橡胶颗粒沥青混合料配合比设计研究

发布时间：2018-07-29 20:44

【摘要】：近年来,随着社会的不断进步和汽车制造业的飞速发展,沥青混合料路面路用性能的改进以及减轻废旧轮胎带来的污染问题成为了困扰交通各部门的难题。一种非常有效的处理方式,就是将废旧轮胎制成橡胶颗粒加入到沥青混合料中。橡胶颗粒具有较大的弹性变形能力,在车辆荷载和自应力的作用下,对于薄冰路面会有一定的除冰雪能力本论文在广泛调研的基础上,对干法橡胶沥青混合料进行了关键技术的研究。通过大量试验研究,研究橡胶颗粒沥青混合料的配合比设计和最佳的拌和、成型工艺、分析在不同掺量和粒径的橡胶颗粒的影响下路面的路用性能有何改变,并对橡胶颗粒的掺量和粒径给出推荐值。分析影响干法橡胶沥青混合料的路用性能指标的原因。为该项技术在辽沈季节性冰冻地区的推广建立技术支撑,为该项技术的发展提供相关的研究成果。研究成果表明:橡胶颗粒沥青混合料的拌和时间应适当增加,并适当提高石料的加热温度与混合料的拌和温度,采用二次成型的工艺,能够明显降低橡胶颗粒沥青混合料的空隙率和回弹率,成型效果较好。与普通沥青混合料相比,干法橡胶沥青混合料具有良好的高温稳定性、低温抗裂性能和抗滑性能得到大幅度的提高和改善,其余指标均满足相应的规范要求。通过实体工程试验路的铺筑,对橡胶沥青路面的拌和工艺,铺筑工艺进行研究,并现场检测路面的各项路用性能指标,验证室内试验研究成果,最终提供适合的配合比设计和铺筑工艺。综上,干法橡胶颗粒沥青混合料具有突出的抗滑性能和抗车辙性能,同时低温抗裂性和耐久性也较普通沥青混合料得到大幅度提高,该混合料多项指标达到改性沥青混合料和SMA改性沥青混合料的标准,且施工工艺简单,造价低,并能有效的利用废橡胶资源,是一项具有良好推广应用前景的新技术。
[Abstract]:In recent years, with the continuous progress of society and the rapid development of automobile manufacturing industry, the improvement of pavement performance of asphalt mixture and the reduction of pollution caused by waste tires have become a difficult problem for various traffic departments. A very effective treatment is to add rubber particles from used tyres to the asphalt mixture. Rubber particles have a large elastic deformation capacity, under the action of vehicle load and self-stress, the thin ice pavement will have a certain ability to remove ice and snow on the basis of extensive investigation. The key technology of dry rubber asphalt mixture is studied. Through a large number of experimental studies, this paper studies the mix ratio design of rubber particle asphalt mixture and the optimum mixing and forming technology, and analyzes how the pavement performance changes under the influence of rubber particles of different content and particle size. The recommended value of the rubber particle content and particle size is also given. This paper analyzes the causes of affecting road performance index of dry rubber asphalt mixture. To establish the technical support for the popularization of this technology in the seasonal frozen area of Liaoning and Shenyang, and to provide relevant research results for the development of the technology. The research results show that the mixing time of rubber granular asphalt mixture should be increased properly, and the heating temperature of stone and mixing temperature of mixture should be raised appropriately, and the process of secondary molding should be adopted. It can obviously reduce the porosity and springback of rubber grained asphalt mixture, and the forming effect is better. Compared with ordinary asphalt mixture, dry rubber asphalt mixture has good high temperature stability, high temperature crack resistance and skid resistance, and other indexes meet the requirements of relevant specifications. The mixing technology and paving technology of rubber asphalt pavement are studied through the paving of the test road of solid engineering, and the road performance indexes of the pavement are tested on the spot, and the results of indoor test and research are verified. Finally, suitable mix ratio design and paving process are provided. In a word, dry rubber granular asphalt mixture has outstanding anti-slip performance and rutting resistance, at the same time, the low temperature crack resistance and durability are also greatly improved compared with the ordinary asphalt mixture. Many indexes of the mixture meet the standards of modified asphalt mixture and SMA modified asphalt mixture, and the construction technology is simple, the cost is low, and the waste rubber resources can be used effectively. It is a new technology with good prospect of popularization and application.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U414

【参考文献】