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Performance Evaluation of HMA Consisting of Modified Asphalt Binder.
| 题名： | Performance Evaluation of HMA Consisting of Modified Asphalt Binder. |
| 作者： | sugandh, r. zea, m. tandon, v. smit, a. prozzi, j. |
| 关键词： | modifiers, evaluation, recommendations |
| 摘要： | To achieve Strategic Highway Research Program (SHRP) specified PG grades, refineries make use of modifiers to enhance the properties of base asphalt. Even though modified binders may meet PG specifications, some perform better than others. This can be attributed to binder/hot mix asphalt (HMA) tests inability in consistently identifying the problems with the binders especially if the modifier is added to the binder. Therefore, it is necessary to identify a binder/HMA test that can consistently predict performance. The research performed for SHRP has significantly increased the understanding of HMA mix behavior among national and international highway-related agencies, which has resulted in an increase in the number of mixes available for placement. The increase in mix types makes it difficult for designers to select the appropriate mix for a given application. Therefore, it is necessary to have a HMA selection guideline. To achieve the objectives of this study, a survey was conducted to identify commonly placed mix and modifier types and logic followed in selection of mixes. Based on survey results, three mixes (Type D, CMHB-C, and PFC) were selected. In addition, the four modifier types: SBS, SBR, TR, and Elvaloy were selected and evaluated. The evaluation results and recommendations are included in this report. / NOTE: Technical rept. (Sept. 2003-July 2006). / Supplementary Notes: See also PB2007-107249. Sponsored by Texas Dept. of Transportation, Austin. Research and Technology Implementation Office. and Federal Highway Administration, Austin, TX. Texas Div. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| 报告类型： | 科技报告 |
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