Z" } }, { "key": "P5JFUWI5", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/P5JFUWI5", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/P5JFUWI5", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Shenoy", "parsedDate": "2002", "numChildren": 0 }, "data": { "key": "P5JFUWI5", "version": 13, "itemType": "journalArticle", "title": "Prediction of high temperature rheological properties of aged asphalts from the flow data of the original unaged samples", "creators": [ { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" } ], "abstractNote": "Aging of asphalt has implications during the construction of pavements and their long-term performance. The asphalt binder is known to stiffen during the mixing and lay down operations as well as during the service life of the pavement. Laboratory aging procedures have been set up to simulate the aging process in the field through the use of accelerated tests. Rheological characterization of the aged asphalts is carried out to get a measure of the extent of stiffening due to aging. However, the laboratory aging procedures along with the rheological characterization of the aged samples is a time-consuming process. Researchers have been looking for methods of shortening the time involved in generating this information. The present work outlines a procedure for generating rheological data on aged asphalts from the flow data information on the original unaged samples. The method involves the use of the unified curves for each rheological function. Each unified curve has been shown to be unique for all unmodified asphalts, whether they are in their original unaged form or Rolling Thin Film Oven Test (RTFOT) and Pressure Aging Vessel (PAV)-aged forms. Through a correlating equation for the rheological property, it is shown that estimates of the high temperature dynamic rheological properties of the aged asphalt can be obtained without actually aging the binder in the laboratory. By eliminating the laboratory aging procedures, there is a great deal of savings in time. To add to these savings, the present method relies on the material's volumetric-flow rate (MVR) that is easy, efficient and rapid to generate the necessary rheological information from the unified curves.", "publicationTitle": "Construction and Building Materials", "publisher": "", "place": "", "date": "12/2002", "volume": "16", "issue": "8", "section": "", "partNumber": "", "partTitle": "", "pages": "509-517", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1016/S0950-0618(02)00030-2", "citationKey": "", "url": "http://linkinghub.elsevier.com/retrieve/pii/S0950061802000302", "accessDate": "2014-10-17T15:58:33Z", "PMID": "", "PMCID": "", "ISSN": "09500618", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "aging" }, { "tag": "asphalt binder" }, { "tag": "material's volumetric-flow rate" }, { "tag": "rheology" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:10:24Z", "dateModified": "2014-11-02T13:10:24Z" } }, { "key": "CK7BGSW2", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/CK7BGSW2", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/CK7BGSW2", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Gibson et al.", "parsedDate": "2012", "numChildren": 0 }, "data": { "key": "CK7BGSW2", "version": 13, "itemType": "report", "title": "Performance testing for Superpave and structural validation", "creators": [ { "creatorType": "author", "firstName": "Nelson", "lastName": "Gibson" }, { "creatorType": "author", "firstName": "Xicheng", "lastName": "Qi" }, { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" }, { "creatorType": "author", "firstName": "Ghazi", "lastName": "Al-Khateeb" }, { "creatorType": "author", "firstName": "Emin M.", "lastName": "Kutay" }, { "creatorType": "author", "firstName": "Adrian", "lastName": "Andriescu" }, { "creatorType": "author", "firstName": "Kevin", "lastName": "Stuart" }, { "creatorType": "author", "firstName": "Jack", "lastName": "Youtcheff" }, { "creatorType": "author", "firstName": "Tom", "lastName": "Harman" } ], "abstractNote": "The primary objective of this full-scale accelerated pavement testing was to evaluate the performance of unmodified and polymer modified asphalt binders and to recommend improved specification tests over existing SUperior PERforming Asphalt PAVEment (Superpave®) binder performance grading methodologies. Candidate replacement tests were evaluated via their ability to discern fatigue cracking resistance and rutting.", "reportNumber": "FHWA-HRT-11--45", "reportType": "", "institution": "FHWA", "place": "McLean, VA", "date": "2012", "seriesTitle": "", "seriesNumber": "", "pages": "271", "DOI": "", "ISBN": "", "citationKey": "", "url": "", "accessDate": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "accelerated loading facility" }, { "tag": "bituminous