硅藻土改性沥青及其混合料路用性能研究

对硅藻土改性沥青及其混合料进行了一系列室内试验研究，包括沥青的技术性能试验，沥青混合料的高温车辙试验，低温弯曲劈裂试验，残留稳定度和冻融劈裂试验以及弯曲疲劳试验。研究结果表明硅藻土能改善沥青的高温、低温和抗老化性能；且硅藻土改性沥青混合料能显著提高混合料的水稳定性、低温性能，高温稳定性和抗疲劳性能，具有良好的路用性能，是一种值得推广的改性沥青混合料。

A Study on the Performance of Diatomite Modified Asphalt and the Mixture

A series of laboratory tests of the diatomite modified asphalt and the mixtures were made. These included asphalt technical property, rutting test at high temperature, bend and split test at low temperature, retained stability and freeze and thaw split test, bend fatigue test at room temperature. The results showed asphalt modified by diatomite can improve the performance of asphalt at high-temperature and low-temperature and anti-aged performance, the diatomite modified asphalt mixtures increase resistance to fatigue cracking and rutting and low temperature cracking, and decrease moisture sensitive than unmodified asphalt mixture.