城市建筑废弃物的综合处理与利用研究

发布时间：2018-08-07 21:11

【摘要】：据最新统计结果显示,我国每年的建筑施工面积已超过6.5亿平方米,引发的结果是建筑垃圾也日与俱增。目前,我国每年建筑垃圾的数量占城市年垃圾总量较大的比例,已经成为如何妥善处理的难题。就目前而言,绝大部分的建筑垃圾均未经过任何处理被运到郊外或乡村,采用露天堆放或填埋的方式进行处理。这种处理方式不但占用了大量的耕地和建筑资金,而且在清运和堆放过程中产生的遗撒和粉尘、灰尘飞扬等问题,又加重了环境污染,给社会环境造成愈来愈难以承受的压力。而且简单遗弃建筑垃圾也不符合资源的可持续发展战略,是对自然资源的极大浪费。本文通过利用建筑废弃物作为骨料,以水泥和粉煤灰作为胶凝材料,制作成再生骨料砌块,再生骨料混凝土,再生骨料混凝土路面砖,再生骨料砂浆。并对其强度、吸水率、抗冻性、坍落度等相关性能进行了一系列的正交试验。结果显示,再生骨料混凝土的强度均高于15MPa,抗折强度高于5MPa,抗冻性高于50D,其中质量损失率小于5%,强度损失率小于25%。虽然较新骨料混凝土而言,相关性能均有一定的差距,但以复合实际施工的国家标准。并对建筑垃圾再生骨料的生产成本进行综合分析,结果表明,每立方米的再生骨料混凝土比新预拌混凝土节省44元人民币。因此,本课题对于建筑垃圾的回收处理及研究利用的研究具有经济、环保等非常重大的实际意义。
[Abstract]:According to the latest statistics, the construction area of our country has exceeded 650 million square meters every year, and the result is that the construction waste is increasing day by day. At present, the amount of construction waste in our country accounts for a large proportion of the total amount of urban garbage every year, which has become a difficult problem to deal with properly. At present, most of the construction waste is transported to the countryside or countryside without any treatment. This treatment method not only occupies a large amount of cultivated land and construction funds, but also causes problems such as dust and dust in the process of transportation and stacking, and exacerbates environmental pollution and causes more and more unbearable pressure on the social environment. And the simple abandonment of construction waste is not in line with the sustainable development strategy of resources, it is a great waste of natural resources. In this paper, recycled aggregate block, recycled aggregate concrete pavement brick and recycled aggregate mortar are made by using construction waste as aggregate and cement and fly ash as cementitious material. A series of orthogonal tests were carried out on its strength, water absorption, frost resistance, slump and other related properties. The results show that the strength of recycled aggregate concrete is higher than 15MPa, the flexural strength is higher than 5MPa, the frost resistance is higher than 50D, the mass loss rate is less than 5, and the strength loss rate is less than 25. Compared with the new aggregate concrete, there is a certain gap in the related properties, but the national standard of composite construction is adopted. The production cost of recycled aggregate of construction waste is analyzed synthetically. The result shows that the recycled aggregate concrete of every cubic meter saves 44 yuan than the fresh mix concrete. Therefore, the research on recovery, treatment and utilization of construction waste has great practical significance, such as economic, environmental protection and so on.
【学位授予单位】：吉林建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X799.1

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