论文部分内容阅读
试验采用约束试件温度应力试验仪 (TSRST)进行应力松弛试验 ,通过试验方法测得在不同温度下瞬时弹性模量 ,得到沥青混合料的松弛模量 G(t)。由松弛试验中应力随时间变化的数据 ,绘制不同温度下的应力松弛曲线 ,其结果较好地模拟了沥青混合料的粘弹性性质。通过松弛试验结果表明 Burgers模型只适合于描述短期 ,不适合于描述长时间下的松弛行为。
The stress relaxation test was carried out by using the restrained specimen temperature stress tester (TSRST). The instantaneous elastic modulus at different temperatures was measured by the test method, and the relaxation modulus G (t) of the asphalt mixture was obtained. The stress relaxation curves at different temperatures were plotted from the data of the stress changes with time in the relaxation test. The results better simulate the viscoelastic properties of the asphalt mixture. The relaxation test results show that the Burgers model is only suitable for describing short-term, not suitable for describing relaxation behavior over a long period of time.