| Title | Methodology for Determining Compaction Temperatures for Modified Asphalt Binders |
|---|---|
| Record ID | 81148 |
| Personal Name Creator |
Stuart, Kevin |
| Corporate Creator | United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development |
| Corporate Contributor |
United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center |
| Publisher | U.S. Department of Transportation. Federal Highway Administration, Research, Development, and Technology. Turner-Fairbank Highway Research Center |
| Publication Date | 19990600 |
| Language | English |
| Abstract | The equiviscous principle, which is based on the viscosities of an asphalt binder, determines the compaction temperature to be used during asphalt mixture design. When this principle is used, theoretically, all asphalt binders should provide the same optimum asphalt binder content at a 4-percent design air-void level when all other variables, such as compaction effort and aggregate gradation, are held constant. The compaction temperature determined by this principle is also used by asphalt paving contractors as an indicator of how workable a mixture should be during construction. The equiviscous principle was developed using unmodified asphalt binders. For some polymer-modified asphalt binders, the equiviscous principle gives a compaction temperature that is significantly higher than what is needed. Excessively high temperatures may damage the asphalt binder, generate fumes, cause asphalt binder draindown, and may lead to a low asphalt binder content in some mixtures. The objective of this study was to find an asphalt binder or mastic property that can provide appropriate compaction temperatures for use during asphalt mixture design. The data collected in this study strongly suggest that there is not a single viscosity range that can be used for all asphalt binders. It is recommended that the current standardized asphalt binder viscosity range be used for unmodified asphalt binders. For polymer-modified asphalt binders, this study recommends a different viscosity range. |
| Public Note | The original format of this document was an active HTML page(s). The Federal Highway Administration converted the HTML page(s) into an Adobe Acrobat PDF file to preserve and support reuse of the information it contained. The intellectual content of this PDF is an authentic capture of the original HTML file. Hyperlinks and other functions of the HTML webpage may have been lost, and this version of the content may not fully work with screen reading software. |
| Rosap ID | dot:56412 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/56412 |
| TRT Terms | Air voids; Bituminous binders; Compaction; Gyratory testing machines; Polymer asphalt; Temperature; Viscosity; Materials; Highways |
| Geographical Coverage |
United States |
| TRIS Online Accession No |
942506 |
| Report Number | FHWA-RD-02-016 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/81000/81100/81148/FHWA-RD-02-016.pdf |
| Format | |
| Database | NTL Digital Repository |