MAC与SBS复合改性沥青及其混合料性能及耐久性研究

发布时间：2018-01-07 01:38

本文关键词：MAC与SBS复合改性沥青及其混合料性能及耐久性研究　出处：《公路工程》2017年02期 　论文类型：期刊论文

【摘要】：为了解决MAC改性沥青混合料低温病害突出的问题,通过对MAC与SBS复合改性沥青针入度指标性能和PG分级系统研究,确定了MAC与SBS适宜的掺配比例,系统评价了不同MAC和SBS掺量复合改性沥青混合料的路用性能。试验结果表明,MAC与SBS复合改性沥青混合料具有优良的路用性能,MAC与SBS复合可以充分发挥SBS与MAC各自对沥青的改性作用,提高沥青混合料的综合路用性能。MAC与SBS复合改性沥青中,MAC的推荐掺量为2.5%~3.0%,SBS添加量为2.0%~3.0%;MAC与SBS复合改性沥青可大幅改善SMA以及AC沥青混合料的综合路用性能,其抗疲劳耐久性优于SBS改性沥青混合料;实体工程和试验段检测结果表明,MAC与SBS复合改性沥青混凝土延长了道路的使用寿命,经济、社会效益显著。
[Abstract]:In order to solve the serious problem of low temperature disease of MAC modified asphalt mixture, the penetration performance of MAC and SBS modified asphalt and PG classification system were studied. The suitable blending ratio of MAC and SBS was determined, and the pavement performance of the mixed modified asphalt mixture with different MAC and SBS content was systematically evaluated. MAC and SBS composite modified asphalt mixture has good road performance. The combination of SBS and SBS can give full play to the effect of SBS and MAC on asphalt modification. To improve the comprehensive performance of asphalt mixture. The recommended content of SBS in modified asphalt is 2.5% and 3.0% respectively. The composite asphalt of MAC and SBS can greatly improve the comprehensive pavement performance of SMA and AC asphalt mixture, and its fatigue durability is better than that of SBS modified asphalt mixture. The test results of solid engineering and test section show that the composite modified asphalt concrete with SBS can prolong the service life of the road, and the economic and social benefits are remarkable.
【作者单位】：贵州交通职业技术学院;
【基金】：国家自然基金项目(51311750) 国家科技支撑计划项目(2013BAG13A09) 陕西省自然科学基金项目(ZR2013EEQ098)
【分类号】：U414
【正文快照】： 0引言MAC(Multigrade asphaltcement)是一种优良的改性剂,属于化学改性剂范畴,可改善沥青混合料的高温性能,提高集料与沥青的粘附性,改善沥青混合料的水稳定性、抗疲劳性能和抗老化性能,但MAC低温延展性和柔性较差,掺加MAC后沥青混合料低温性能改善效果不明显甚至低温性能下降

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