尾矿砂配制农村公路混凝土性能研究

发布时间：2018-05-20 08:36

  本文选题：尾矿砂 + 农村公路　； 参考：《华北理工大学》2015年硕士论文

【摘要】：随着建筑行业的蒸蒸日上,混凝土的需求量也在日益增长,混凝土中的砂、石等原材料出现了严重的危机,而随着冶金工业的发展,尾矿砂的产生量不断增加,尾矿砂的存在严重破坏了周围的自然环境,对人类的生活造成了一定的危害。农村公路建设是当前我国公路交通事业的重点工作,它是连接城市和农村之间的纽带。由于农村公路车速低,车流量较少,所以对于农村公路,水泥混凝土路面具有群众参与程度高、可以就地取材和养护费用少等优点,符合农村公路建设需要发动群众、依靠群众的方针。本文采用尾矿砂替代天然砂配制出了C20~C40不同强度等级的农村公路混凝土,研究了尾矿砂混凝土的工作性能、力学性能、抗收缩性能和抗渗性能。试验结果表明,尾矿砂混凝土具有优异的工作性能和较高的抗压和抗弯拉强度,能够满足农村公路混凝土对于工作性能和力学性能的要求,同时还具有较好的抗收缩性能和抗渗性能。因此,尾矿砂可以替代天然砂用于农村公路混凝土中。在农村公路混凝土中,利用尾矿砂替代天然砂,不仅解决了混凝土用砂紧缺的问题、又能充分利用工业废料、节约资源与能源、保护环境,具有良好的经济效益和社会效益,对我国经济建设有着重要的意义。
[Abstract]:With the prosperity of the construction industry and the increasing demand for concrete, the raw materials such as sand and stone in concrete have appeared serious crisis. With the development of metallurgical industry, the production of tailings sand is increasing. The existence of tailings sand has seriously damaged the surrounding environment and caused certain harm to human life. Village highway construction is the key work of the current road traffic in China. It is the link between the city and the countryside. Because of the low speed of the rural highway and the less traffic, the cement concrete pavement has the advantages of the high participation of the masses, the less cost of the ground material and the maintenance cost, which is in line with the construction of the rural highway. In order to mobilize the masses and rely on the policy of the masses, this paper uses the tailings sand instead of natural sand to make up the rural highway concrete with different strength grades of C20~C40, and studies the working performance, mechanical properties, anti shrinkage and seepage resistance of the tailings sand concrete. The experimental results show that the tailings sand concrete has excellent working performance and higher performance. Compressive and flexural tensile strength can meet the requirements of rural highway concrete for work performance and mechanical properties, but also have better anti shrinkage and seepage resistance. Therefore, tailings sand can be used instead of natural sand in rural highway concrete. In rural highway concrete, the use of tailings instead of natural sand is not only solved. The shortage of sand in concrete can also make full use of industrial waste, save resources and energy, protect the environment, have good economic and social benefits. It is of great significance to the economic construction of our country.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414
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本文编号：1913914