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为了改善沥青混合料性能,选用消石灰作为外掺剂加入到沥青混合料中进行试验研究。沥青混合料中掺加消石灰一般用来替代常用的石灰石矿粉,并在原状、短期老化、长期老化状态下对沥青混合料的马歇尔稳定度、劈裂抗拉强度、冻融劈裂强度等试验进行测试分析。试验表明:3种状态沥青混合料经短期老化后残留稳定度和TSR基本上都增加;3种状态沥青混合料经长期老化后残留稳定度和TSR都下降;掺加消石灰能明显提高沥青混合料的马歇尔稳定度。
In order to improve the performance of asphalt mixture, choose lime as external admixture added to the asphalt mixture for experimental study. Asphalt mixture mixed with slaked lime is generally used to replace the commonly used limestone ore powder, and in the original shape, short-term aging, long-term aging of asphalt mixture Marshall stability, splitting tensile strength, freeze-thaw splitting strength test Test and analyze. The results show that the residual stability and TSR of the three kinds of asphalt mixtures increase after short-term aging. The residual stability and TSR of the three kinds of asphalt mixtures decrease after long-term aging. The addition of slaked lime can obviously improve the asphalt mixture Marshall stability.