pavement" }, { "tag": "fatigue cracking" }, { "tag": "modified binder" }, { "tag": "rutting" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:09:35Z", "dateModified": "2014-11-02T13:09:35Z" } }, { "key": "PIKQWK7G", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/PIKQWK7G", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/PIKQWK7G", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Qi et al.", "parsedDate": "2006", "numChildren": 0 }, "data": { "key": "PIKQWK7G", "version": 13, "itemType": "conferencePaper", "title": "Performance of the constructed FHWA’s ALF modified binder pavements", "creators": [ { "creatorType": "author", "firstName": "Xicheng", "lastName": "Qi" }, { "creatorType": "author", "firstName": "Ghazi", "lastName": "Al-Khateeb" }, { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" }, { "creatorType": "author", "firstName": "Terry", "lastName": "Mitchell" }, { "creatorType": "author", "firstName": "Nelson", "lastName": "Gibson" }, { "creatorType": "author", "firstName": "Jack", "lastName": "Youtcheff" }, { "creatorType": "author", "firstName": "Tom", "lastName": "Harman" } ], "abstractNote": "In the summer of 2002, twelve (12) full-scale lanes of pavements with various modified asphalts were constructed at the Federal Highway Administration’s (FHWA) Pavement Testing Facility (PTF) in Virginia. The primary goal of the study is to use FHWA’s two Accelerated Loading Facility (ALF) machines to validate and refine changes being proposed in the Superpave binder specification to properly grade modified binders. In December 2002, ALF loading began on the pavements to induce two primary modes of failure: rutting and fatigue cracking. Currently, rut testing has been completed at 64 °C on all 12 lanes. Fatigue testing at 19 °C is underway and scheduled to be complete by early 2006. The pavement performance is being compared to both binder and mixture parameters. This paper presents an overview of the pooled fund study, rutting and fatigue cracking performance and correlation analyses with the laboratory testing results obtained to date.", "proceedingsTitle": "10th International Conference on Asphalt Pavements, Pavement Performance", "conferenceName": "", "publisher": "", "place": "Quebec, Canada", "date": "2006", "eventPlace": "", "volume": "topic number: 3.2 Full-scale and accelerated pavement testing,", "issue": "", "numberOfVolumes": "", "pages": "", "series": "", "seriesNumber": "", "DOI": "", "ISBN": "", "citationKey": "", "url": "", "accessDate": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "accelerated loading facility" }, { "tag": "bituminous pavement" }, { "tag": "fatigue cracking" }, { "tag": "modified binder" }, { "tag": "rutting" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:09:22Z", "dateModified": "2014-11-02T13:09:22Z" } }, { "key": "HII9HK9I", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/HII9HK9I", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/HII9HK9I", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Shashidhar and Shenoy", "parsedDate": "2002", "numChildren": 0 }, "data": { "key": "HII9HK9I", "version": 13, "itemType": "journalArticle", "title": "On using micromechanical models to describe dynamic mechanical behavior of asphalt mastics", "creators": [ { "creatorType": "author", "firstName": "N.", "lastName": "Shashidhar" }, { "creatorType": "author", "firstName": "A.", "lastName": "Shenoy" } ], "abstractNote": "The applicability of micromechanical models in describing the dynamic mechanical behavior of asphalt mastics is explored. The complex sets of equations from the \"generalized self-consistent scheme\" (GSCS) are simplified using an order of magnitude analysis. The simplification provides a better perspective and insight into how the model operates and predicts. For asphalt mastics, it is found that the stiffness ratio is sensitive only to the Poisson's ratio of the binder and the volume fraction of the fine aggregates. The results from the model when compared with experimental data indicate that the theoretical predictions fall short of the experimental values. This is because the GSCS model in its original complex form as well as in the simplified form is unable to capture the effects of all the variables involved in the increase of the stiffness ratio of the mastics. The concepts of percolation theory are incorporated to obtain a modified form of the model. This modified model fits the experimental data of asphalt mastics well when appropriate values of two adjustable parameters, namely, the volume fraction at percolation threshold and the maximum volume fraction of the filler are used.", "publicationTitle": "Mechanics of