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为了评价动稳定度与试验温度的相关性,选用2种沥青、3种矿料级配,分析了在不同试验温度下,不同类型沥青混合料动稳定度的变化规律;采用几何算法推导不同温度下沥青混合料动稳定度计算公式。试验结果表明:在良好的级配组成条件下,大粒径矿料级配高温稳定性较好;在相同温度条件下,SBS改性沥青混合料动稳定度值远远大于基质沥青混合料;沥青不同,动稳定度减小规律也不尽相同,基质沥青呈现3段式,改性沥青则为2段式;动稳定度随温度变化而减小的突变节点出现在软化点附近3~6℃。
In order to evaluate the relationship between dynamic stability and test temperature, two asphalt and three mineral gradations were selected to analyze the dynamic stability of different types of asphalt mixtures at different test temperatures. Geometrical algorithms were used to derive different temperature Dynamic stability of asphalt mixture under the formula. The experimental results show that under the condition of good gradation, the stability of large particle size mineral gradation is better. Under the same temperature, the dynamic stability of SBS modified asphalt mixture is far greater than that of matrix asphalt mixture. Asphalt has different dynamic stability, the law of reduction is also different, the matrix asphalt exhibits 3-segment type and the modified asphalt shows 2-segment type. The sudden change point of dynamic stability decreases with temperature, which appears in the vicinity of the softening point ℃.