不同压强作用下橡胶沥青混合料的水损害性能研究

发布时间：2018-03-09 03:01

本文选题：橡胶沥青　切入点：混合料　出处：《重庆交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着国民经济的发展,对于道路的使用性能要求越来越高,这直接促使沥青混合料路面的发展,早年修建的沥青路面早期破坏严重,随着运输行业的发展,汽车轴载逐渐增大,而且在我国国情下货车超载现象严重,这进而加速沥青路面的破坏。近年随着国内外沥青混合料的研究深入,开始关注这一破坏形式。目前,橡胶粉因其对沥青有良好的改性作用而且废旧橡胶对环境的危害很大,将废旧橡胶回收再利用,这将很好地解决这一问题。本文主要研究在车辙试验中不同轮压下橡胶沥青混合料中水稳定性表现,选出三种混合料级配,其中有:TYPE-B、AC-13、SMA-13,它们包含了半开级配、连续级配以及间断级配。本文采用基本的车辙试验为原型,设计了非浸水车辙试验和浸水车辙试验,在试验室规定的标准轮压(0.7MPa)基础上,依次提高轮压到0.8MPa、0.9MPa、1.0MPa进行试验,以此考察不同级配在轮压增加的情况下动稳定度的变化情况,最终评价不同橡胶混合料的水稳定性能。对各级配非浸水与浸水条件动稳定度结果进行回归分析,建立回归方程、确定回归系数,以此确定动稳定度随轮压变化趋势。并对比各轮压下不同级配的非浸水与浸水动稳定度,提出了残留动稳定度的概念,比较分析各级配动稳定度结果,随轮压的增加,各混合料的抗车辙能力变差的越快。TYPE-B路用性能及水稳定性好,是比较理想的橡胶沥青混合料;AC-13动稳定度表现较好,但在实际试验中表面纹路差、构造深度很小,综合路面使用性能较差;相较于TYPE-B和AC-13,由于SMA-13未添加高粘弹添加剂,其动稳定度小,高温稳定差,水稳定性要差得多。
[Abstract]:With the development of the national economy, the performance of the road is more and more demanding, which directly promotes the development of the asphalt mixture pavement. The early damage of the asphalt pavement built in the early years is serious. With the development of the transportation industry, the axle load of the vehicle increases gradually. Moreover, under the situation of our country, the phenomenon of truck overloading is serious, which accelerates the damage of asphalt pavement. In recent years, with the deep research of asphalt mixture at home and abroad, we begin to pay attention to this damage form. At present, Because rubber powder has good modification effect on asphalt and waste rubber is harmful to environment, waste rubber is recycled and reused. This will solve this problem very well. This paper mainly studies the water stability performance of rubber asphalt mixture under different wheel pressure in rutting test, and selects three kinds of mixture gradation, among them are: 1 TYPE-BU AC-13 SMA-13, which includes semi-open gradation. Continuous grading and discontinuous gradation. Based on the basic rutting test, the non-immersion rutting test and the immersion rutting test are designed in this paper. On the basis of the standard wheel pressure of 0.7MPa prescribed in the laboratory, the wheel pressure is increased successively to 0.8 MPA and 0.9 MPA to 1.0 MPA. The change of dynamic stability of different gradation under the condition of increasing wheel pressure was investigated, and the water stability performance of different rubber mixtures was evaluated finally. The regression analysis was carried out on the results of dynamic stability under the conditions of non-immersion and flooding, and the regression equation was established. The regression coefficient is determined to determine the variation trend of dynamic stability with wheel pressure. The concept of residual dynamic stability is put forward by comparing the non-immersion and immersion dynamic stability of different grades under different wheel pressures, and the results of distribution stability at all levels are compared and analyzed. With the increase of wheel pressure, the faster the rutting resistance of each mixture becomes worse. TYPE-B has better road performance and water stability. It is an ideal rubber asphalt mixture with better dynamic stability. However, in the actual test, the surface grain is poor and the structure depth is very small. Compared with TYPE-B and AC-13, compared with TYPE-B and AC-13, SMA-13 has less dynamic stability, lower high temperature stability and worse water stability.
【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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