废旧材料提高沥青路面性能的应用研究

发布时间：2018-06-13 13:04

本文选题：废旧橡胶 + 改性沥青　；参考：《河北工业大学》2014年硕士论文

【摘要】：随着我国高等级公路里程的不断增加，人们对公路路面路用性能和使用寿命的要求也越来越高。沥青混合料的主要组成成分为沥青、矿料和添加剂等，其中沥青及添加剂的质量决定了沥青路面的路用性能。目前，对矿料级配修改的可能性较小，诸多研究者的研究方向集中在改善沥青性能及添加剂上。沥青是一种粘弹塑性材料，对温度条件非常敏感，在通常情况下，基质沥青低温容易开裂，高温下容易变软，在同一地域两者性能很难兼顾，这就衍生出改性沥青的研究和生产。本论文主要研究内容是在基质沥青中加入预处理的废旧材料（废旧橡胶粉），通过室内试验分析改性后的沥青及其混合料的各种性能，结合实际应用案例，最终实现提高沥青路面性能的目的。改性沥青指的是一种混入树脂、橡胶粉和其他聚合物的沥青，掺入物与沥青发生反应，，使沥青混合料的性能得到改进。目前我国最常用的沥青改性剂是通过掺入聚合物达到目的。废橡胶的再利用是处理废旧轮胎等最合理和有效的方法。伴随着高分子化学技术的发展，利用废旧轮胎材料进行沥青改性的技术取得了快速的突破。利用废旧橡胶粉增强沥青混合料的性能，综合提高沥青路面高温稳定性能，低温抗裂性能、水稳定性能和抗疲劳性能。分析橡胶改性沥青和橡胶改性沥青混合料以提高沥青路面综合性能，运用它们的增强机理，研究出相应的工程应用技术、材料配合比、技术标准、质量控制等。通过对不同掺入量的橡胶改性沥青与SBS改性沥青、普通沥青进行室内平行试验以确定橡胶改性沥青最佳掺入量、时间、温度等，通过对橡胶改性沥青混合料与SBS改性沥青混合料、普通沥青混合料的配比试验确定最佳油石比及矿料级配等，最后通过对铺筑试验路段的长期跟踪调查确定相关的施工应用技术及质量控制标准。利用废旧材料提高沥青路面性能的应用研究，在改善路面性能的前提下也为保护生态环境提供了一条可行的途径，最终实现经济效益和社会效益双赢。
[Abstract]:With the increasing of highway mileage in our country, the requirements of road performance and service life of highway pavement are more and more high. The main components of asphalt mixture are asphalt, mineral aggregate and additives. The quality of asphalt and additives determines the pavement performance. At present, the possibility of modifying the gradation of mineral aggregate is relatively small, and many researchers focus on improving asphalt performance and additives. Asphalt is a viscoelastic-plastic material, which is very sensitive to temperature conditions. In general, the base asphalt is prone to crack at low temperature and soft at high temperature, so it is difficult to take both properties into account in the same area. This gives rise to the research and production of modified asphalt. The main research content of this paper is to add the waste material (waste rubber powder) to the matrix asphalt, and analyze the performance of the modified asphalt and its mixture through laboratory test, combined with the practical application case. Finally, the purpose of improving the performance of asphalt pavement is realized. Modified asphalt is a kind of asphalt mixed with resin, rubber powder and other polymers. The mixture reacts with asphalt and improves the performance of asphalt mixture. At present, the most commonly used asphalt modifier in China is by adding polymer to achieve the purpose. The reuse of waste rubber is the most reasonable and effective method to deal with waste tires. With the development of polymer chemical technology, the technology of asphalt modification with waste tire materials has made a rapid breakthrough. The performance of asphalt mixture is enhanced by waste rubber powder to improve the high temperature stability, low temperature crack resistance, water stability and fatigue resistance of asphalt pavement. This paper analyzes rubber modified asphalt and rubber modified asphalt mixture in order to improve the comprehensive performance of asphalt pavement. By using their strengthening mechanism, the corresponding engineering application technology, material mix ratio, technical standard, quality control and so on are studied. Through the indoor parallel test of rubber modified asphalt and SBS modified asphalt and ordinary asphalt, the optimum blending amount, time and temperature of rubber modified asphalt were determined. Through the test of rubber modified asphalt mixture, SBS modified asphalt mixture and ordinary asphalt mixture, the optimum ratio of asphalt to stone and the gradation of mineral aggregate were determined. Finally, the relevant construction application technology and quality control standard are determined by the long-term follow-up investigation of the paving test section. The application research of using waste materials to improve the performance of asphalt pavement provides a feasible way to protect the ecological environment under the premise of improving the pavement performance and finally realizes the win-win of economic and social benefits.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414

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