山区高速公路乳化沥青冷再生混合料疲劳性能研究

发布时间：2018-05-30 20:39

  本文选题：乳化沥青再生 + 配合比设计　； 参考：《重庆交通大学》2015年硕士论文

【摘要】：随着社会经济的快速发展、交通量和车辆载重的增加,导致路面病害越来越多,在90年代以后陆续建成的高速公路已进入大、中修期,目前的高速公路维修方式多为挖除或覆盖,重新铺筑新路面。而挖除的材料基本被废弃,其中沥青发生部分老化外,砂石等材料的功能依然存在。大量的翻挖、铣刨沥青混合料被废弃造成环境污染;另一方面,能源危机成为世界各国发展面临的一个重要问题。在此背景下,沥青路面重复再生利用,显得尤为重要。沥青路面冷再生技术是在20世纪80年代后期,路面冷铣刨工艺的基础上迅速发展起来的一种新技术,目前已成为世界各国道路维修改造的方法之一。本文首先对可回收沥青路面材料(RAP)中的沥青进行了回收和测定,通过筛分,确定了旧料的级配曲线和石料的各项性能。同时,对试验中所用的乳化沥青、水泥以及集料的性能进行了测定。然后,采用修正的马歇尔试验方法进行配合比设计,以劈裂强度、马歇尔稳定度、流值、抗压强度和孔隙率作为评价指标,综合考虑混合料的水泥用量、乳化沥青用量、旧料掺量和总用水量,确定最佳配合比。为研究各因素对劈裂强度的影响,以乳化沥青、水泥和水这三因素进行正交试验设计,分析各因素对乳化沥青冷再生混合料劈裂强度影响的显著性。采用SPSS软件对试验结果进行方差检验,确定各影响因素的显著水平和各水平的作用大小。在试验温度为5℃、15℃和20℃的条件下,进行再生混合料间接拉伸疲劳试验,分析不同含量的乳化沥青、水泥这两因素对间接拉伸疲劳试验结果的影响。利用统计学原理对间接拉伸疲劳试验进行分析,提出疲劳寿命方程和沥青再生混合料疲劳性能预估模型。最后综合考虑各种影响因素,对室内疲劳试验预估方程进行科学合理的修正,转化为实际路面疲劳寿命情况,同时得出了再生混合料的抗拉强度结构系数。
[Abstract]:With the rapid development of social economy and the increase of traffic volume and vehicle load, more and more pavement diseases have been caused. The current highway maintenance mode is to excavate or cover, rebuild the new road surface. The excavated materials are basically abandoned. Besides the partial aging of asphalt, the functions of sand and stone still exist. A large number of overturning, milling and planing asphalt mixture waste caused environmental pollution; on the other hand, the energy crisis has become an important problem facing the development of countries in the world. In this context, the recycling of asphalt pavement is particularly important. The cold recycling technology of asphalt pavement is a new technology developed rapidly on the basis of cold milling and planing technology in the late 1980s. It has become one of the methods of road maintenance and reconstruction in the world. In this paper, the asphalt in recycled asphalt pavement material (rap) is first recovered and measured. Through screening, the gradation curve of the old material and the properties of the stone are determined. At the same time, the properties of emulsified asphalt, cement and aggregate used in the test were measured. Then, the modified Marshall test method is used to design the mixture ratio. The splitting strength, Marshall stability, flow value, compressive strength and porosity are taken as evaluation indexes, and the cement content and emulsified asphalt content of the mixture are considered synthetically. The best mix ratio is determined by adding the used materials and the total water consumption. In order to study the effect of various factors on the splitting strength, the orthogonal experimental design was carried out with the three factors of emulsified asphalt, cement and water, and the significance of each factor on the splitting strength of cold recycled asphalt mixture was analyzed. SPSS software was used to test the variance of the test results to determine the significant level of each factor and the effect of each level. The indirect tensile fatigue test of recycled mixture was carried out at 5 鈩，

本文编号：1956743