中文摘要：

采用了APA汉堡车辙试验、低温弯曲试验、浸水马歇尔试验和冻融劈裂试验以及小梁疲劳试验，研究了硅藻土与橡胶粉复合改性沥青混合料的路用性能。试验结果表明，在18％橡胶粉掺量下，随着硅藻土掺量的增加，复合改性沥青混合料的高温稳定性增强，水稳定性、低温抗裂性以及疲劳性能提高，且18％橡胶粉＋1l％硅藻土复合后其综合路用性能与4．5％SBS改性沥青混合料相差不大。结合路用性能试验结果，最终推荐了橡胶粉与硅藻土的最佳掺配比例。

英文摘要：

This paper uses the APA Hamburg rutting test, cold bending test,immersion Marshall test and freeze-thaw splitting test and Weibull distribution based on probability and statistics trabecular fatigue were studied diatomite composite and rubber powder modified asphalt mixture performance. The test results show that 18% of the rubber powder content,with increasing diatomite content,the high temperature stability of the composite reinforced modified asphalt mixture, water stability, low temperature cracking resistance and fatigue performance improvement,and 20 after% ＋ 11% diatomite composite rubber powder road performance with its integrated 4.5 % SBS modified asphalt or less.