贵州省黔西南州农村公路沥青路面热再生技术应用研究

发布时间：2018-04-18 03:34

本文选题：沥青路面热再生 + RAP料　；参考：《重庆交通大学》2014年硕士论文

【摘要】：沥青路面在长期使用过程中，经过交通荷载及自然因素的作用，逐渐老化变硬。具体表现为沥青变得硬脆，延伸性降低，从而导致沥青路面产生裂缝、坑槽、松散等各种形式的破坏。因此，沥青路面使用一定年限后必须进行大、中修处理。随着沥青路面养护和大、中修工程量不断增加，产生了大量的废旧沥青混合料，废料的堆放和掩埋会对环境造成极大破坏。同时，道路用沥青主要来源于石油工业，地球上石油的存储量也日趋减少；在许多国家，自矿山开采法颁布实施以来，，石料的生产也受到极大的限制。因此，开展沥青路面再生技术的应用研究是十分必要的。我国《公路沥青路面再生技术规范》的颁布实施，进一步规范了沥青路面再生技术的实际应用，保证了再生沥青路面的工程质量。但是，《公路沥青路面再生技术规范》只是针对高等级公路的沥青路面再生作出了一些说明和要求，对低等级公路沥青路面再生没有明确的指导性。同样，规范中要求沥青路面厂拌热再生对回收沥青路面材料（RAP料）的掺配比例较小，且再生混合料只能用于高等级公路的中下面层及基层。这种针对高等级公路的沥青路面再生指标不能同等适用于低等级公路的沥青路面再生。本文依托贵州省黔西南州兴天公路中修工程，通过对原路面的调查和铣刨得到旧沥青路面材料（RAP料），并且对RAP料的预处理和管理进行了规范，同时检测了RAP料中沥青和集料的性能。本文归纳总结了沥青再生机理的研究，开展了沥青再生剂再生效果的评价，确定了再生剂的最佳用量。配合比设计方面，在尽可能提高RAP料掺配比例的基础上进行再生沥青混合料配合比设计，并对再生沥青混合料的路用性能进行了测试分析。另外，本文结合实际工程对沥青路面热再生的施工工艺进行了研究，同时对沥青路面再生的经济效益进行了评价。通过对低等级公路沥青路面再生技术的应用研究，进一步确定了RAP材料100%回收利用的可行性以及再生沥青混合料用在低等级公路表面层的可行性，对沥青路面再生技术在低等级公路上的应用做出了指南。
[Abstract]:During the long-term use of asphalt pavement, it is gradually aging and hardening through the action of traffic load and natural factors.The concrete performance is that asphalt becomes hard and brittle, and its extensibility decreases, which leads to cracks, potholes, loose and other forms of destruction of asphalt pavement.Therefore, asphalt pavement must be treated with large and medium repair after a certain number of years.With the maintenance and large amount of asphalt pavement, the quantity of medium repair works is increasing, and a large amount of waste asphalt mixture is produced, which will cause great damage to the environment.At the same time, the road asphalt mainly comes from the petroleum industry, and the storage of oil on the earth is decreasing day by day. In many countries, the production of stone has been greatly restricted since the promulgation and implementation of mining law.Therefore, it is necessary to study the application of asphalt pavement regeneration technology.The promulgation and implementation of the Technical Specification for Asphalt pavement Regeneration in China has further standardized the practical application of the asphalt pavement regeneration technology and ensured the engineering quality of the recycled asphalt pavement.However, the Technical Specification for Asphalt pavement Regeneration of Highway is only for the asphalt pavement regeneration of high-grade highway to make some instructions and requirements, and there is no clear guidance for the regeneration of asphalt pavement of low-grade highway.Similarly, it is required in the specification that the proportion of recycled asphalt pavement material (rap) is small, and the recycled mixture can only be used in the middle and lower layers and the base course of high grade highway.This kind of asphalt pavement regeneration index for high-grade highway can not be applied to the asphalt pavement regeneration of low-grade highway.Based on the medium repair project of Xingtian Highway in Qianxinan Prefecture, Guizhou Province, this paper obtains the old asphalt pavement material rap through the investigation and milling of the original pavement, and standardizes the pretreatment and management of the RAP material.At the same time, the properties of asphalt and aggregate in RAP were tested.In this paper, the research on the mechanism of asphalt regeneration is summarized, and the evaluation of the regeneration effect of asphalt regenerating agent is carried out, and the optimum amount of the regenerating agent is determined.On the basis of increasing the proportion of RAP admixture as far as possible, the mix ratio of recycled asphalt mixture is designed, and the road performance of recycled asphalt mixture is tested and analyzed.In addition, this paper studies the construction technology of asphalt pavement thermal regeneration combined with actual engineering, and evaluates the economic benefit of asphalt pavement regeneration.The feasibility of 100% recycling of RAP material and the feasibility of using recycled asphalt mixture in surface layer of low grade highway are further determined through the application research of asphalt pavement regeneration technology in low grade highway.The application of asphalt pavement regeneration technology in low-grade highway is given.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.217

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