季冻区橡胶改性应力吸收层配合比设计及施工工艺研究

Study on the Mix Proportion and Construction Technology of Asphalt Rubber Modified Stress Absorbing Membrane Interlayer in the Seasonal Frozen Soil Regions

季冻区路面病害的典型特点是低温开裂,在沥青面层与基层间设置应力吸收层能有效减缓反射裂缝。根据季冻区的气候特点,从沥青种类和集料级配的选择上,对橡胶粉SBS复合改性沥青混合料进行配合比优化设计和试验路铺筑,提出适用于季冻区的应力吸收层性能和施工工艺。

One of the typical road pavement damage features in the seasonal frozen soil regions is low-temperature cracking.However,set up the stress absorbing membrane interlayer between the asphalt course and base course is one of the effective measures to slow down the reflex cracking.According to the weather characteristics in the seasonal frozen soil regions,with the different asphalts types and different mineral aggregate gradations,the Rubber-SBS compounded modified asphalt mixture proportions were studied by optimization and paved the test road with the best mix proportion and the applicable performance and construction process were suggested.