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采用Superpave简单性能试验机(SPT)分别测试了布敦岩沥青混合料、基质沥青混合料和SBS改性沥青混合料在不同温度和加载频率下的动态模量和相位角,并根据时间-温度置换原理,通过非线性最小二乘拟合,确定了3种沥青混合料的动态模量主曲线和移位因子。结果表明,布敦岩沥青混合料具有优良的抵抗高温或低频荷载作用的能力,其动态模量满足法国高模量沥青混凝土的界定标准。
The dynamic modulus and phase angle of the Boudou rock asphalt mixture, the matrix asphalt mixture and the SBS modified asphalt mixture at different temperatures and loading frequencies were tested by Superpave simple performance testing machine (SPT), respectively. According to the time-temperature Displacement principle, through the nonlinear least square fitting, determine the dynamic modulus of three kinds of asphalt mixture master curve and displacement factor. The results show that the Boudun rock asphalt mixture has excellent ability to resist high temperature or low frequency load and its dynamic modulus meets the definition criteria of French high modulus asphalt concrete.