寒冷地区沥青路面容许空隙率分析

Analype the Porosity of the Asphalt Surface Course on Expressway in Frigid Areas

目前,寒冷地区沥青路面早期病害较多,影响其抗冻耐久性。而沥青混合料的冻融耐久性,主要与压实后混合料的空隙率有关。在冻融循环与行车荷载的作用下,就会产生松散、剥落、飞散及坑槽,严重降低路面的平整度,甚至降低使用寿命。以长平高速公路试验数据为依据,提出了寒冷地区高速公路沥青表层的容许空隙率的界限。

At present, there are so many harms of asphalt surface in frigid area, it can influence the stability. The stability mainly related with porosity. Affected by skid-resistance and transportation stree it may reduce the using life, as loosen, drop off, unfix and the hole. According to the test data of Changping road, it offers the limitation about porosity of the asphalt surface course on expressway in frigid areas.