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利用旋转压实仪成型试件,采用改进的Superpave设计方法进行橡胶沥青抗裂层沥青混合料设计,通过浸水马歇尔试验、冻融劈裂试验、低温弯曲小梁试验、车辙试验及疲劳试验研究橡胶沥青抗裂层混合料路用性能。试验结果表明:改进的Superpave设计方法适合抗裂层沥青混合料设计;橡胶沥青抗裂层混合料具有良好的低温抗裂性能、水稳定性能及疲劳性能,但高温性能不足,可通过路面结构组合设计予以增强;疲劳寿命与应力呈指数关系,相关性较好,在应用中应优化路面组合以发挥其低应力状态下良好的疲劳性能。
The rotary compaction instrument was used to shape the test piece. The improved Superpave design method was used to design the rubber asphalt anti-cracking layer asphalt mixture. By immersion Marshall test, freeze-thaw splitting test, low temperature bending trabecular test, rutting test and fatigue test, Asphalt cracking - resistant layer road mix performance. The test results show that the improved Superpave design method is suitable for the design of anti-crack asphalt mixture. The asphalt anti-crack asphalt mixture has good low temperature crack resistance, water stability and fatigue performance, but the high temperature performance is not enough, Design to be enhanced; fatigue life and stress exponential relationship, the correlation is good, the application should optimize the pavement combination to exert its low stress state fatigue performance.