沥青路面用复合定形相变材料的路用性能研究

发布时间：2018-11-19 17:47

【摘要】：为研究复合定形相变材料对沥青混合料路用性能的影响,制备沥青路面用复合定形相变材料,测定相变材料的相变温度、相变焓等热物性参数,借助马歇尔稳定度试验、低温弯曲试验、冻融劈裂试验与车辙试验等方法研究掺加复合定形相变材料沥青混合料的路用性能。试验结果表明,对于最佳沥青用量,掺与未掺复合定形相变材料的沥青混合料差别很小;复合定形相变材料可显著改善沥青混合料的低温抗裂性能;复合定形相变材料有利于提高沥青混合料的水稳定性;对于动稳定度,基质沥青混合料的明显大于掺加复合定形相变材料的沥青混合料,且沥青混合料的高温稳定性随着复合定形相变材料掺量的增大而降低。综合考虑掺加复合定形相变材料沥青混合料的路用性能,推荐本研究制备的复合定形相变材料在实际应用中采取0.3%的掺量。
[Abstract]:In order to study the influence of composite set phase change material on the pavement performance of asphalt mixture, the composite set phase change material for asphalt pavement was prepared, and the phase change temperature and enthalpy of phase change material were measured, and the Marshall stability test was used to study the effect of phase change material on the road performance of asphalt mixture. The low temperature bending test, freeze-thaw splitting test and rutting test were used to study the pavement performance of asphalt mixture with compound fixed phase change material. The experimental results show that for the optimum asphalt content, the difference between the asphalt mixture with and without the composite set phase change material is very small, and the low temperature crack resistance of the asphalt mixture can be significantly improved by the composite set phase change material. The composite set phase change material is helpful to improve the water stability of asphalt mixture. For dynamic stability, the base asphalt mixture is obviously larger than the asphalt mixture mixed with the composite fixed phase change material, and the high temperature stability of the asphalt mixture decreases with the increase of the content of the composite set phase change material. Considering the pavement performance of asphalt mixture with composite phase change material, it is recommended that the content of 0.3% should be adopted in the practical application of the composite set phase change material prepared in this study.
【作者单位】：长安大学特殊地区公路工程教育部重点试验室;中交第一公路勘察设计研究院有限公司;
【基金】：“十二五”国家科技支撑计划(2014BAG05B04) 交通运输部建设科技项目(2013318490010) 中央高校基本科研业务费专项资金项目(310821175012)
【分类号】：U414

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