Materials", "publisher": "", "place": "", "date": "10/2002", "volume": "34", "issue": "10", "section": "", "partNumber": "", "partTitle": "", "pages": "657-669", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1016/S0167-6636(02)00166-7", "citationKey": "", "url": "http://linkinghub.elsevier.com/retrieve/pii/S0167663602001667", "accessDate": "2014-10-17T15:58:56Z", "PMID": "", "PMCID": "", "ISSN": "01676636", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "asphalt mastics" }, { "tag": "dynamic mechanical behavior" }, { "tag": "micromechanical model" }, { "tag": "percolation theory" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:09:05Z", "dateModified": "2014-11-02T13:09:05Z" } }, { "key": "FH7NUWGX", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/FH7NUWGX", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/FH7NUWGX", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Shenoy", "parsedDate": "2008", "numChildren": 0 }, "data": { "key": "FH7NUWGX", "version": 13, "itemType": "journalArticle", "title": "Nonrecovered compliance from dynamic oscillatory test vis -à- vis nonrecovered compliance from multiple stress creep recovery test in the dynamic shear rheometer", "creators": [ { "creatorType": "author", "firstName": "A.", "lastName": "Shenoy" } ], "abstractNote": "Nonrecovered compliance is presently being viewed as the most appropriate rheological parameter for evaluating the propensity of an asphalt binder to resist permanent deformation or rutting in the pavement wheel paths. The nonrecovered compliance can be obtained in two ways using two different types of tests in the dynamic shear rheometer. One is through the dynamic oscillatory test using a frequency, time, strain or stress sweep, wherein the data generated is in terms of the complex modulus and phase angle that can be used in a proper mathematical form to obtain the nonrecovered compliance. The other is through the multiple stress creep and recovery test wherein the nonrecovered strain at each stress level after 10 cycles of creep and recovery is divided by the stress value to obtain the nonrecovered compliance. The two methods are very different in the way data gets generated and handled and, also, in the level of ease or difficulty in data generation. With two methods competing to come up with the same outcome, it is important to see a comparison of the merits and demerits of each of the methods in order to ascertain which of the two is more reliable, more fundamental, easier to use and better to implement. The purpose of this paper is to provide a one-on-one comparison between the two methods using the same set of binders and also to look at the possible benefits of one over the other.", "publicationTitle": "International Journal of Pavement Engineering", "publisher": "", "place": "", "date": "10/2008", "volume": "9", "issue": "5", "section": "", "partNumber": "", "partTitle": "", "pages": "329-341", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1080/10298430701635095", "citationKey": "", "url": "http://www.tandfonline.com/doi/abs/10.1080/10298430701635095", "accessDate": "2014-10-17T16:09:41Z", "PMID": "", "PMCID": "", "ISSN": "1029-8436, 1477-268X", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "asphalt binder" }, { "tag": "dynamic oscillatory test" }, { "tag": "dynamic shear rheometer" }, { "tag": "nonrecovered compliance" }, { "tag": "permanent deformation" }, { "tag": "rheological parameter" }, { "tag": "rheological properties" }, { "tag": "rheology" }, { "tag": "rutting" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:08:37Z", "dateModified": "2014-11-02T13:08:37Z" } }, { "key": "W464U96D", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/W464U96D", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/W464U96D", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Copeland et al.", "parsedDate": "2007-01-01", "numChildren": 0 }, "data": { "key": "W464U96D", "version": 13, "itemType": "journalArticle", "title": "Moisture sensitivity of modified asphalt binders: Factors influencing bond strength", "creators": [ { "creatorType": "author", "firstName": "Audrey", "lastName": "Copeland" }, { "creatorType": "author", "firstName": "Jack", "lastName": "Youtcheff" }, { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" } ], "abstractNote": "Bond strength is a critical parameter in evaluating a binder's ability to resist moisture-induced damage. The influence of polymer modification, moisture conditioning, and long-term aging on the bond strength of asphalt binders was measured by means of the modified pull-off test method previously developed to evaluate moisture sensitivity of asphalt binders using the pneumatic adhesion tensile testing instrument (PATTI). The pull-off test is able to distinguish between binders with the same performance grade but different chemical properties due to modification. However, the exact effect of modification on bond strength