CRP改性剂应用于SMA级配沥青混合料的性能研究

发布时间：2018-02-11 18:31

本文关键词： CRP改性剂改性沥青混合料 SMA-13混合料路用性能干掺工艺　出处：《重庆交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着我国高等级公路的沥青路面建设持续发展,对沥青的质量提出了更高的要求,改性沥青正广泛地应用于高速公路及低等级公路建设,研制和生产改性沥青,提高沥青路面的使用性能和耐久性,已成我国目前公路建设的重要课题之一。沥青马蹄脂混合料(SMA)是近些年来国际上一种非常引人注目的新型沥青混合料,其抗车辙性能和抗滑性优异,逐渐在高速公路、城市快速路、机场跑道等路面上广泛应用。针对目前的SMA混合料,较为成熟的是使用SBS改性沥青,而CRP改性剂是重庆交通大学研制出的一种新型沥青改性剂,并作为国内的专利技术,成功解决了塑料改性沥青离析严重、存储稳定性差等问题,并与沥青的相容性优异。本文结合目前沥青路面的病害形式,通过大量室内试验研究,对CRP改性沥青及其改性混合料进行深入的研究、分析,并对其改性AC-13及SMA-13混合料做了实际研究,重点研究了其应用于SMA混合料的高温、低温、水稳定性能。主要研究内容及成果如下:①通过实验室内高速剪切乳化工艺,分别制得不同掺量的CRP改性沥青及SBS改性沥青,对改性沥青的性能指标进行测试,并提出CRP改性剂的最佳掺量为5.5%。②选择经工程实践论证的沥青混合料级配(贵清高速AC-13、柳南高速SMA-13级配),分别进行CRP与SBS改性沥青混合料的配合比设计,并通过试验对比分析CRP与SBS改性沥青混合料的高温、低温、水稳定性能,表明CRP改性剂应用于AC-13、SMA-13混合料路用性能良好。③结合贵阳某拌和站集料,进行CRP改性该SMA-13混合料配合比设计,测试其混合料各项路用性能。进一步表明CRP使用于不同级配、不同集料的SMA混合料,都能使其路用性能满足要求。④CRP干法生产SMA-13混合料的施工工艺简便且混合料路用性能良好。CRP改性剂不仅能改变沥青路面的路用性能、延长其使用寿命、降低工程造价。同时CRP(生活废旧塑料)改性剂为资源资源的回收、环境保护提供了良好的途径,因此具有广阔的市场前景。
[Abstract]:With the continuous development of asphalt pavement construction of high grade highway in our country, the quality of asphalt is required higher. Modified asphalt is widely used in highway and low grade highway construction, and the modified asphalt is being developed and produced. Improving the performance and durability of asphalt pavement has become one of the most important topics in highway construction in our country. Asphalt horseshoe asphalt mixture (SMA) is a new type of asphalt mixture which has attracted much attention in the world in recent years. It has excellent rutting resistance and skid resistance and has been widely used on highways, urban expressways, airport runways and other pavements. In view of the current SMA mixture, it is more mature to use SBS modified asphalt, CRP modifier is a new asphalt modifier developed by Chongqing Jiaotong University. As a patent technology in China, it has successfully solved the problems of serious segregation and poor storage stability of plastic modified asphalt. In this paper, the CRP modified asphalt and its modified mixture are deeply studied and analyzed through a large number of laboratory experiments combined with the current asphalt pavement disease form. The performance of high temperature, low temperature and water stability of modified AC-13 and SMA-13 mixtures are studied in detail. The main research contents and results are as follows: 1. Through the high speed shear emulsification process in laboratory, the main research contents and results are as follows: 1. CRP modified asphalt and SBS modified asphalt with different contents were prepared, and the performance indexes of modified asphalt were tested. The optimum content of CRP modifier is 5.52.The asphalt mixture gradation (Guiqing High Speed AC-13, Liunan High Speed SMA-13 gradation), which is proved by engineering practice, is chosen to design the mix ratio of CRP and SBS modified asphalt mixture, respectively. The high temperature, low temperature and water stability of CRP and SBS modified asphalt mixture are compared and analyzed. The results show that CRP modifier is applied to AC-13 SMA-13 mixture with good road performance. 3 combined with the aggregate of a mixing plant in Guiyang. The mix ratio design of the SMA-13 mixture modified by CRP is carried out, and the road performance of the mixture is tested. It is further shown that CRP is used in the SMA mixture with different gradation and different aggregates. Both of them can make the pavement performance meet the requirement. 4CRP dry method can produce SMA-13 mixture with simple construction technology and good pavement performance. The modifier can not only change the pavement performance of asphalt pavement, but also prolong its service life. At the same time CRP (Life waste Plastics) modifier provides a good way for the recovery of resources and environmental protection, so it has a broad market prospect.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

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