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为了分析沥青混合料动稳定度的温度特性,对选用的2种沥青、3种矿料级配的沥青混合料进行不同试验温度条件下的车辙试验,并利用给出的Boltzmann S形成长曲线模型,量化分析沥青混合料动稳定度变化规律,提高了传统的60℃动稳定度的适用性。试验结果表明:沥青混合料“动稳定度-试验温度”试验结果与Boltzmann S形成长曲线有良好的相关性,不同沥青种类及混合料类型条件下曲线拟合的相关系数均在0.97以上;沥青混合料动稳定度随温度变化而产生突变的温度节点出现在软化点附近0~5℃,并且在选用的温度范围内,改性沥青混合料对环境温度的敏感程度整体上要大于基质沥青混合料。
In order to analyze the temperature stability of the dynamic stability of asphalt mixture, the rutting test of asphalt mixture with two kinds of asphalt and three kinds of mineral gradations was carried out under different test temperatures, and the Boltzmann S curve model , Quantitative analysis of the dynamic stability of asphalt mixture change law, improve the stability of the traditional 60 ℃ applicability. The experimental results show that there is a good correlation between the test results of asphalt mixture and Boltzmann S curve, and the correlation coefficients of curve fitting under different asphalt types and mixture types are all above 0.97 ; Temperature of asphalt mixture dynamic stability change with temperature appears in the temperature near the softening point 0 ~ 5 ℃, and in the selected temperature range, the sensitivity of the modified asphalt mixture to the ambient temperature as a whole is greater than the substrate Asphalt.