建筑垃圾作为基层材料的轻交通量公路路面结构研究

发布时间：2017-12-26 20:44

  本文关键词：建筑垃圾作为基层材料的轻交通量公路路面结构研究　出处：《西南科技大学》2016年硕士论文　论文类型：学位论文

  更多相关文章： 建筑垃圾 轻交通量公路 基层 无侧限抗压强度 抗压回弹模量

【摘要】：随着城市建设的发展,大批旧建筑物被拆除,将产生大量的建筑垃圾,如何实现废弃资源的再利用,降低环境负荷,是我国环境保护和可持续发展的目标之一,也对构建和谐社会有很大的现实意义。因此本文的研究是将建筑垃圾应用到乡村公路、人行道、住宅小区道路等轻交通量公路工程路面基层上,不仅满足道路工程的质量要求,降低城市的建筑垃圾排放量,而且降低建筑垃圾对环境的污染,节约道路材料,降低工程费用,有利于社会经济的可持续性发展,具有重大的经济和社会效益。本文采用了室内试验和理论分析的两种方法对建筑垃圾的基本特性、建筑垃圾集料配合比、水泥稳定建筑垃圾混合料配合比、水泥稳定建筑垃圾力学性能以及基层厚度进行了比较系统的研究,研究成果为建筑垃圾在轻交通量公路基层的应用提供了理论依据和参考。主要研究内容和成果如下:(1)本文对建筑垃圾原材料物理力学性能以及破碎后的建筑垃圾基本特性进行了研究,得出建筑垃圾混凝土的集料压碎值小于30,满足《公路路面基层施工技术规范》(JTJ034—2000)规定的基层集料的压碎值不大于35%,而破碎后的废弃砖集料压碎值大于35%不满足要求,作为基层材料时需加入碎石或者建筑垃圾混凝土。(2)本文对建筑垃圾集料配合比进行了研究,通过对不同配合比的建筑垃圾集料进行了压碎值的测试得到废弃混凝土、废弃砖、少量碎石的适当的配合比范围。第一种:100%的废弃混凝土。第二种:废弃混凝土与废弃砖的比例为90:10。第三种:废弃混凝土:废弃砖:碎石的量为10:80:10,压碎值即可达到35%,满足规范要求。若要用到更高等级的道路中可以掺入更多的碎石。第四种:废弃砖与天然碎石的配比为90:10时,压碎值达到35%,即可满足规范要求。当废弃砖含量更高时,添加更多的碎石即可满足压碎值的要求。(3)对水泥稳定建筑垃圾混合料进行配合比设计进行了研究,通过击实试验和7d无侧限抗压强度试验在理论上证实了将建筑垃圾集料应用于轻交通量公路基层的这种思路是可行的,并且通过实验得到了水泥稳定建筑垃圾集料的配合比方案,本试验研究为推广建筑垃圾集料应用于轻交通量公路基层的起到了重要作用。(4)为了更好的评价建筑垃圾集料基层体系,为建筑垃圾集料在轻交通量公路路上的应用提供参考,对水泥稳定建筑垃圾力学性能进行了研究,讨论了多种因素对再生集料基层的影响,即不同水泥剂量、不同建筑垃圾集料种类、不同水泥强度对7d无侧限抗压强度的影响,以及无侧限抗压强度、间接抗拉强度、抗压回弹模量等长期力学性能随龄期的变化。得出四类建筑垃圾混合料,相同龄期下,不同水泥剂量的线性回归系数都在0.9以上,这说明四种建筑垃圾混合料的无侧限抗压强度、间接抗拉强度、抗压回弹模量性能都稳定,并且与水泥剂量呈线性关系。(5)本文对建筑垃圾作为轻交通量公路路面基层材料的基层厚度进行了计算研究,得出针对本文的轻交通量公路路面结构,推荐的水泥稳定建筑垃圾集料基层的厚度范围均为220mm~350mm。
[Abstract]:With the development of urban construction, a large number of old buildings will be demolished. A lot of construction waste will be generated. How to realize the reuse of waste resources and reduce environmental load is one of the goals of environmental protection and sustainable development in China, and also has great practical significance for building a harmonious society. Therefore this research is applied to rural highway construction waste, sidewalks, residential road light traffic highway pavement, not only meet the requirements of road engineering quality, reduce the amount of construction waste emissions of the city, and reduce construction waste pollution to the environment, saving road material, reduce the cost of the project, is conducive to sustainable the development of social economy, has great economic and social benefits. This paper adopts two methods of indoor experiment and theoretical analysis of the basic characteristics of the construction waste, construction waste aggregate ratio, cement stabilized construction waste mixture was systematically studied on cement stabilized construction waste ratio, mechanical properties and base thickness, the research for the application of construction waste in light traffic highway base to provide a theoretical basis and reference. The main research contents and results are as follows: (1) the basic characteristics of raw materials and mechanical properties after the break of the construction waste of construction waste was studied, the construction waste concrete aggregate crushing value is less than 30, to meet the "highway pavement construction technical specification" (JTJ034 - 2000) the provisions of the basic aggregate crushing the value is not greater than 35%, and the crushed waste brick aggregate crushing value greater than 35% does not meet the requirements as the base material without adding gravel or construction waste concrete. (2) in this paper, the mixture ratio of construction waste aggregate was studied, and the appropriate mix proportion of waste concrete, waste brick and a small amount of gravel was obtained through crushing value test of different construction materials. The first: 100% of the waste concrete. Second kinds: the proportion of waste concrete and abandoned brick is 90:10. Third kinds: Waste Concrete: waste brick: the amount of crushed stone is 10:80:10, and the crushed value can reach 35%, which meets the requirements of the standard. More gravel can be added to a higher grade road. The fourth: when the ratio of the abandoned brick and the natural gravel is 90:10, the crushing value is 35%, which can meet the requirements of the standard. When the content of the abandoned brick is higher, adding more gravel can meet the requirements of the crushing value. (3) of cement stabilized construction waste mixture mix design was studied by 7d compaction test and unconfined compressive strength tests were confirmed in theory the idea of building rubbish aggregate used in light traffic highway base is feasible, and obtained the cement stabilized construction waste collection the material proportioning scheme, the experimental study for the promotion of building rubbish aggregate used in light traffic highway base plays an important role. (4) in order to evaluate the building rubbish aggregate base system, to provide the reference material used in light traffic on the highway for construction waste, construction waste of cement stabilized mechanical properties were studied, the influence of various factors on the recycled aggregate base on different cement dosage, different construction waste in different aggregates the strength of the cement type, the impact of unconfined compressive strength of 7D, as well as the long-term unconfined mechanical properties of compressive strength, indirect tensile strength and compressive modulus changes with age. The four types of construction waste mixture, the same age, the linear regression coefficient of different cement dosage in more than 0.9, indicating that four kinds of unconfined compressive strength, modulus of resilience performance of indirect tensile strength, compressive stable building garbage mixture, and showed a linear relationship with the cement dosage. (5) in this paper, the base thickness of building waste as light traffic volume highway pavement base material is calculated and studied. It is concluded that for light traffic volume highway pavement structure recommended in this paper, the recommended thickness of cement stabilized building waste aggregate base is 220mm~350mm.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U416.2
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本文编号：1338804