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OALib Journal期刊
ISSN: 2333-9721
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离析对沥青混合料路用性能的影响
Keywords: 道路工程,沥青混合料,性能试验,离析
Abstract:
针对目前离析对沥青混合料路用性能影响大多数是定性的研究,没有全面定量的研究现状。将沥青混合料离析分为偏细、无、轻度和重度等4种水平。室内模拟了不同程度离析混合料级配、沥青用量与空隙率等关键指标的变异性,分别测定了不同程度的离析条件下沥青混合料高温稳定性、水稳定性和抗疲劳性能,定量分析离析水平下沥青混合料路用性能衰减程度,研究离析对沥青混合料路用性能的影响。试验结果表明,高温稳定性在偏细、重度离析时明显降低；相对于均匀沥青混合料,混合料变细使得沥青混合料水稳定性和抗疲劳性能略有提高；轻度离析、重度离析的水稳定性分别降低34%、51%；同样抗疲劳性能也分别降低30%~50%,50%~70%。
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