南宁外环沥青混合料变异性研究

发布时间：2018-11-18 06:56

【摘要】：沥青路面具有行车舒适、易于机械化施工且修建速度快、维修便捷等优点,因此目前国内外公路建设主要以沥青路面为主。而大部分沥青路面的使用性能与寿命都不容乐观。随着交通量的增长及重载车的增多,对沥青路面的整体质量,特别是投入使用的前期性能要求越来越高。目前国内的规范给予的各种级配范围都是固定的且范围较广。按照规范设计并施工出来的许多沥青路面会出现渗水、高温稳定性不足等病害及问题。因此,优化级配以及更合理地确定级配设计参数是一个亟待解决的问题。另外,规范内对沥青混合料级配设计参数的控制范围较广。全国各地不管任何地域或是气候条件都按照现行规范给出的要求进行质量控制。这就会出现即使某些地区建成的沥青路面许多指标都满足规范要求仍会出现问题。针对不同地区限制各级配设计参数的范围也成为一项需要解决的问题。文章依托广西南宁外环沥青路面工程,结合南宁当地的矿质集料和AC-25、AC-20、AC-13沥青混合料级配,研究分析了集料级配的设计与优化过程。同时分析了影响沥青混合料几何参数与各性能指标的影响因子,从而提出了更明确的级配设计范围。这提高了AC型沥青混合料的总体设计水平,同时对施工质量控制也有一定的指导作用。本文还分析了材料变异性对级配设计参数的影响,在确定各参数的时候将变异性考虑进去能更加精确的设计出满足路用性能的高等级路面。本文的研究内容主要针对广西地区的沥青路面。争取在规范的基础之上力求寻找更加适合广西地区的级配范围,并更加精确地确定级配以及级配设计参数的范围,从而提高广西地区沥青路面的路用性能、施工质量以及管理水平。
[Abstract]:Asphalt pavement has the advantages of comfortable driving, easy mechanization construction, fast construction, convenient maintenance and so on. Therefore, at present, asphalt pavement is mainly used in highway construction at home and abroad. However, the performance and service life of most asphalt pavement are not optimistic. With the increase of traffic volume and the increase of heavy-duty vehicles, the overall quality of asphalt pavement, especially the early performance of the asphalt pavement, is becoming more and more important. At present, the domestic norms give a variety of grading range is fixed and a wide range. Many asphalt pavement designed and constructed according to the specifications will have water seepage, low high temperature stability and other diseases and problems. Therefore, it is an urgent problem to optimize gradation and determine the design parameters of gradation more reasonably. In addition, the design parameters of asphalt mixture gradation are controlled widely in the specification. All parts of the country, regardless of geographical or climatic conditions, are in accordance with the requirements of the current regulations for quality control. This will cause problems even if many of the specifications of asphalt pavement built in some areas meet the requirements of the specifications. Limiting the range of design parameters for different regions has also become a problem to be solved. In this paper, the design and optimization process of aggregate gradation is studied and analyzed based on Guangxi Nanning Outer Ring Asphalt pavement Engineering, combined with the local mineral aggregate and AC-25,AC-20,AC-13 asphalt mixture gradation. At the same time, the influence factors on the geometric parameters and performance indexes of asphalt mixture are analyzed, and a more definite range of gradation design is put forward. This improves the overall design level of AC asphalt mixture and has a certain guiding effect on construction quality control. This paper also analyzes the influence of material variability on the gradation design parameters. When determining the parameters, the variability can be taken into account to design the high-grade pavement that meets the road performance more accurately. The research content of this paper is mainly aimed at the asphalt pavement in Guangxi. Striving to find a more suitable gradation range for Guangxi on the basis of specifications, and to determine more accurately the gradation and the range of gradation design parameters, so as to improve the road performance of asphalt pavement in Guangxi, Construction quality and management level.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

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