高速公路沥青混凝土路面病害预防措施研究

发布时间：2019-05-30 03:09

【摘要】：近年来,随着我国经济的发展以及国家对基础建设的大力投入,高速公路的建设出现了蓬勃发展的景象。与此同时,沥青路面的早期损坏也同样严重。就目前的情况来看,路面的早期损坏已经对国家造成了巨大的经济损失,同时也给人们的出行带来了很多的不变。因此,对沥青混凝土路面进行病害的早期预防具有重大的现实意义。为了使上述问题得到解决,本文结合具体工程项目并且在总结前人研究的基础之上,从以下三个方面入手:第一,探究了集料的压碎值、磨耗值大小分别对混合料路用性能的影响。提出了能够使混合料具有高性能表现的合理范围,找出了更加适合本地区使用的集料,从集料选用的角度出发提升沥青混合料抗车辙的能力,从而达到对沥青路面早期高温车辙病害的预防。第二,采用经过挑选的集料进行配合比优化设计,分析对比试验结果,以优良的路用性能为评价指标挑选适合的关键筛孔的通过率。试验结果表明,关键筛孔的通过率对沥青混合料性能有重要的影响,采用优化过的级配能够使沥青混合料的各种性能得到提高。第三,科学合理的施工方案、严谨规范的施工技术都是获得质量优良路面的重要措施。从沥青混合料的拌合、级配及温度的离析、路面渗水的预防、施工污染的控制、集料碾压破碎等施工问题着手,提出改进措施,从而确保了施工质量,进而对路面车辙病害、水损坏以及裂缝等早期病害进行了预防。本文最后进行试验路的铺筑,沥青混合料各种性能指标均能满足规范的要求,高温稳定性和水稳定性尤其明显,很好的验证了本文所提出的相关结论。同时,本文的相关结论也为推动当地高速公路沥青路面病害预防的发展起到了一定的作用。
[Abstract]:In recent years, with the development of economy in our country and the great investment of the state in infrastructure construction, the construction of expressway has developed vigorously. At the same time, the early damage of asphalt pavement is also serious. As far as the current situation is concerned, the early damage of the road has caused huge economic losses to the country, but also brought a lot of constant changes to people's travel. Therefore, the early prevention of asphalt concrete pavement disease is of great practical significance. In order to solve the above problems, combined with the specific engineering projects and on the basis of summing up the previous studies, this paper starts from the following three aspects: first, the crushing value of aggregates is explored. The effect of wear value on the pavement performance of the mixture. This paper puts forward a reasonable range which can make the mixture have high performance, finds out the aggregates which are more suitable for use in this area, and improves the rut resistance of asphalt mixture from the point of view of aggregate selection. In order to achieve the prevention of early high temperature rut disease of asphalt pavement. Secondly, the selected aggregate is used to optimize the mix proportion design, and the test results are analyzed and compared. the pass rate of the suitable key screen hole is selected by taking the excellent road performance as the evaluation index. The test results show that the pass rate of key screen holes has an important influence on the performance of asphalt mixture, and the performance of asphalt mixture can be improved by using the optimized gradation. Third, scientific and reasonable construction scheme and rigorous and standardized construction technology are important measures to obtain high quality pavement. Starting from the construction problems such as mixing of asphalt mixture, gradation and temperature segregation, prevention of pavement seepage, control of construction pollution, aggregate rolling and crushing, etc., the improvement measures are put forward, so as to ensure the construction quality and then to the rut disease of pavement. Early diseases such as water damage and cracks were prevented. At the end of this paper, the paving of the test road, all kinds of performance indexes of asphalt mixture can meet the requirements of the code, especially the high temperature stability and water stability, which verifies the relevant conclusions put forward in this paper. At the same time, the relevant conclusions of this paper also play a certain role in promoting the development of local highway asphalt pavement disease prevention.
【学位授予单位】：西安工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U418.6

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