湿热地区沥青混合料水稳定性评价方法研究

针对湿热地区的实际情况,在分析和比较浸水马歇尔试验和冻融劈裂试验优缺点的基础上,自行设计了浸水劈裂试验。对相同材料,相同级配的沥青混合料分别进行这3种试验。试验结果分析表明:浸水马歇尔试验不宜作为沥青混合料水损坏的评价方法;冻融劈裂试验具有较好的区分性,和黏附性试验相关性也较好,但仍有一些不足之处;浸水劈裂试验对冻融劈裂试验进行了改进,比较适宜作为湿热地区沥青混合料水稳性能评价方法。

Study on the Water Stability of Asphalt Mixture in Hot and Damp Region

Based on the analysis and comparison of merits and demerits between immersion Marshall test and freez-tharw spilt test,immersion split test is designed aiming at the actual circumstance of hot and damp region.These three experiments are carried out with the same asphalt mixture and other materials.The study shows that immersion Marshall test is not appro- priate to evaluate the water damage of asphalt mixture;freez-tharw spilt test is relevant to adhesion test,but it still has some disadvantages;immersion split test improves freez-tharw spilt test,and it is suitable as the evaluation method of water stabil- ity of asphalt mixture.