cannot be determined without consideration of the binder's physical properties. Moisture conditioning was the most influential factor on bond strength. Long-term laboratory aging increased cohesive strength of asphalt binders. However, aging combined with moisture conditioning decreased adhesive strength of binders. Comparisons of binder resistance to permanent deformation with pull-off tensile strength highlight the need for a test method that measures adhesive properties, namely, bond strength, of asphalt binder and mastics. Finally, recommendations are provided to improve the ability of the pull-off test method to determine bond strength.", "publicationTitle": "Transportation Research Record", "publisher": "", "place": "", "date": "2007-1-1", "volume": "1998", "issue": "1", "section": "", "partNumber": "", "partTitle": "", "pages": "18-28", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.3141/1998-03", "citationKey": "", "url": "http://trb.metapress.com/openurl.asp?genre=article&id=doi:10.3141/1998-03", "accessDate": "2014-10-17T16:07:35Z", "PMID": "", "PMCID": "", "ISSN": "0361-1981", "archive": "", "archiveLocation": "", "shortTitle": "Moisture Sensitivity of Modified Asphalt Binders", "language": "", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "asphalt binder" }, { "tag": "asphalt mastic" }, { "tag": "bond strength" }, { "tag": "cohesive strength" }, { "tag": "modified asphalt binders" }, { "tag": "moisture sensitivity" }, { "tag": "permanent deformation" }, { "tag": "pneumatic adhesion" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T13:06:16Z", "dateModified": "2014-11-02T13:06:16Z" } }, { "key": "6MVMBRP2", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/6MVMBRP2", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/6MVMBRP2", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Abbas et al.", "parsedDate": "2005", "numChildren": 0 }, "data": { "key": "6MVMBRP2", "version": 13, "itemType": "journalArticle", "title": "Modelling asphalt mastic stiffness using discrete element analysis and micromechanics-based models", "creators": [ { "creatorType": "author", "firstName": "Ala", "lastName": "Abbas" }, { "creatorType": "author", "firstName": "Eyad", "lastName": "Masad ∥" }, { "creatorType": "author", "firstName": "Tom", "lastName": "Papagiannakis #" }, { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy **" } ], "abstractNote": "", "publicationTitle": "International Journal of Pavement Engineering", "publisher": "", "place": "", "date": "06/2005", "volume": "6", "issue": "2", "section": "", "partNumber": "", "partTitle": "", "pages": "137-146", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1080/10298430500159040", "citationKey": "", "url": "http://www.tandfonline.com/doi/abs/10.1080/10298430500159040", "accessDate": "2014-10-17T16:11:30Z", "PMID": "", "PMCID": "", "ISSN": "1029-8436, 1477-268X", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2014-11-02T12:37:51Z", "dateModified": "2014-11-02T12:37:51Z" } }, { "key": "I7TX2C9N", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/I7TX2C9N", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/I7TX2C9N", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Shenoy", "parsedDate": "2002", "numChildren": 0 }, "data": { "key": "I7TX2C9N", "version": 13, "itemType": "journalArticle", "title": "Model-fitting the master curves of the dynamic shear rheometer data to extract a rut-controlling term for asphalt pavements", "creators": [ { "creatorType": "author", "firstName": "A", "lastName": "Shenoy" } ], "abstractNote": "The dynamic shear rheometer (DSR) is currently being used by the asphalt community for determination of the viscoelastic properties of asphalts following the recommendations of the Strategic Highway Research Program (SHRP). The Superpave specification parameter |G*|/sind was identified as the term to be used for high temperature performance grading of paving asphalts in rating the binders for their rutting resistance. However, this term was found to be inadequate in describing the rutting performance of certain binders, particularly, the polymer-modified ones. A refinement of the Superpave specification parameter for performance grading of asphalt led to the evolution of the term |G*| / (1 – (1/tandsind)). This performance-based specification (PBS) term was shown to be more sensitive to the variations in the phase angle d than the Superpave specification parameter and thus was found to describe the unrecovered strain in the binders more accurately, especially in the case of polymer-modified asphalts. The high specification temperature THS (°C) is specified as the temperature at which the term |G*| / (1 – (1/tandsind)) takes a value of 1 kPa for the original unaged binder and a value of 2.2 kPa for the RTFOT aged binder. Though this refinement