透水性沥青混合料全程水稳定性规律研究

通过室内模拟试验，以沥青混合料长期老化试验和冻融循环试验来模拟透水性沥青混合料在使用过程中的老化和水损害，采用全面搭配法，考虑变化因素为老化时间和冻融循环次数，两个变化因素分别考虑6个变化水平（即长期老化0～5d，冻融循环0～5次），以多次冻融劈裂比TSR MN，来评价透水性沥青混合料的水稳定性，得到透水性沥青混合料的全程水稳定性变化规律：随着长期老化时间的延长，其抗水损害能力先变强后减弱，在老化2d后达到峰值，4d后趋于稳定，同时混合料的抗水损害能力随着混合料水损害程度的增加不断减弱。

Study on the Law of Whole-term Water Stability of Porous Asphalt Mixture

Through the laboratory simulation test, Using Long-term aging tests and the freeze-thaw test to simulate the aging and water damage of permeable asphalt mixture in using process, Consider time and the number of freeze-thaw cycles as variables which have six changes in levels （long-term 0 - 5 d, freeze-thaw cycle 0 - 5 times） , and then application with a comprehensive method, using atio of repeatedly times freeze-thaw splitting which named TSRMN to evaluation the water stability of permeable asphalt mixture. We get the law of the whole-time water stability of permeable asphalt mix- ture ： the mixture＇ s resistance to water damage become strong first and then decreased with the deepening of the degree of aging, the peak value appeared at 2 d, and tended to be stable after 4 d. Meanwhile, higher the level of the mixture has suffered water damage, the smaller the resistance to water damage.