冷补环氧乳化沥青混合料研究

发布时间：2018-03-15 11:19

本文选题：环氧乳化沥青　切入点：强度增长规律　出处：《长安大学》2015年硕士论文　论文类型：学位论文

【摘要】：近年来,交通行业迅速发展的同时也出现了诸多问题,很多已建成通车的道路在远没有到达设计年限就出现诸如开裂、车辙、松散剥落、坑槽等病害,因此,加大对现有路面的养护和维修具有非常重要的现实意义。以乳化沥青作为结合料的路面修护技术,具有常温可拌和、易于施工、节能减排、延长施工季节等优点,但以乳化沥青拌制的混合料粘结性较差、强度成型慢、早期强度低且成型强度相比于热拌沥青混合料也大打折扣,因此并没有大范围推广使用。为弥补乳化沥青的缺点,本课题将水性环氧树脂加入到乳化沥青中,以期改善乳化沥青粘结性差、强度低的缺点,发挥水性环氧树脂粘结力强、成型速度快且强度高的优点,从而制得一种快修补、低能耗的路面修补材料。课题选择了两种水性环氧树脂及两种固化剂进行试验研究,通过测定水性环氧树脂的环氧值和固体含量,计算得到固化剂理论最佳掺量;通过测定不同固化剂掺量下不同养生龄期的水性环氧砂浆抗压强度,得到固化剂的最佳掺量;通过测定两种水性环氧树脂在最佳固化剂掺量条件下,水性环氧砂浆强度随温度变化的强度增长规律,得到温度对于水性环氧树脂固化速度的影响规律;通过水性环氧砂浆的抗弯拉试验,得到两种环氧树脂在固化剂最佳掺量条件下的抗弯拉强度及应力应变曲线,得到两种水性环氧树脂的差异,即一种为柔性环氧,一种为刚性环氧。课题在分析乳化沥青破乳机理及水性环氧树脂固化机理的基础上,结合热拌沥青混合料摩尔-库伦理论,分析了环氧乳化沥青混合料强度形成机理及强度形成特点。课题基于交通部阳离子课题协作组推荐的阳离子乳化沥青混合料配合比设计方法,对环氧乳化沥青混合料进行了配合比设计,并对混合料的击实成型方法、养生条件进行了试验研究,提出了用于道路坑槽修补的环氧乳化沥青混合料初期强度和成型强度的评价方法;课题通过对比不同类型的混合料的车辙试验、低温弯曲蠕变试验、残留稳定度试验、冻融劈裂试验、粘附性试验结果,对混合料的高温性能、低温性能和水稳定性进行了验证分析。试验研究表明,以环氧乳化沥青混合料作为路面修补材料,路用性能优异,且有利于节能减排、提高路面服务水平,创造更大的经济效益和社会效益。
[Abstract]:In recent years, along with the rapid development of the transportation industry, there have also been many problems. Many roads that have been built and opened to traffic appear diseases such as cracking, rutting, loose spalling, potholes and so on, far from reaching the design time. It is of great practical significance to increase the maintenance and maintenance of the existing pavement. The pavement repair technology with emulsified asphalt as the binder has the advantages of mixing at room temperature, easy construction, energy saving and emission reduction, prolonging the construction season, etc. However, the mixture mixed with emulsified asphalt has poor adhesive property, slow strength forming, low early strength and lower formability compared with hot mix asphalt mixture, so it has not been widely used to make up for the shortcomings of emulsified asphalt. In this paper, waterborne epoxy resin is added to emulsified asphalt in order to improve the disadvantages of poor adhesion and low strength of emulsified asphalt, and give full play to the advantages of strong adhesion, fast molding speed and high strength of waterborne epoxy resin. In this paper, two kinds of waterborne epoxy resin and two curing agents are selected for experimental study. The optimum content of curing agent theory is calculated by measuring epoxy number and solid content of waterborne epoxy resin. By measuring the compressive strength of waterborne epoxy mortar with different curing agents and different curing ages, the optimum amount of curing agent was obtained, and the optimum content of two kinds of waterborne epoxy resin was determined under the optimum curing agent content. The influence of temperature on curing speed of waterborne epoxy mortar was obtained by increasing the strength of waterborne epoxy mortar with the change of temperature, and the flexural and tensile tests of waterborne epoxy mortar were carried out. The curves of flexural tensile strength and stress-strain of two kinds of epoxy resin under the optimum content of curing agent were obtained. The difference between two kinds of waterborne epoxy resin was obtained, that is, the flexible epoxy resin. One is rigid epoxy resin. Based on the analysis of emulsified asphalt demulsification mechanism and waterborne epoxy resin curing mechanism, combining with the molar Coulomb theory of hot mix asphalt mixture, The strength forming mechanism and strength forming characteristics of epoxy emulsified asphalt mixture are analyzed. The mixture ratio of epoxy emulsified asphalt mixture is designed, and the compaction molding method and health condition of the mixture are studied experimentally. The evaluation method of initial strength and forming strength of epoxy emulsified asphalt mixture used for road pothole repair is put forward, and the rutting test, low temperature bending creep test, residual stability test of different kinds of mixture are compared. The results of freeze-thaw splitting test and adhesion test are used to verify and analyze the high temperature performance, low temperature performance and water stability of the mixture. The experimental results show that the epoxy emulsified asphalt mixture is used as the pavement repair material, and the pavement performance is excellent. It is beneficial to save energy and reduce emission, improve pavement service level, and create more economic and social benefits.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

【相似文献】