废胎胶粉掺量对橡胶沥青及混合料性能的影响分析

Effect of Waste Tire Rubber Powder Content on Rubber Asphalt and Mixture Performance

沥青中掺入废胎胶粉可改善沥青的各项性能指标,并增强沥青混合料的高温稳定性和低温抗裂性。在基质沥青不变的条件下,随着废胎胶粉掺量的增加,橡胶沥青的旋转粘度、针入度、软化点、低温延度和弹性恢复增大,橡胶沥青混合料的动稳定度和低温破坏应变也相应增大。

Adding waste tire rubber powder into asphalt can improve asphalt performance indexes of the asphalt, at the same time enhance the high temperature stability and low temperature crack resistance of asphalt mixture. With the waste tire rubber powder dosage increasing, rotary viscosity, penetration, softening point, low-temperature ductility and elastic recovery of rubber asphalt increas when using the same base asphalt,rubber asphalt mixture dynamic stability and low-temperature failure strain also increase accordingly.