硫磺改性沥青混合料的动态模量试验分析

Dynamic Modulus Test Analysis of Sulfur Modified Asphalt Mixture

采用UTM系统对不同硫磺掺量(质量比)的沥青混合料进行动态模量试验,分析了温度、加载频率和硫磺掺量对沥青混合料黏弹特性的影响.结果表明:温度和加载频率对硫磺改性沥青混合料和普通沥青混合料动态模量的影响规律基本相同;不同硫磺掺量对沥青混合料黏弹性能的影响有所不同,硫磺掺量较小时,沥青混合料的黏性增加,温度敏感性增大;硫磺掺量较大时,沥青混合料的弹性增加,温度敏感性降低.

UTM system was used to test asphalt mixture＇s dynamic modulus with different sulfur contents （by mass）. The influences of temperature, loading frequency and sulfur content on the viscoelastic properties of asphalt mixtures were analyzed. The results show that the temperature and loading frequency have the same influence on dynamic modulus of both sulfur modified asphalt mixture and conventional asphalt mixture. The effect of sulfur contents on viscoelastic properties of asphalt mixtures is different. A small quantity of sulfur will increase asphalt mixture＇s viscosity and temperature sensitivity, but a large quantity of sulfur will increase asphalt mixture＇s elasticity and reduce temperature sensitivity.