武吉高速公路沥青路面就地热再生混合料配合比设计与性能研究

发布时间：2018-03-18 05:23

本文选题：旧沥青混合料　切入点：就地热再生　出处：《南昌大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来,我国高速公路快速发展,高速公路里程已经位居世界第一,随之而来的养护压力日增。高速公路路面采用沥青混凝土路面,养护工程产生大量旧沥青混合料,如果处理不当就会造成环境污染,也是对资源的一种浪费。目前,我国交通行业秉持“保护环境、节约资源”的发展理念,对资源的循环利用已成为必然选择。旧沥青混合料的回收再利用既节约了资源,又保护了环境,其中就地热再生技术具有施工时间短、对交通干扰小等特点,已在全国范围内得到逐步推广利用,并取得良好成效。旧沥青混合料的再利用的关键技术在于沥青混合料配合比设计以及对其路用性能的评价。本文以武吉高速公路路面养护工程项目为实例对这一技术进行实证研究。本研究对武吉高速公路养护工程进行了现场钻芯取样,对旧沥青混合料的集料和沥青性能进行检测与评价,并分析新沥青与再生剂对RAP料的改善效果;按照设计标准进行新沥青混合料配合比设计、试配,分析拌合温度、时间、RAP料破碎程度对新沥青混合料的影响,确定矿料级配、沥青最佳含量和再生剂掺量,并评价新沥青混合料的性能,并分析了施工工艺流程与质量控制措施。研究表明,沥青路面就地热再生技术适用于沥青路面轻微病害处治;新沥青和添加剂有改善RAP料性能的作用,在武吉高速公路养护工程中,新沥青最佳含量为4.4~4.6%,再生剂掺量在1%~3%之间较为合适;拌合温度和拌合时间对再生沥青混合料性能影响程度较大,RAP混合料破碎程度对其影响较小。
[Abstract]:In recent years, with the rapid development of expressway in China, the mileage of expressway has already ranked first in the world, and the maintenance pressure is increasing. If it is not handled properly, it will cause environmental pollution and is also a waste of resources. At present, China's transportation industry adheres to the development concept of "protecting the environment and saving resources". Recycling of resources has become an inevitable choice. The recovery and reuse of old asphalt mixture not only saves resources, but also protects the environment. Among them, geothermal regeneration technology has the characteristics of short construction time and little traffic interference. Has been gradually extended throughout the country, The key technology for the reuse of old asphalt mixture lies in the mix design of asphalt mixture and the evaluation of its road performance. This paper takes the pavement maintenance project of Wuji Expressway as an example. This research has carried on the spot drilling core sampling to the Wuji expressway maintenance project, This paper tests and evaluates the aggregate and asphalt performance of old asphalt mixture, analyzes the improvement effect of new asphalt and regenerative agent on RAP mixture, designs the mix proportion of new asphalt mixture according to the design standard, and analyzes the mixing temperature. The influence of the crushing degree of rap on the new asphalt mixture, the determination of the gradation of mineral aggregate, the optimum content of asphalt and the amount of recycled agent, the evaluation of the performance of the new asphalt mixture, and the analysis of the construction process and quality control measures are presented. The new asphalt and additives have the function of improving the performance of RAP, and in the maintenance project of Wuji Expressway, new asphalt and additives are suitable for the treatment of minor diseases of asphalt pavement. The optimum content of new asphalt is 4.4 ~ 4.6 and the amount of regenerating agent is between 1% and 3%, and the influence of mixing temperature and mixing time on the performance of recycled asphalt mixture is greater than that of rap mixture.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U414

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