不同间断级配橡胶沥青混合料性能对比研究

发布时间：2018-01-11 22:22

  本文关键词：不同间断级配橡胶沥青混合料性能对比研究　出处：《长安大学》2014年硕士论文　论文类型：学位论文

  更多相关文章： 橡胶沥青路面 间断级配 裂解 技术性质 微观分析 路用性能

【摘要】：将废旧轮胎生产成橡胶粉应用于道路工程，不仅实现了废弃物循环利用的目的，而且可改善沥青路面的使用性能，进而延长沥青路面的使用寿命。然而橡胶沥青混合料的性能受到橡胶沥青技术性质的影响，且影响橡胶沥青技术性质的工艺参数较多。对此，论文在分析关键工艺参数对橡胶沥青技术性质影响的基础上，对比研究基于选定的间断级配和SMA级配的不同橡胶沥青混合料性能，并与SBS改性沥青混合料性能进行对比研究，以期寻找出性能优良的橡胶沥青混合料，指导实际工程应用，以使橡胶沥青得到推广应用。 论文采用湿法工艺研究了基质沥青类型、胶粉掺量、裂解剂掺量以及裂解时间四大因素的变化对橡胶沥青技术性质的影响。同时，通过荧光显微镜的微观分析可知，不同影响因素下橡胶沥青的微观结构存在较大的差异，，橡胶沥青微观结构的变化是引起橡胶沥青技术性质发生变化的主要原因。 论文着重对不同橡胶沥青混合料的性能进行了研究。针对不同工艺参数的橡胶沥青间断级配混合料，以相同的油石比对比分析路用性能及工作性，结果表明：Q90#沥青+20％胶粉+4‰裂解剂+裂解3小时的橡胶沥青间断级配混合料更适用于工程实践，其工作性也比较优良。在以该技术参数橡胶沥青进行选定SMA-13级配混合料的性能对比试验，分析发现，橡胶沥青SMA-13混合料的高温稳定性能更为优越；当添加纤维后，高温稳定性能提升幅度更大，但是水稳定性能和工作性稍有变差。研究还发现，不论哪种间断级配，橡胶沥青混合料的低温抗裂性能和水稳定性能均优于SBS改性沥青混合料。
[Abstract]:The application of waste tire to rubber powder in road engineering can not only achieve the purpose of recycling waste, but also improve the performance of asphalt pavement. Then prolong the service life of asphalt pavement. However, the performance of rubber asphalt mixture is affected by the technical properties of rubber asphalt, and there are many technological parameters that affect the technical properties of rubber asphalt. On the basis of analyzing the influence of key process parameters on the technical properties of rubber asphalt, the performance of different rubber asphalt mixtures based on selected discontinuous gradation and SMA gradation is studied. The performance of rubber asphalt mixture is compared with that of SBS modified asphalt mixture, in order to find out the rubber asphalt mixture with good performance and guide the practical engineering application, so that the rubber asphalt can be popularized and applied. In this paper, the effects of the type of asphalt, the content of rubber powder, the amount of pyrolysis agent and the cracking time on the technical properties of rubber asphalt were studied by wet process. According to the microscopic analysis of fluorescence microscope, there are great differences in microstructure of rubber asphalt under different influence factors. The change of microstructure of rubber asphalt is the main reason for the change of technical properties of rubber asphalt. This paper focuses on the performance of different rubber asphalt mixture. For the rubber asphalt discontinuous gradation mixture with different process parameters, the road performance and workability are compared with the same asphalt ratio. The results show that the rubber asphalt discontinuous gradation mixture with 4 鈥

本文编号：1411485