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Final Report: Selection and Evaluation of Peifomuince-Graded Asphalt Binders
for Vireinia
| 题名： | Final Report: Selection and Evaluation of Peifomuince-Graded Asphalt Binders for Vireinia |
| 作者： | B. D. Plowell |
| 关键词： | Performance-graded binder Asphalt pavement analyzer Superpave Georgia loaded-wheel tester Viscosity-graded asphalt cement |
| 摘要： | This study recommended performance-graded (PG) binders to be used in hot-mix asphalt in Virginia. Ten conventional viscosity graded asphalt cements, representing die asphalt typically available in Virginia, were graded under the PG system to develop a cross-reference with the new system. Based on the past performance of the viscosity-graded asphalt and the PG binder testing, PG 64-22 was selected as the base grade of asphalt for Virginia. Laboratory studies were performed with the Georgia loaded-wheel tester and asphalt pavement analyzer to evaluate the practice of increasing the high-temperature binder grade for heavy or slow-moving traffic. Based on the success of these studies and field trial sections, two new mix types, SM-2D and SM-2E, both 50-blow Marshall mixes using PG 70-22 and PG 76-22 binders, respectively, were developed. The lower laboratory compaction effort will increase the asphalt content for durability, and the stiffer binder will prevent rutting. A large database of field rut-depth data was developed fen* Virginia Department of Transportation surface mixes with die asphalt pavement analyzer. The data were used to estimate maximum rut-depth criteria for quality assurance testing and the evaluation of future asphalt mix designs, binders, and stabilizers. |
| 报告类型： | 科技报告 |
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