of the Superpave specification parameter has led to a better discrimination between the rutting resistances of various asphalts, it is found that not all asphalts that have been performance-graded as being the same, behave identically in their rutting performance. Thus, there is a need to create a rut-controlling term that would distinguish between asphalts that are graded the same but prepared by different modification routes. Such a rut-controlling term can then be used as a performance-related specification (PRS). The present work extracts the rut-controlling term by model-fitting the master curve formed from the |G*| / (1 – (1/tandsind)) or |G*| / (sind)9 versus frequency data at various temperatures for each binder. Each master curve is fitted with a constitutive equation from which model parameters are evaluated. The slope B1 in the low frequency region of the master curve is normalized with the term (T / THS), resulting in the rut-controlling term that relates to the permanent strain after 5000 cycles in the repeated shear at constant height (RSCH) experiment on the Superpave shear tester (SST) at temperature T.", "publicationTitle": "Journal of Testing and Evaluation", "publisher": "", "place": "", "date": "2002", "volume": "30", "issue": "2", "section": "", "partNumber": "", "partTitle": "", "pages": "95-102", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1520/JTE12294J", "citationKey": "", "url": "http://www.astm.org/doiLink.cgi?JTE12294J", "accessDate": "2014-10-17T15:59:16Z", "PMID": "", "PMCID": "", "ISSN": "00903973", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "asphalt pavements" }, { "tag": "dynamic shear rheometer" }, { "tag": "master curves" }, { "tag": "model-fitting" }, { "tag": "rutting" }, { "tag": "superpave shear tester" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T12:37:37Z", "dateModified": "2014-11-02T12:37:37Z" } }, { "key": "D5EUDKP6", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/D5EUDKP6", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/D5EUDKP6", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Al-Khateeb et al.", "parsedDate": "2007", "numChildren": 0 }, "data": { "key": "D5EUDKP6", "version": 13, "itemType": "journalArticle", "title": "Mechanistic performance analyses of the FHWA's Accelerated Loading Facility pavements", "creators": [ { "creatorType": "author", "firstName": "Ghazi", "lastName": "Al-Khateeb" }, { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" }, { "creatorType": "author", "firstName": "Nelson", "lastName": "Gibson" } ], "abstractNote": "Mechanistic analyses using available pavement analysis programs-KENPAVE, WINLEA, EVERSTRS, EVERFLEX, and VESYS 5W (1-5) were conducted for the Federal Highway Administration's (FHWA's) Accelerated Loading Facility (ALF) pavements that were constructed using different asphalt binders including highly modified and unmodified ones. The analyses were divided and presented in two parts: (1) the primary response under the ALF pavements, and (2) the performance of the ALF pavements. In the present paper, the discussion is limited to the second part as the first part is available elsewhere (6). The analyses included pavement performance analysis using VESYS 5W program, performance predictions using existing rutting and fatigue models, and calibration and evaluation of these models. The mechanistic analyses showed that the VESYS-predicted HMA rut depths correlated well with the ALF-measured HMA rut depths for both the ALF 150-mm and 100-mm asphalt pavements, and that the VESYS 5W program seemed to be capable of predicting the HMA layer rutting more effectively than the pavement total (surface) rutting. It was also found that the VESYS 5W program under-predicted the ALF-measured rut depths in the primary phase (at earlier stages) of rutting, and it favorably predicted the measured values in the secondary stage of rutting.", "publicationTitle": "Asphalt Paving Technology: Association of Asphalt Paving Technologists-Proceedings of the Technical Sessions", "publisher": "", "place": "", "date": "2007", "volume": "76", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "737-770", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "EVERFLEX" }, { "tag": "EVERSTRS" }, { "tag": "KENPAVE" }, { "tag": "VESYS" }, { "tag": "WINLEA" }, { "tag": "accelerated loading facility" }, { "tag": "asphalt pavements" }, { "tag": "mechanistic studies" }, { "tag": "rut depths" }, { "tag": "rutting" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T12:36:11Z", "dateModified": "2014-11-02T12:36:11Z" } }, { "key": "JI3HHFCP", "version": 13, "library": { "type": "group", "id": 300742, "name": "ASPHALT TECHNOLOGY", "links": { "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/300742/items/JI3HHFCP", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/asphalt_technology/items/JI3HHFCP", "type": "text/html" } }, "meta": { "createdByUser": { "id": 