多孔沥青路面路用性能的衰变特性研究

发布时间：2018-01-05 09:35

本文关键词：多孔沥青路面路用性能的衰变特性研究　出处：《东南大学》2015年硕士论文　论文类型：学位论文

【摘要】：多孔沥青路面是一种大空隙骨架结构的路面,其空隙率为20%左右。这种大空隙结构使得路面具有很好的连通空隙,改善了路面的排水性能,有利于雨天的行车安全。大空隙结构同时增加了路面的构造深度,有利于提高抗滑性能,并具有降温和降噪的功能。随着多孔沥青路面在世界各国的广泛应用,其使用过程中的路用性能的下降越来越受到重视。本文对多孔沥青路面的功能性能和耐久性能两个方面的影响因素进行了分析,考虑使用空隙率作为路面功能性能衰变的特征变量,根据多孔沥青路面使用的环境特点,考虑沥青老化和冲刷为路面耐久性的关键影响因素。依托上海五洲大道的实体工程,本文分析了空隙率和有效空隙的关系,以及多孔沥青路面对材料及配合比设计的要求。在此基础上,设计了不同空隙率下的级配和油石比,并分析了多孔沥青混合料的力学性能和空隙率的关系。针对多孔沥青路面空隙的衰变,本文分别分析了荷载压密以及堵塞作用造成的空隙损失。其中,堵塞是造成空隙损失的主要原因。随后,本文以不同的空隙率(18%-22%)的混合料为研究对象,通过室内试验的方法分析了多孔沥青路面在使用过程中的功能性能衰变,包括排水性能、抗滑性能和抗堵塞性能；以沥青的加速老化和动水冲刷为手段,分析了沥青老化和冲刷对耐久性能的影响,包括低温稳定性、水稳定性和抗疲劳性能。研究的结果表明,随着空隙率的衰变,多孔沥青路面的功能性能逐渐下降,其中,排水性能和抗堵塞性能下降最为明显。而多孔沥青路面的耐久性受到沥青老化和冲刷的影响而下降。综合本文的研究成果,为了保证多孔沥青路面的正常使用,原则上要求多孔沥青路面的空隙率在18%以上。另外,对使用中的多孔沥青路面应定期清洗路面结构中的堵塞杂物,当空隙率衰变到20%以下时,路面的抗滑性能和抗堵塞性能损失较大,应该清洗维护路面结构。
[Abstract]:Porous asphalt pavement is a kind of pavement with large void skeleton structure and its void ratio is about 20%. This kind of large void structure makes the pavement have very good connected voids and improves the drainage performance of pavement. The large void structure increases the structure depth of the pavement at the same time, and improves the anti-skid performance, and has the function of cooling down and reducing noise. With the wide application of porous asphalt pavement in the world. More and more attention has been paid to the deterioration of road performance in the course of use. This paper analyzes the two factors which affect the functional performance and durability of porous asphalt pavement. Considering the void ratio as the characteristic variable of pavement functional performance decay, according to the environmental characteristics of porous asphalt pavement. Considering asphalt aging and scouring as the key factors affecting pavement durability, this paper analyzes the relationship between void ratio and effective void based on the solid engineering of Shanghai Wuzhou Avenue. On the basis of this, gradation and oil stone ratio under different voids are designed. The relationship between mechanical properties and void ratio of porous asphalt mixture is analyzed. According to the decay of porous asphalt pavement voids, the void losses caused by load compaction and blockage are analyzed respectively. Plugging is the main cause of void loss. Subsequently, the mixture with different void ratio (18- 22) is taken as the research object. The decay of the function of porous asphalt pavement in the process of using is analyzed by the method of laboratory test, including drainage performance, anti-skid performance and anti-clogging performance. The effects of asphalt aging and erosion on durability, including low temperature stability, water stability and fatigue resistance, were analyzed by means of accelerated aging and hydrodynamic scouring of asphalt. With the decay of voids, the function of porous asphalt pavement decreases gradually. The deterioration of drainage performance and anti-blocking performance is most obvious, while the durability of porous asphalt pavement is affected by asphalt aging and scouring. In order to ensure the normal use of porous asphalt pavement, the paper synthesizes the research results. In principle, the void ratio of porous asphalt pavement should be more than 18%. In addition, the porous asphalt pavement in use should be cleaned regularly to block debris in the pavement structure, when the void ratio decay below 20%. The road surface should be cleaned and maintained because of its large loss of anti-skid and anti-clogging performance.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

【相似文献】