胶粉-HR复合改性沥青混合料性能试验研究

发布时间：2018-06-08 11:32

本文选题：胶粉复合改性 + 沥青混合料　；参考：《扬州大学》2015年硕士论文

【摘要】：近年来高等级公路出现了较大面积的路面损坏,其中高温稳定性类病害占多数,因此提高沥青混合料的高温性能,是当前路面材料研究的重点。胶粉改性沥青混合料的出现在一定程度上缓解了此问题,并且有效地解决了废旧轮胎造成的污染。但研究发现,在高温性能方面,胶粉改性沥青混合料较普通沥青混合料有了明显的改善,但还不能完全适应当前道路环境要求,尤其是高速公路的渠化交通及重载交通。因此,大幅度提高沥青混合料的高温性能对提高沥青路面服务质量、延长路面使用寿命有着很重要的意义。本文选取合适的复合剂HR对胶粉改性沥青混合料进行复合改性,针对胶粉-HR复合改性沥青混合料的组成结构特点对其进行配合比设计,找出合理的集料级配与最佳油石比,并进行沥青混合料路用性能测试,尤其高温性能的研究与评价,并且分析了其改性效果与综合效益。通过制备胶粉-HR复合改性沥青混合料,对其路用性能进行综合评价。试验结果表明：胶粉-HR复合改性沥青混合料的高温稳定性较SBS改性沥青混合料有显著的提高,低温抗裂性和水稳定性与SBS改性沥青混合料处于同一水平。随着应变水平的提高,胶粉-HR复合改性沥青混合料抗疲劳性能较SBS改性沥青混合料衰减缓慢,应变水平达到650με开始两者疲劳性能几乎处于同一水平。通过车辙试验与蠕变试验对胶粉-HR复合改性沥青混合料的高温性能进行研究,并且在试验过程中改变温度与荷载条件,以便综合评价其高温性能。车辙试验结果表明,胶粉-HR复合改性沥青混合料高温性能在高温重载条件下较SBS改性沥青混合料有显著的提高；蠕变试验结果表明,在同等试验条件下胶粉-HR复合改性沥青混合料的达到蠕变破坏阶段的累计作用次数增大。说明掺加复合剂后,胶粉改性沥青混合料的高温性能改善显著,且温度与荷载越大,高温性能改善效果越明显。通过抽提试验等方法对胶粉-HR复合改性沥青混合料的改性效果进行分析,结果表明,相对于SBS改性沥青混合料仅仅对于沥青性能的改善,胶粉-HR复合改性沥青混合料对沥青和混合料的双重改善效果更能全面提高和改善沥青路面的性能；胶粉-HR复合改性沥青混合料的使用具有突出的经济效益、环境效益和社会效益。本文为胶粉-HR复合改性沥青混合料的应用与推广提供了参考,具有一定的研究意义、实用价值和创新性。
[Abstract]:In recent years, there has been a large area of pavement damage on high-grade highway, among which high-temperature stability diseases account for the majority. Therefore, to improve the high-temperature performance of asphalt mixture is the focus of pavement materials research. The appearance of rubber powder modified asphalt mixture alleviates this problem to some extent and effectively solves the pollution caused by waste tires. However, in the aspect of high temperature performance, the rubber powder modified asphalt mixture has obviously improved compared with the ordinary asphalt mixture, but it can not fully adapt to the current road environment requirements, especially the freeway channelization traffic and heavy haul traffic. Therefore, it is of great significance to improve the service quality of asphalt pavement and prolong the service life of asphalt pavement by greatly improving the high temperature performance of asphalt mixture. In this paper, suitable compound agent HR is selected for compound modification of rubber powder modified asphalt mixture. According to the composition and structure characteristics of rubber powder -HR compound modified asphalt mixture, the mix ratio is designed to find out the reasonable aggregate gradation and the best ratio of oil stone. The road performance of asphalt mixture was tested, especially the high temperature performance was studied and evaluated, and the modification effect and comprehensive benefit were analyzed. The road performance of compound modified asphalt mixture of rubber powder-HR was evaluated. The experimental results show that the high temperature stability of rubber powder / HR composite modified asphalt mixture is significantly higher than that of SBS modified asphalt mixture, and the low temperature crack resistance and water stability are at the same level as SBS modified asphalt mixture. With the increase of strain level, the fatigue resistance of rubber powder / HR modified asphalt mixture is slower than that of SBS modified asphalt mixture, and the strain level reaches 650 渭蔚 and the fatigue performance of them is almost the same as that of SBS modified asphalt mixture. The high temperature performance of rubber powder-HR compound modified asphalt mixture was studied by rutting test and creep test, and the temperature and load conditions were changed in the course of the test, so as to evaluate its high temperature performance synthetically. The results of rutting test show that the high temperature performance of rubber powder / HR composite modified asphalt mixture is significantly higher than that of SBS modified asphalt mixture under high temperature and heavy load, and the creep test results show that, Under the same test conditions, the cumulative action times of rubber powder-HR composite modified asphalt mixture reached the creep failure stage increased. The results show that the high temperature performance of rubber powder modified asphalt mixture is improved obviously after the addition of compound agent, and the higher the temperature and load, the more obvious the effect of improving high temperature performance. The modified effect of compound modified asphalt mixture of rubber powder and HR is analyzed by extraction test. The results show that compared with SBS modified asphalt mixture, the performance of asphalt is only improved. The double improvement effect of compound modified asphalt mixture of rubber powder and HR can improve the performance of asphalt pavement more comprehensively, and the use of compound modified asphalt mixture of rubber powder and HR has outstanding economic benefit. Environmental and social benefits. This paper provides a reference for the application and popularization of rubber powder-HR compound modified asphalt mixture, which has certain research significance, practical value and innovation.
【学位授予单位】：扬州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

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