橡胶粉改性沥青混合料路用性能试验研究

采用湿法和干法2种工艺制备橡胶粉改性沥青混合料，对比分析基质沥青混合料、湿法工艺ARAC-13沥青混合料、干法工艺ARAC-13沥青混合料3种沥青混合料的高温稳定性、水稳定性及低温抗裂性能。研究结果表明：随着水泥替代矿粉比例增加，沥青混合料的路用性能先提高，后降低；橡胶粉改性沥青混合料水稳定性优于基质沥青混合料；ARAC-13W沥青混合料低温抗裂性能优于ARAC-13D沥青混合料性能；40目橡胶粉掺量为21％、水泥替代矿粉的比例为60％时，水泥橡胶粉复合改性沥青混合料路用性能最佳。

Experimental Research on Road Performance of Rubber Powder Modified Asphalt Mixtures

This paper adopts two processes, i.e. wet method and dry method to prepare rubber powder modified asphalt mixtures, and comparatively analyzes high-temperature stability, water stability and low- temperature anti- cracking ability of three asphalt mixtures, i. e. matrix asphalt mixture, ARAC- 13 asphalt mixture with wet process and ARAC-13 asphalt mixture with dry process. The result of research shows that the road performance is improved first and then reduced with increase cement proportion in stead of mineral powder; the water stability of rubber powder modified asphalt mixture is superior to matrix asphalt mixture; the low-temperature anti-cracking ability of ARAC-13W asphalt mixture is superior to ARAC-13D asphalt mixture; when dosage of 40-mesh rubber powder is 21% and proportion of cement in stead of mineral powder is 60%, the road performance of cement- rubber powder compound modified asphalt mixture is optimal.