冻融循环对沥青混凝土路面全厚度车辙影响的试验研究

Experiment and Study on Influence of Freeze-Thaw Cycle on Total Thickness Asphalt Concrete Pavement Rutting

近些年全球气候异常,全国许多地区冻融现象明显。为研究冻融循环对武汉地区沥青混凝土路面的影响程度,分别对经历过0、10、20、40次冻融循环的沥青混凝土试件进行了冻融循环试验研究,主要测定了试件的动弹性模量和质量损失等技术指标。同时对经历过0、10、20、40次冻融循环次数的试件进行全厚度车辙试验,得出动稳定度DS和车辙深度RD随冻融循环次数增加的变化规律。研究结果表明:冻融循环对沥青混凝土路面车辙的影响不容忽视。

The global climate is unusual in recent years, and the phenomenon of freezing and thawing is obvious in many aeras of China. To study the influence of freeze-thaw cycle on asphalt concrete pavement of Wuhan Province,the experiment and study on asphalt concrete suffering 0,10,20,40 freeze-thaw cycles are carried out, and the dynamic elastic modulus and the weigh loss are measured. Through the total thickness rutting tests suffering 0,10,20,40 freeze-thaw cycles, the change rule of dynamic stability and rut depth by freeze-thaw cycle is found. The study results show that the influence of freeze-thaw cycle on asphalt rutting can not be ignored.