Thiopave改性沥青混凝土综合试验研究

采用具有温拌效果的新型沥青混凝土改性剂Thiopave,进行室内材料性能试验以及现场试验路段测试,对比分析了Thiopave改性沥青混凝土的各项性能参数.结果表明:当Thiopave改性剂的掺量增加时,改性沥青复数剪切模量和车辙因子均增加,温度敏感性、高温稳定性能均有增强;综合多项性能及成本考虑,Thiopave改性剂掺量为30%(质量分数)左右时相对较优;Thiopave改性剂能改善沥青混凝土的高温性能及抗水损害性能;西南山区典型高速公路试验路段运营5a以来路用性能良好,验证了Thiopave改性沥青混合料的综合性能.

Research on Experimental Test of Thiopave Modified Asphalt Concrete

Thiopave is a new kind of asphalt concrete modifier with warm mixing effect. Its employment has been gradually popularized and applied to the highways of the southwestern mountainous area. However, there is a lack of systematic experimental data to verify its modification effectiveness. A series of laboratory and field tests were conducted to analyze and compare the overall performance parameters of Thiopave modified asphalt concrete. According to the laboratory test results, with increasing content of Thiopave modifier, the complex shear modulus and rutting factor of the modified asphalt are increased, and the temperature sensitivity and the high temperature stability are also enhanced. All in all, considering a number of performance parameters and the cost of the modified asphalt concrete, 30%(by mass) of Thiopave would be a relatively superior content. Moreover, Thiopave could improve the high temperature performance and water damage resistance of the asphalt concrete. Based on the field study of a typical highway test section in a southwestern mountainous area, the overall performance of Thiopave modified asphalt concrete has demonstrated to be satisfactory in the past five years, and the comprehensive performance of Thiopave modified asphalt mixture is verified.