沥青路面坑槽快速修补技术研究

发布时间：2018-09-08 16:03

【摘要】：目前,我国正处在城市现代化建设和公路交通发展的新时期,在公路通车总里程持续增加的同时,公路养护也逐渐成为公路建设中重要的一部分。坑槽是沥青路面上典型的病害之一,严重影响路面的行车安全性及舒适性。本文首先介绍了目前常用的用于沥青路面快速修补的方法和设备,比较了圆形坑槽修补比方形坑槽修补的优越性,并发明了一种圆形坑槽铣刨设备。其次,配制了2类沥青路面快速修补的材料,一类是以环氧树脂、固化剂、增柔剂、乳化沥青等为主要原料的环氧树脂类混合料,并根据结合料材料的不同,配制了改性环氧树脂混合料和环氧乳化沥青混合料,通过马歇尔试验法确定它们各自的最佳结合料用量为5.5%和5.1%;然后通过车辙试验、低温弯曲试验等测试表明,改性环氧树脂混合料和环氧乳化沥青混合料能快速高效的修补坑槽,且具有良好路用性能。一类是以偏高岭土及碱性激发剂和乳化沥青等为主要原料的超早强无机混合料,根据结合料中是否含有乳化沥青,分别制备含有乳化沥青的超早强无机混合料和未含有乳化沥青的超早强无机混合料,通过研究2种超早强无机混合料的成型法和养生方法,提出了此类混合料的设计方法;然后测试了2种混合料的抗压强度和抗压回弹模量,结果证明这2种超早强无机混合料是良好的沥青路面坑槽修补材料。最后,本文应用有限元分析软件对不同车轮荷载作用于不同位置下,不同路面坑槽挖补形状和不同力学性能的修补材料对沥青路面坑槽的力学分析的研究,根据研究结果对选择路面快速修补材料和修补工艺(形状和设备)提出建议。
[Abstract]:At present, our country is in the new period of urban modernization construction and highway traffic development. While the total mileage of highway traffic continues to increase, highway maintenance has gradually become an important part of highway construction. Pothole is one of the typical diseases on asphalt pavement, which seriously affects the driving safety and comfort of pavement. This paper first introduces the methods and equipment commonly used to repair asphalt pavement, compares the advantages of circular pit repair over square pit slot repair, and invents a circular pit milling and planing equipment. Secondly, two kinds of asphalt pavement materials are prepared, one is epoxy resin mixture with epoxy resin, curing agent, softener and emulsified asphalt as the main raw materials, and according to the different binder materials, The modified epoxy resin mixture and epoxy emulsified asphalt mixture were prepared, and their optimum binder contents were determined by Marshall test to be 5.5% and 5.1% respectively, and the rutting test and low-temperature bending test showed that, Modified epoxy resin mixture and epoxy emulsified asphalt mixture can quickly and efficiently repair potholes and have good road performance. One is the ultra-early strength inorganic mixture with metakaolin, alkaline activator and emulsified asphalt as the main raw materials, according to whether the binder contains emulsified asphalt, The ultra-early strength inorganic mixture containing emulsified asphalt and the ultra-early strength inorganic mixture without emulsified asphalt were prepared respectively. The design method of this kind of mixture was put forward by studying the molding method and health maintenance method of two kinds of ultra-early strength inorganic mixture. Then the compressive strength and modulus of resilience of two kinds of mixtures are tested. The results show that these two kinds of ultra-early strength inorganic mixtures are good materials for repairing asphalt pavement potholes. Finally, the finite element analysis software is used to study the mechanical analysis of asphalt pavement potholes under different wheel loads, different pothole shapes and different mechanical properties. Based on the results of the study, suggestions are made for the selection of pavement rapid repair materials and repair techniques (shape and equipment).
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U416.217;U418.6

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