沥青混凝土低温线收缩系数试验研究

Experimental research on the linear contractive quotiety of asphalt concrete

本文结合实际工程,对沥青混凝土进行低温段线收缩系数的试验研究。试验内容主要包括沥青品种、沥青含量、以及不同温度段中沥青混凝土线收缩系数的测试。试验结果表明:沥青品种对沥青混凝土的线收缩系数的影响较大,沥青混凝土在不同温度段的线收缩系数相差很大,而沥青含量(变化范围±0.3%)、升温或降温过程对其的影响较小。

The experimental research on the linear contractive quotiety of asphalt concrete which is used in an asphalt concrete slab project is presented in this paper. There are many facts affect the linear contractive quotiety of asphalt concrete, such as the type of asphalt, the asphalt content in asphalt concrete and the temperature period of the asphalt concrete worked in. The test results indicate that the influence of the asphalt type and the temperature period on the value of linear contractive quotiety is very notable, while that of asphalt content （ variation within ± 0.3 % ）and the temperature raising and reducing process is relatively small.