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纳米SiO2改性沥青混合料的路用性能

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Keywords: 道路工程,沥青混合料,纳米Si02,路用性能

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Abstract:

为了研究纳米Si02对基质沥青混合料路用性能的影响与改善,采用车辙试验、低温弯曲试验、浸水马歇尔试验和冻融劈裂试验分析了纳米Si02改性沥青混合料的高温稳定性、低温抗裂性和水稳定性,并与基质沥青混合料进行对比验证。在此基础上,采用SPT试验和间接拉伸试验进一步验证了纳米Si02对沥青混合料高低温性能改善性效果。结果表明与基质沥青混合料相比,纳米Si02改性沥青混合料的高温稳定性和水稳定性显著提高,低温性能略有降低,但仍能满足沥青路面对低温抗裂性能的要求。证明了纳米Si02改性沥青混合料具有优良的路用性能,也证明了其在实际工程应用中的可行性。

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