硅藻土改性沥青混合料低温抗裂性能研究

Study of Low Temperature Anti-cracking Performance of Diatomite Modified Asphalt Mixture

将硅藻土掺配在沥青混凝土中,可以改善沥青混合料的物理力学性能,提高路面工程质量。为了确保硅藻土改性沥青混合料的低温抗裂性能,就必须用试验方法来评定它在低温下的性能。通过两种不同的硅藻土,采用压缩应变能、弯曲应变能的方法,进行硅藻土改性沥青低温性能研究。通过室内试验,证明硅藻土改性沥青混合料能够显著改善低温抗裂性能,硅藻土是一种非常好的改性剂。

Mixing diatomite with asphalt concrete can improve mechanical property of asphalt mixture and enhance quality of pavement engineering.In order to assure low temperature anti-crack performance of diatomite modified asphalt mixture, a test method must be adopted to evaluate its low temperature performance.This article adopts methods of compressing strain energy and bending strain energy to study low temperature performance of diatomite modified asphalt with two different diatomite by indoor test, proving the effectiveness of diatomite modified asphalt mixture in the improvement of low temperature anti-crack performance distinctly.