【摘要】 为详细探究温拌沥青混合料的水稳定性能及其改善措施,采用掺量为3%的Sasobit改性沥青拌制AC-13C型沥青混合料,以4种不同的击实温度成型马歇尔试件,测定各项指标,确定了最佳的击实温度,对普通沥青混合料以及未掺加抗剥落剂、掺加某液体抗剥落剂和掺加消石灰的Sasobit沥青混合料,采用常规马歇尔残留稳定度试验、冻融劈裂试验及汉堡车辙试验进行水稳定性能测试与对比分析.试验结果表明:Sasobit沥青混合料的最佳击实温度为125℃左右;Sasobit沥青混合料的长期水稳定性能明显低于普通沥青混合料;掺加液体抗剥落剂或消石灰均可以大幅提高Sasobit沥青混合料的水稳定性能;掺加消石灰是提高和改善Sasobit沥青混合料水稳定性能的最佳措施.更多还原

【Abstract】 In order to investigate water stability and improved measure of warm mixture asphalt,AC-13C asphalt mixtures were prepared with 3% Sasobit~ content and the optimal compaction temperature was determined according to test results of specimens formed at 4 different compaction temperatures by Marshall method.The general water stability tests and Hamburg wheel-tracking device were used to test the water stability of 4 kinds of asphalt mixtures,which were ordinary asphalt mixture,Sasobit~ asphalt mixture without adding any anti-stripping agent,Sasobit~ asphalt mixture adding liquid anti-stripping agent and Sasobit~ asphalt mixture adding hydrated lime.Test results show that the optimal compaction temperature is about 125 ℃;and compared with ordinary asphalt mixture,the long-term water stability of Sasobit~ asphalt mixture is obviously poor caused by the lower compaction temperature;the addition of either liquid anti-stripping agent or hydrated lime improves the water stability to a great extent;comparatively speaking,addition of hydrated lime is the optimum measure to improve the water stability of Sasobit~ warm mixture asphalt.更多还原