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沥青混合料冻融损伤模型及寿命预估研究

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Keywords: 道路工程,沥青混合料,损伤模型,冻融试验,寿命预估

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Abstract:

为研究沥青路面抵抗冻融损害的能力,结合损伤理论,进行了沥青混合料冻融损伤模型及残余寿命预估的研究。建立了适用于冻融条件下沥青混合料损伤的普适模型,并提出了相应算法;然后根据快速冻融作用下混合料的各性能试验结果对该模型进行了验证;最后提出了模型应用于混合料冻融损伤后寿命预估的方法。结果表明随冻融循环次数增加,沥青混合料性能衰减,损失度增大;模型能较好的拟合沥青混合料冻融循环后各项性能指标的变化;宜将抗压回弹模量作为评价混合料抗冻融损坏能力的和寿命预估的主要指标。

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