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RAP离析对再生沥青混合料性能的影响分析

DOI: 10.3969/j.issn.1674-0696.2013.05.12, PP. 953-957

Keywords: 再生沥青混合料,路用性能,级配离析,recycledasphaltmixture,pavementperformance,gradationsegregation

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Abstract:

:?通过室内模拟试验,分析了沥青回收料(RAP)离析状态和程度对再生料体积参数、力学性能和路用性能的影响。结果表明:RAP离析对再生料性能影响比较显著,且RAP偏粗离析对再生料性能的影响大于偏细离析的影响。在RAP偏粗离析时,造成再生料空隙率过大,对水稳定性极为不利,且大幅度降低再生料的低温性能、疲劳性能和强度,且在同一程度的离析情况下,对再生料性能的影响大于原生料。在RAP偏细离析时,虽然对再生料的水稳定性和抗疲劳性能无不利影响,但将使再生料的抗车辙性能和低温抗裂性能显著降低。

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