国产稠油沥青混合料的低温破坏特性

The Ruptured Characteristics of Domestic Heavy Oil Asphalt at Low Temperature

本文采用等速加载的弯曲试验及劈裂试验研究了国产稠油沥青混合料的低温破坏特性及不同温度、不同加载速率条件下的破坏模式,用沥青混合料的极限强度、极限拉伸应变、破坏劲度模量及沥青混合料的脆化点等指标对沥青低温开裂性能进行了评价,说明试验用3种国产稠油沥青的低温抗裂性能达到或超过了国外进口沥青的水平.

This paper elaborates the research on the ruptured characteristics of domestic heavy oil asphalt mixture at low temperature by means of constant loading speed bending test and split test. An evaluation of asphalt itself was made on the ruptured cracking performance at low termperature according to the indices referred to ultimate strength, ultimate tensile strain, ruptured stiffness modulus and brittle point of the mixture under various temperatures and various loading speeds. It is justified that its anti-cracking performance at low temperature has reached to or exceeded the imported asphalt level.