新疆厂拌热再生混合料配合比质量控制与性能评价
发布时间：2018-08-09 07:04
【摘要】：沥青路面再生技术的应用,极大的减少了资源的浪费,具有很大的经济效益与社会效益。本论文依托新疆“低温环境下大比例掺量废旧沥青混合料再生关键技术研究”开展研究,通过对旧沥青混合料性能评价、混合料级配变异性控制以及旧沥青再生性能的研究,分析旧沥青混合料的再生性能,探究其再生效率,提出相应的控制标准。第一,对依托新疆项目的旧路进行实地调查,了解原路面的主要病害,以及病害成因。同时对项目所在地的水文气候状况进行调查,为进行厂拌热再生做前期资料准备。第二,对采用的新集料与旧沥青混合料的各项指标进行检测。本文结合旧沥青混合料级配变异性分析,对原路面沥青混合料进行破碎与筛分,然后研究沥青混合料分档后的变异情况。通过研究混合料分为两档与三档的级配变异情况,确定了最终的分档。采用科学的计算方法得出各档的掺配比例,使旧沥青混合料得到了充分利用。第三,分析了新沥青与再生剂对旧沥青性能恢复的情况,在此基础上确定了再生剂的种类与最佳掺量。通过旧沥青与新沥青溶合后再生沥青的性能,模拟再生过程中新沥青对旧沥青的再生恢复情况。通过拟定不同的试验条件(拌合时间、旧料预热温度与是否添加再生剂)来进行旧沥青再生利用率的研究,分析了再生混合料中旧沥青的利用程度,并且提出了旧料的最佳预热温度和拌合时间。结合旧沥青再生利用率结果,进行旧沥青混合料沥青膜的研究,分析新集料与旧集料表面沥青膜的存在状态。第四,根据新沥青对旧沥青的再生情况,找出能使再生沥青混合料中旧沥青性能恢复的最低新旧沥青比,从而确定旧沥青混合料的最大掺配比例。对比传统沥青混合料设计方法,本文采用新了设计方法来进行再生沥青混合料的配合比设计,充分考虑了各分档的沥青含量以及旧沥青的再生效率。以马歇尔试验确定了最佳沥青含量,测试了再生混合料的高温稳定性、水稳性、低温稳定性。第五,进行热再生沥青混合料经济性分析,结果表明沥青路面再生技术的运用,具有显著的经济与社会效益。
[Abstract]:The application of asphalt pavement regeneration technology greatly reduces the waste of resources and has great economic and social benefits. In this paper, based on the "Research on key Technology of recycled Asphalt mixture with large proportion of waste Asphalt mixture in low temperature Environment" in Xinjiang, through the performance evaluation of old asphalt mixture, the control of mixture gradation variability and the research of recycled performance of old asphalt mixture. This paper analyzes the recycled performance of old asphalt mixture, probes into its recycling efficiency, and puts forward the corresponding control standard. First, carry on the field investigation to the old road that rely on the Xinjiang project, understand the main disease of the original road surface, as well as the cause of the disease. At the same time, the hydrological and climatic conditions of the site of the project were investigated to prepare the preliminary data for plant heating regeneration. Secondly, the indexes of new aggregate and old asphalt mixture are tested. Based on the analysis of gradation variability of old asphalt mixture, the original pavement asphalt mixture is broken and sifted, and the variation of asphalt mixture after grading is studied in this paper. The final gradation is determined by studying the gradation variation of mixture divided into two and three stages. By using scientific calculation method, the blending ratio of each grade is obtained, which makes full use of the old asphalt mixture. Thirdly, the performance recovery of new asphalt and regenerative agent to old asphalt is analyzed. On the basis of this, the types and optimal dosage of regenerating agent are determined. Through the performance of reclaimed asphalt after blending old asphalt with new asphalt, the regeneration recovery of old asphalt during regeneration process was simulated. By drawing up different test conditions (mixing time, preheating temperature of used materials and adding regenerating agent or not) to study the utilization ratio of old asphalt, the utilization degree of old asphalt in recycled mixture was analyzed. The optimum preheating temperature and mixing time of the used materials are also put forward. Based on the results of recycled utilization of old asphalt, the asphalt film of old asphalt mixture is studied, and the existing state of asphalt film on the surface of new aggregate and old aggregate is analyzed. Fourthly, according to the regeneration of old asphalt by new asphalt, we find out the lowest ratio of old and new asphalt which can restore the performance of old asphalt in recycled asphalt mixture, so as to determine the maximum mix proportion of old and old asphalt mixture. Compared with the traditional asphalt mixture design method, this paper adopts a new design method to design the mix ratio of recycled asphalt mixture, and fully considers the asphalt content of each grade and the recycling efficiency of old asphalt. The optimum asphalt content was determined by Marshall test, and the high temperature stability, water stability and low temperature stability of recycled mixture were tested. Fifth, the economic analysis of hot recycled asphalt mixture shows that the application of asphalt pavement recycling technology has remarkable economic and social benefits.
【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：2173289
[Abstract]:The application of asphalt pavement regeneration technology greatly reduces the waste of resources and has great economic and social benefits. In this paper, based on the "Research on key Technology of recycled Asphalt mixture with large proportion of waste Asphalt mixture in low temperature Environment" in Xinjiang, through the performance evaluation of old asphalt mixture, the control of mixture gradation variability and the research of recycled performance of old asphalt mixture. This paper analyzes the recycled performance of old asphalt mixture, probes into its recycling efficiency, and puts forward the corresponding control standard. First, carry on the field investigation to the old road that rely on the Xinjiang project, understand the main disease of the original road surface, as well as the cause of the disease. At the same time, the hydrological and climatic conditions of the site of the project were investigated to prepare the preliminary data for plant heating regeneration. Secondly, the indexes of new aggregate and old asphalt mixture are tested. Based on the analysis of gradation variability of old asphalt mixture, the original pavement asphalt mixture is broken and sifted, and the variation of asphalt mixture after grading is studied in this paper. The final gradation is determined by studying the gradation variation of mixture divided into two and three stages. By using scientific calculation method, the blending ratio of each grade is obtained, which makes full use of the old asphalt mixture. Thirdly, the performance recovery of new asphalt and regenerative agent to old asphalt is analyzed. On the basis of this, the types and optimal dosage of regenerating agent are determined. Through the performance of reclaimed asphalt after blending old asphalt with new asphalt, the regeneration recovery of old asphalt during regeneration process was simulated. By drawing up different test conditions (mixing time, preheating temperature of used materials and adding regenerating agent or not) to study the utilization ratio of old asphalt, the utilization degree of old asphalt in recycled mixture was analyzed. The optimum preheating temperature and mixing time of the used materials are also put forward. Based on the results of recycled utilization of old asphalt, the asphalt film of old asphalt mixture is studied, and the existing state of asphalt film on the surface of new aggregate and old aggregate is analyzed. Fourthly, according to the regeneration of old asphalt by new asphalt, we find out the lowest ratio of old and new asphalt which can restore the performance of old asphalt in recycled asphalt mixture, so as to determine the maximum mix proportion of old and old asphalt mixture. Compared with the traditional asphalt mixture design method, this paper adopts a new design method to design the mix ratio of recycled asphalt mixture, and fully considers the asphalt content of each grade and the recycling efficiency of old asphalt. The optimum asphalt content was determined by Marshall test, and the high temperature stability, water stability and low temperature stability of recycled mixture were tested. Fifth, the economic analysis of hot recycled asphalt mixture shows that the application of asphalt pavement recycling technology has remarkable economic and social benefits.
【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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