期刊论文

Study on Dynamic Flexural Modulus of Rubber Asphalt Mixture

中文

公路交通科技

1002-0268

2019

36

1

16-21,54

10.3969/j.issn.1002-0268.2019.01.003

本校为第一机构

为了研究沥青混合料的模量特性, 应用UTM材料试验机分别采用四点弯曲和梯形梁两种试验方法测试采用70#基质沥青和橡胶沥青两种不同沥青的混合料动态弯拉模量和相位角, 根据时温等效原理计算主曲线移位因子并绘制动态模量主曲线和相位角主曲线, 分析橡胶沥青混合料的动态黏弹特性; 对比分析两种动态弯拉模量试验方法对沥青混合料动态弯拉模量和相位角的影响.结果表明: 沥青混合料动态弯拉模量受温度和荷载频率影响较大, 随着温度升高而显著减小, 同时随着频率增大而增大; 高温时, 橡胶沥青混合料的动态模量显著大于70#基质沥青混合料, 拥有更好的高温性能; 橡胶沥青混合料受频率 (温度) 影响较小...

In order to study the modulus characteristics of asphalt mixture,the dynamic bending moduli and phase angles of the mixtures of matrix asphalt No. 70 and rubber asphalt are tested by UTM material testing machine using 4-point bending and trapezoidal beam test methods. According to the time-temperature equivalent principle,the shift factor of the master curve is calculated and the master curves of dynamic modulus and phase angle are drawn to analyse the dynamic viscoelasticity of rubber asphalt mixture. The influences of the 2 dynamic bending modulus test methods on the dynamic bending modulus ...