废旧塑料橡胶复合改性沥青应用技术研究

发布时间：2018-04-01 11:31

本文选题：废旧塑胶改性沥青　切入点：沥青混合料　出处：《东南大学》2015年硕士论文

【摘要】：随着我国经济的快速发展,汽车保有量不断增加,随之而来的是越来越多的废弃轮胎有待处理。考虑到焚烧以及掩埋带来的环境危害,回收利用成为处理方法的首选,其中将废旧轮胎碾碎作为沥青添加剂已成为一大应用趋势。同样,将废旧塑料作为添加剂以改善沥青性能,可避免在其他行业应用存在的困难。将废旧塑料以及橡胶同时应用于改性沥青,若能够稳定共存,不仅可更全面地改善沥青混合料的性能,亦能避免产生环境问题。论文以江苏宝利沥青有限公司提供的新型废旧塑料橡胶改性沥青为主要研究对象,通过常规试验、SHRP试验测试改性沥青各方面技术性能：采用显微镜观测了塑胶改性沥青的微观形貌；并通过离析试验确定了新型复合改性沥青的储存稳定性。其次,通过沥青混合料室内相关试验,测试了塑胶复合改性沥青的路用性能,包括高温抗车辙性能、低温抗裂性能、水稳定性、耐久性能,并与常用SBS改性沥青性能进行对比研究。试验结果表明,新型废旧塑胶改性沥青的稳定性较好,满足使用要求；在改善沥青混合料性能的基础上,改善了其低温性能,在此方面略优于SBS改性沥青；但加入添加剂后,混合料的黏度增大,需要更高的拌合以及施工温度。最后,选择合适地点铺筑试验路段,在此基础上,评价了废旧塑胶作为改性剂的环境以及经济效益,并同SBS改性沥青进行比较,确定了其代替SBS改性沥青的可能性。
[Abstract]:With the rapid development of China's economy, the number of cars is increasing, and more and more waste tires need to be disposed of. Considering the environmental hazards caused by incineration and burial, recycling becomes the first choice of treatment methods. Among them, crushing used tires as asphalt additive has become a trend. Similarly, waste plastics are used as additives to improve asphalt performance. Difficulties in application in other industries can be avoided. The application of both waste plastics and rubber to modified asphalt can not only improve the performance of asphalt mixture more comprehensively if it can coexist stably, but also improve the performance of asphalt mixture. The paper takes the new waste plastic rubber modified asphalt provided by Jiangsu Baoli Asphalt Co., Ltd as the main research object. The technical properties of modified asphalt were tested by SHRP test. The microscopic morphology of modified asphalt was observed by microscope, and the storage stability of new composite modified asphalt was determined by segregation test. Through laboratory test of asphalt mixture, the road performance of plastic composite modified asphalt was tested, including rutting resistance at high temperature, crack resistance at low temperature, water stability and durability. The experimental results show that the new waste plastic modified asphalt has better stability and meets the requirements of application, and improves its low temperature performance on the basis of improving the performance of asphalt mixture. In this respect, it is slightly better than SBS modified asphalt, but the viscosity of the mixture increases with the addition of additives, which requires higher mixing and construction temperature. Finally, the appropriate site is chosen to lay out the test section, and on this basis, The environment and economic benefit of waste plastics as modifier were evaluated, and compared with SBS modified asphalt, the possibility of replacing SBS modified asphalt was determined.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

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