煤矸石表面处理后做混凝土骨料的研究

发布时间：2018-03-30 22:14

本文选题：表面处理　切入点：煤矸石混凝土　出处：《安徽理工大学》2015年硕士论文

【摘要】：煤矸石是在产煤行业中不可避免的、伴随产生的一种工业废料,并且在我国煤矸石的产量在逐年增长。煤矸石对无论是对社会环境还是对生态环境都带来了严重的负面影响,如果不加以控制,那么将会带来不可估量的损失。此课题本着以变废为宝的愿望,如果煤矸石可以代替石子做混凝土骨料,不仅可以解决目前石子材料价格高且紧缺的问题,还且还可以处理大量的工业废料,不仅保护了环境,而且还带来了经济效益。文章主要采用以下几个思路对煤矸石集料混凝土进行了研究： 1.查阅了大量关于淮南矿区煤矸石特性的资料文献,对煤矸石的化学组成有了大体地认识。 2.对淮南矿区不同地点的煤矸石的部分性质进行了测试,并用混凝土强度理论对其做了评价。 3.将煤矸石表面进行包裹作为混凝土的粗骨料,制作不同等级的煤矸石混凝土并测试其抗压强度。 4.测试煤矸石混凝土的膨胀性及其对钢筋的锈蚀作用。文章的研究作为煤矸石的再生利用可能途径之一,作者通过以上思路的研究初步得出以下结论： 1.将煤矸石表面用水泥浆包裹的煤矸石集料混凝土的强度明显高于表面未做任何处理的煤矸石集料混凝土。 2.通过对煤矸石集料混凝土的强度理论分析,发现其破坏机理是“弱”包“强”转变为“强”包“弱”,通过试验发现煤矸石集料混凝土的适配强度是在C30以下。 3.煤矸石混凝土的强度不会因为随着龄期的增长而发生降低,其长期强度与普通混凝土基本一致。 4.通过测量混凝土膨胀性实验,煤矸石集料膨胀性小于规定的标准值,为非活性集料。 5.通过半电池电位法测量表面处理后的煤矸石混凝土钢筋锈蚀情况,初步符合要求。
[Abstract]:Coal gangue is inevitable in the coal production industry, accompanied by a kind of industrial waste, and the output of coal gangue is increasing year by year in our country. The coal gangue has brought serious negative influence to both social environment and ecological environment. If it is not controlled, it will bring incalculable losses. This subject is based on the desire to turn waste into treasure. If coal gangue can be used as concrete aggregate instead of stone, it can not only solve the problem of high price and shortage of stone materials at present, And also can deal with a large number of industrial waste, not only protect the environment, but also bring economic benefits. In this paper, the coal gangue aggregate concrete is studied in the following ways:. 1. A large number of documents about the characteristics of coal gangue in Huainan mining area are consulted, and the chemical composition of coal gangue is generally understood. 2. Some properties of coal gangue in Huainan mining area are tested and evaluated with concrete strength theory. 3. The coal gangue surface is wrapped as the coarse aggregate of concrete, and different grade coal gangue concrete is made and its compressive strength is tested. 4. Test the expansibility of coal gangue concrete and its corrosion effect on steel bar. As one of the possible ways of regeneration and utilization of coal gangue, the author draws the following conclusions through the study of the above ideas:. 1. The strength of coal gangue aggregate concrete coated with cement slurry is obviously higher than that of coal gangue aggregate concrete without any treatment on the surface. 2. Based on the theoretical analysis of the strength of coal gangue aggregate concrete, it is found that the failure mechanism of coal gangue aggregate concrete is from "weak" to "strong" to "strong" and "weak", and it is found that the suitable strength of coal gangue aggregate concrete is below C30. 3. The strength of coal gangue concrete does not decrease with the increase of age, and its long-term strength is basically the same as that of ordinary concrete. 4. The expansion of coal gangue aggregate is less than the specified standard value by measuring the expansive property of concrete. 5. The corrosion of steel bar of coal gangue concrete after surface treatment is measured by semi-battery potentiometry, and it is in accordance with the requirements.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD849.5;TU528.041

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