贵州山区高速公路乳化沥青冷再生混合料高温性能研究
发布时间：2018-10-21 14:46
【摘要】：冷再生技术作为一种路面再生技术,能有效利用自然资源,降低工程造价和保护环境,具有可观的经济和环境效益,而被积极推广。沥青路面在使用过程中,受到温度及其他外荷载的作用会出现车辙等路面病害,研究乳化沥青冷再生混合料的高温性能对提高其高温稳定性,延长使用寿命有积极的意义。从影响冷再生混合料高温强度形成过程和高温稳定性能出发,本文主要采用试验与理论分析相结合的方法,分析了RAP料、乳化沥青掺量、水泥掺量和水用量等对冷再生料在高温时不同力学性能的影响。当前国内外对乳化沥青冷再生混合料高温稳定性的分析研究也较多,均重于某一个或几个方面,但是国内还没有成熟的介绍其在不同地区的可适用性的系统理论。本文主要依托“贵州省交通厅科技项目——山区高速公路沥青路面冷再生技术体系的研究”,通过从试验路段回收RAP,对RAP中的沥青和集料进行分析并评价其重复使用价值。因回收的沥青部分已开始老化,采用冷再生技术得到的新结合料在强度方面必然受到乳化沥青、RAP掺量以及水泥的影响,而这些材料有一定的温度敏感性,高温时会在不同程度上影响到冷再生混合料的强度和稳定性能,并且该作用会进一步反应在路面的使用过程中。在评价冷再生混合料高温稳定性的试验中,采用了国内普遍使用的车辙试验,分析温度、乳化沥青掺量、水泥用量以及基质沥青针入度的影响,采用蠕变试验分析混合料的车辙变形,找到提高乳化沥青冷再生混合料的高温时强度和稳定性的措施,减少或克服路面在高温条件使用时所产生的病害。影响乳化沥青冷再生料高温稳定性的因素众多,但针对贵州特殊的地理环境,本文分析得出主要是RAP掺量、乳化沥青和水泥用量在影响冷再生混合料高温性能,通过试验手段,可以获得适合当地的最优混合料配合比,以满足其在高温使用时对高温稳定性能的要求。
[Abstract]:As a kind of road surface regeneration technology, cold regeneration technology can effectively utilize natural resources, reduce engineering cost and protect environment. It has considerable economic and environmental benefits, and has been actively promoted. Pavement diseases such as rutting will occur during the use of asphalt pavement under the action of temperature and other external loads. It is of positive significance to study the high temperature performance of emulsified asphalt cold recycled mixture to improve its high temperature stability and prolong its service life. In order to influence the forming process of high temperature strength and stability of cold recycled mixture at high temperature, this paper mainly adopts the method of combining test and theoretical analysis to analyze the content of RAP compound and emulsified asphalt. The effects of cement content and water content on the mechanical properties of cold recycled materials at high temperature. At present, there are many researches on the high temperature stability of emulsified asphalt cold recycled mixture at home and abroad, which are more important than one or several aspects, but there is no mature system theory of its applicability in different areas in China. This paper mainly relies on the "Research on Cold Recycling Technology system of Asphalt pavement in mountainous area", which is a scientific and technological project of Guizhou Provincial Communications Department, analyzes bitumen and aggregate in RAP by recovering RAP, from experimental section and evaluates its reuse value. Due to the aging of the recovered asphalt, the strength of the new binder obtained by cold regeneration technology is bound to be affected by emulsified asphalt, RAP content and cement, and these materials have a certain temperature sensitivity. At high temperature, the strength and stability of cold recycled mixture will be affected in varying degrees, and the effect will be further reflected in the process of pavement use. In the test of evaluating the high temperature stability of cold recycled mixture, the rutting test, which is widely used in China, is used to analyze the effects of temperature, emulsified asphalt content, cement content and penetration of base asphalt. The creep test was used to analyze the rutting deformation of the mixture, and the measures to improve the strength and stability of the cold recycled asphalt mixture at high temperature were found to reduce or overcome the diseases caused by the pavement under the high temperature conditions. There are many factors that affect the high temperature stability of emulsified bitumen cold recycled mixture. However, in view of the special geographical environment in Guizhou, this paper analyzes that the content of RAP, emulsified asphalt and cement content affect the high temperature performance of cold recycled mixture. The optimum mixture ratio can be obtained to meet the requirement of high temperature stability.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414
本文编号：2285420
[Abstract]:As a kind of road surface regeneration technology, cold regeneration technology can effectively utilize natural resources, reduce engineering cost and protect environment. It has considerable economic and environmental benefits, and has been actively promoted. Pavement diseases such as rutting will occur during the use of asphalt pavement under the action of temperature and other external loads. It is of positive significance to study the high temperature performance of emulsified asphalt cold recycled mixture to improve its high temperature stability and prolong its service life. In order to influence the forming process of high temperature strength and stability of cold recycled mixture at high temperature, this paper mainly adopts the method of combining test and theoretical analysis to analyze the content of RAP compound and emulsified asphalt. The effects of cement content and water content on the mechanical properties of cold recycled materials at high temperature. At present, there are many researches on the high temperature stability of emulsified asphalt cold recycled mixture at home and abroad, which are more important than one or several aspects, but there is no mature system theory of its applicability in different areas in China. This paper mainly relies on the "Research on Cold Recycling Technology system of Asphalt pavement in mountainous area", which is a scientific and technological project of Guizhou Provincial Communications Department, analyzes bitumen and aggregate in RAP by recovering RAP, from experimental section and evaluates its reuse value. Due to the aging of the recovered asphalt, the strength of the new binder obtained by cold regeneration technology is bound to be affected by emulsified asphalt, RAP content and cement, and these materials have a certain temperature sensitivity. At high temperature, the strength and stability of cold recycled mixture will be affected in varying degrees, and the effect will be further reflected in the process of pavement use. In the test of evaluating the high temperature stability of cold recycled mixture, the rutting test, which is widely used in China, is used to analyze the effects of temperature, emulsified asphalt content, cement content and penetration of base asphalt. The creep test was used to analyze the rutting deformation of the mixture, and the measures to improve the strength and stability of the cold recycled asphalt mixture at high temperature were found to reduce or overcome the diseases caused by the pavement under the high temperature conditions. There are many factors that affect the high temperature stability of emulsified bitumen cold recycled mixture. However, in view of the special geographical environment in Guizhou, this paper analyzes that the content of RAP, emulsified asphalt and cement content affect the high temperature performance of cold recycled mixture. The optimum mixture ratio can be obtained to meet the requirement of high temperature stability.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414
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