2129275, "username": "draroonshenoy", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/draroonshenoy", "type": "text/html" } } }, "creatorSummary": "Shenoy", "parsedDate": "2000", "numChildren": 0 }, "data": { "key": "JI3HHFCP", "version": 13, "itemType": "journalArticle", "title": "Material's Volumetric-flow Rate (MVR) as a unification parameter in asphalt rheology and quality control / quality assurance tool for high temperature performance grading", "creators": [ { "creatorType": "author", "firstName": "Aroon", "lastName": "Shenoy" } ], "abstractNote": "Rheological data of unmodified and polymer-modified asphalts are conventionally obtained from dynamic mechanical characterization and expressed in terms of sets of curves showing the variation of viscoelastic properties with frequency. Using the conventional melt flow indexer, the material's volumetric-flow rate MVR (in cm3 / 10 minutes) through a predefined die under conditions of constant temperature and stress when obtained for the same asphalts, shows a direct relationship with the dynamic data. The MVR value helps in unifying the sets of dynamic data curves of |G*|, G\" and |G* |/sin d versus frequency in the case of unmodified asphalts, poly- mer-modified asphalts and asphalt mastics. The unification technique has a sound theoretical basis and the uni- fied curves have far-reaching implications. Since MVR is so simple to determine quite accurately on a relatively inexpensive, easy-to-use flow measurement device (FMD), this parameter can be generated on paving sites or at refineries, if needed, rather than in research laboratories as is the case with the fundamental rheological parameters. The MVR can then be used as an excellent indicator of the fundamental rheological parameters through the use of the unified curves. The MVR can be utilized to accurately determine the currently used high temperature performance grade specification of paving asphalt. On account of the simplicity in obtaining this specification value from the MVR, it may be routinely used for quality control / quality assurance purposes. It can also be used as a rapid product development / formulation tool. Zusammenfassung Die rheologische Daten von unmodifizierten und durch Polymere modifizierte Asphalte werden üblicherweise mittels dynamisch-mechanischer Charakterisierung erhalten und dann als Kurvenschar, welche die Änderung der viskoelastischen Eigenschaften bei verschiedenen Frequenzen zeigen, dargestellt. Für die gleichen Asphal- te kann aber auch die volumetrische Fliessrate (MVR), welche in einem konventionellen Melt Flow Indexer mit definierter Düse bei konstanter Temperatur und Schubspannung gemessen wird, mit den dynamischen Daten korreliert werden. Der MVR-Wert wird hierbei benutzt, um die frequenzabhängigen dynamischen Daten für |G*|, G\" und |G*|/sin d für modifizierte und unmodifizierte Asphalte und Asphaltharze zu normieren. Diese Normie- rungstechnik basiert auf einen theoretischen Hintergrund und die normierten Kurven haben weitreichende prak- tische Konsequenzen. Der MVR-Wert kann sehr einfach und genau mit preiswerten und einfach zu bedienen- den Flow Measurement Devices (FMD) vor Ort oder in Raffinerien bestimmt werden, anstatt in Forschungslabors durch aufwendige rheologische Versuche. Der MVR-Wert kann sodann mittels der normierten Kurven als ein hervorragender Indikator für fundamentale rheologische Parameter herangezogen werden. Zudem kann er benutzt werden um die gegenwärtig verwendete \"High Temperature Performance Grade\" Anforderungen von Strassenasphalt präzise zu bestimmen. In Anbetracht der Einfachheit, mit welcher diese Spezifikation anhand des MVR-Wertes bestimmt werden kann, könnte dieses Verfahren routinemässig zur Qualitätskontrolle und Qualitätsbürgschaft ebenso zur schnellen Produktentwicklung verwendet werden.", "publicationTitle": "Applied Rheology", "publisher": "", "place": "", "date": "2000", "volume": "10", "issue": "6", "section": "", "partNumber": "", "partTitle": "", "pages": "288-306", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.3933/ApplRheol-10-288", "citationKey": "", "url": "http://dx.doi.org/ 10.3933/ApplRheol-10-288", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "14306395", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "MVR" }, { "tag": "asphalt rheology" }, { "tag": "flow measurement device" }, { "tag": "high temperature performance grading" }, { "tag": "material's volumetric-flow rate" }, { "tag": "rheological properties" }, { "tag": "rheology" }, { "tag": "unification" }, { "tag": "unified curves" } ], "collections": [], "relations": {}, "dateAdded": "2014-11-02T12:35:53Z", "dateModified": "2014-11-02T12:35:53Z" } } ]