影响沥青混合料抗剪强度的试验研究

通过对影响沥青混合料抗剪强度参数的因素进行试验分析,研究不同的集料类型、沥青混合料级配、沥青用量以及压实度因素对抗剪强度参数的影响。结果表明:沥青是影响最大抗剪强度的主要因素,集料特性对混合料的内摩阻角影响显著;在最佳沥青用量附近,混合料的最大抗剪强度达到最大值;最大抗剪强度随着压实度增大、空隙率减小而增大,可以通过增加压实度使沥青路面抗剪能力增大。

Research on Influencing Factors of Asphalt Mixture Shear Strength Parameters

The paper analyses influencing factors of asphalt mixture shear strength parameters by testing methods, including different aggregate types, asphalt mixture gradation, asphalt content and compactness. The testing results show that asphalt is the main influencing factor of shear strength, and the aggregate characteristic obviously influences the internal friction angle of mixture. The maximum shear strength of mixture will be up to the maximum value near the optimum asphalt content. The maximum shear strength increases with the increment of compactness and decrement of porosity. Shear ability of asphalt pavement can be improved by the increment of compactness.