硫磺改性沥青混合料间接拉伸模量的试验研究

Study on Indirect Tensile Stiffness Modulus of Sulfur Modified Asphalt Mixture

为了探究硫磺改性沥青路面温度敏感性较小的原因,采用不同试验温度下的间接拉伸劲度模量指标来分析混合料的感温性,并用车辙试验和低温约束温度应力试验来验证劲度模量的变化规律。试验结果证明硫磺改性技术可以有效地增大沥青混合料在高温下的劲度模量,而低温下的劲度模量基本不变,从而改善了路面的综合性能。

In order to find the reason why sulfur modified asphalt pavement has low temperature sensitivity,indirect tensile stiffness modulus index of different test temperature is used to analyze the mix temperature sensitive property.Then rutting test and TSRST test are used to verify the law of stiffness modulus.The test result indicate that sulfur modify technique can increase mix stiffness modulus in high temperatue and the same with normal asphalt in low temperature,thus the pavement integrated performance is improved.