基于灰熵法的沥青混合料低温抗裂性能影响因素研究

Research on Influencing Factors of Low-temperature Crack Resistance of Asphalt Mixture Based on Grey Correlation Entropy Method

通过小梁低温弯曲试验测试沥青混合料的临界弯拉应变指标,运用灰熵法分析影响沥青混合料低温抗裂性因素——集料级配、石料种类、沥青针入度、沥青用量、空隙率、4.75 mm筛孔通过率及拌和温度等的显著性。研究结果表明:沥青用量、沥青针入度、集料级配对沥青混合料低温抗裂性具有较显著影响。

Low temperature bending tests were carried out to obtain the critical bending strain of asphalt mixture.Then grey correlation entropy method was applied to the significance analysis of influencing factors of low-temperature crack resistance of asphalt mixture such as aggregate gradation,type of stone,asphalt penetration,asphalt content,volume of air voids,passing percent of 4.75 mm mesh and mixing temperature.The results indicated that asphalt content,asphalt penetration and aggregate gradation could exert great influence on the low-temperature crack resistance of asphalt mixture.