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Comprehensive Laboratory and Field Study of High-Cure Crumb-Rubber Modified Asphalt Materials; Research rept. 1 Sep 94-31 Aug 00
| 题名： | Comprehensive Laboratory and Field Study of High-Cure Crumb-Rubber Modified Asphalt Materials; Research rept. 1 Sep 94-31 Aug 00 |
| 作者： | Glover, C. J.; Davison, R. R.; Bullin, J. A.; Estakhri, C. K.; Williamson, S. A. |
| 关键词： | Asphalt pavement; Tire rubbers; Superpave; Hot mixing paving mixtures |
| 摘要： | This project was a comprehensive study of methods for incorporating ground tire rubber in asphalt and of the resulting properties and potential pavement serviceability. Potential benefits include improved pavement durability through reduced rates of oxidative hardening, improved Superpave performance grade on both the high and low end grades, and utilization of a waste material. The degree of performance grade improvement depends upon the amount of rubber and the extent of the cure. In general, higher cure results in less increase in both high and low end improvement. However, higher cure also results in improved stability to storage settling and improved high-temperature (hot-mix temperature) viscosity and thus improved mix compaction in dense-graded mixes. A higher degree of curing can be achieved by higher shear and higher temperature, but also be air curing, which also can produce significant increases in the upper end performance grade. Over-curing can result in reducing significantly the benefit of rubber on performance grade, but the positive effect on reducing hardening rates remains. |
| 总页数： | 264p |
| 报告类型： | 科技报告 |
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