沥青路面裂缝修补材料研制及性能研究

发布时间：2018-04-21 02:17

本文选题：沥青路面 + 裂缝修补材料　；参考：《合肥工业大学》2015年硕士论文

【摘要】：我国的大部分沥青路面己进入了养护维修的高峰期,其中裂缝是沥青路面最主要的一种破损形式。路面一旦出现了裂缝,不但破坏路面结构的完整性,还大大的降低了行车舒适性和安全性,缩短路面的使用寿命,因此需要对裂缝进行及时修补。目前的修补材料,在性能和价格都存在着不足,需要研发新型的高性价比的修补材料。本文通过自制的高固含量(70.13%)的乳化沥青和水泥为基材配制了一种新型复合型修补材料。研究了不同聚灰比(0-0.2)和油灰比(0-1)下,聚合物改性水泥乳化沥青胶浆的抗压强度、弯曲抗折强度和变形等性能,并分析了不同配比下胶浆的单轴压缩应力应变曲线特征；研究了不同配合比下复合材料作为裂缝修补材料的弹性恢复率、粘结强度、高温流动性等路用性能；优化了适用于裂缝修补材料的配比,并将最优配合比下的复合材料与市售裂缝修补材料进行性能比较；通过微观实验观察复合材料的微观结构与各项性能之间的联系。研究结果表明：随着油灰比的增大,抗压强度、弯曲抗折强度、收缩都是不断减小,稠度为同水灰比下在一定范围内是增长的,随着聚灰比的增大,抗压强度在油灰比小的时候是降低,油灰比大时是增大的。弯曲抗折强度和弹性变形能力均呈现出增长的趋势,随着油灰比和聚灰比的增大,材料的韧性越来越好。复合材料随着油灰比的增大和聚灰比的增大,其弹性恢复率也在增加,粘结强度随着油灰比的增大而降低,复合材料中含有大量的水泥石束缚住沥青胶质的流动使得其高温稳定性能好,抵抗异物侵入性能较佳。当水灰比为0.45、聚灰比为0.2和油灰比为1时复合材料的各项路用性能指标满足规范对裂缝修补材料的要求,而且高温流动性和粘结强度都比普通裂缝修补材料变现优异,与市售材料进行性能对比其路用性能和性价比都存在优势。
[Abstract]:Most asphalt pavements in China have entered the peak period of maintenance and repair, among which cracks are the most important form of damage. Once the pavement cracks appear, not only destroy the integrity of the pavement structure, but also greatly reduce the driving comfort and safety, shorten the service life of the pavement, so it is necessary to repair the cracks in time. At present, there are shortcomings in performance and price of repair materials, so it is necessary to develop new high cost effective repair materials. In this paper, a new composite repair material was prepared by using emulsified asphalt and cement with high solid content (70.13) as the base material. The compressive strength, flexural flexural strength and deformation of polymer modified cement emulsified asphalt slurry under different ratio of cement to cement (0-0.2) and oil-cement ratio (0-1) were studied. The characteristics of uniaxial compression stress-strain curves were analyzed. The elastic recovery rate, bond strength and high temperature fluidity of composite materials used as crack repairing materials under different mix ratio were studied, and the ratio suitable for crack repair materials was optimized. The properties of the composites under the optimal mix ratio were compared with those of the commercial crack repair materials, and the relationship between the microstructure and the properties of the composites was observed by microscopic experiments. The results show that the compressive strength, bending flexural strength and shrinkage decrease with the increase of oil-cement ratio, and the consistency increases in a certain range under the same water-cement ratio, and increases with the increase of the aggregate cement ratio. The compressive strength decreases when the ratio of oil to cement is small and increases when the ratio of oil to cement is large. The flexural strength and elastic deformability show an increasing trend. With the increase of the ratio of oil to cement and the ratio of aggregate to cement, the toughness of the material becomes better and better. With the increase of the ratio of oil to cement and the ratio of aggregate to cement, the elastic recovery rate of the composite also increases, and the bond strength decreases with the increase of the ratio of oil to cement. The high temperature stability and the resistance to foreign body invasion of the composite materials are improved by the flow of asphalt resin bound by a large amount of cement stone. When the water-cement ratio is 0.45, the ratio of aggregate cement to cement is 0.2 and the ratio of oil to cement is 1, the road performance indexes of the composites meet the requirements of the specifications for crack repair materials, and the high temperature fluidity and bond strength are better than the ordinary crack repair materials. Compared with the commercial materials, its road performance and cost-performance have advantages.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

【相似文献】