论文部分内容阅读
胶粉改性沥青混合料是一种典型的粘弹性材料,具有很好的抗高温和抗低温开裂性能。由于利用了废旧橡胶轮胎对于减少黑色污染,发展循环经济和保护环境,具有重要意义。通过配合比相同的胶粉改性沥青和SBS改性沥青混合料的弯曲蠕变对比试验,研究了在?15℃、0℃、15℃、30℃和45℃下两种沥青混合料粘弹特性。得出胶粉改性沥青和SBS改性沥青混合料在不同温度下的蠕变应变-时间对比曲线及蠕变速率。可以看出,胶粉改性沥青混合料比SBS改性沥青混合料具有更好的低温性能。同时发现,Burgers模型可较好的模拟其粘弹性力学特性,通过拟合得出粘弹性参数,并利用ABAQUS软件模拟了弯曲蠕变试验过程。
Rubber powder modified asphalt mixture is a typical viscoelastic material, with good high temperature and low temperature cracking resistance. Due to the use of scrap rubber tires for reducing black pollution, the development of circular economy and environmental protection, is of great significance. By comparing the flexural creep tests with the same rubber modified asphalt and SBS modified asphalt mixture, two types of asphalt mixture visco-elastic viscoelasticity at -15 ℃, 0 ℃, 15 ℃, 30 ℃ and 45 ℃ characteristic. The creep strain-time curves and creep rates of rubber-modified asphalt and SBS-modified asphalt mixture at different temperatures were obtained. It can be seen that the rubber powder modified asphalt mixture has better low temperature performance than the SBS modified asphalt mixture. It is also found that the Burgers model can simulate its viscoelastic properties well. The viscoelastic parameters are obtained by fitting and the bending creep test process is simulated by ABAQUS software.