装配式钢结构住宅配套煤矸石墙板的混凝土与砂浆配合比的试验研究

发布时间：2018-03-21 01:51

本文选题：煤矸石　切入点：混凝土　出处：《太原理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：中国作为一个能源大国,每年煤的开采量和消耗量都位居全球前列。随着煤炭资源的大规模开采,其伴生物——煤矸石也在不断积存。大量煤矸石的堆存不仅危害自然环境,而且不能对其有效利用也是对资源的浪费。另一方面,随着我国钢结构住宅的发展和推广的进一步深入,工程中对研发新型配套墙板材料的需求也日趋迫切。本文依托国家青年基金科学项目“与钢结构住宅配套的煤矸石新型墙板的理论与试验研究”(51208332),以山西省某市积存的煤矸石和自燃煤矸石为研究对象,进行的试验研究以及成果如下:(1)通过原材料物理力学试验、SEM扫描、能谱仪检测等,测得煤矸石和自燃煤矸石的密度、颗粒级配、吸水率、筒压强度等基本物理力学性能,化学成分以及放射性。(2)以煤矸石为粗集料设计了3种配合比,通过123个试块的力学性能试验,研究了C20、C25、C30煤矸石混凝土4个龄期的抗压强度、劈裂抗拉强度、弹性模量等力学性能,给出以煤矸石为粗集料的混凝土的推荐配合比。(3)以自燃煤矸石为粗集料,设计了5种配合比,通过205个试块的抗压强度、劈裂抗拉强度、弹性模量测试试验,分析了粉煤灰、减水剂、膨胀珍珠岩等对混凝土强度、表观密度、和易性的影响,给出以自燃煤矸石为粗集料的混凝土的推荐配合比。(4)将自燃煤矸石破碎,得到粒径小于3mm的连续级配的人工砂,以过氧化氢溶液作为引气剂配制泡沫砂浆,设计了13组砂浆配合比,制作了336个砂浆立方体试块,研究了过氧化氢溶液、减水剂、纤维素、膨胀珍珠岩对泡沫砂浆表观密度和强度的影响,给出了强度等级为M10的自燃煤矸石人工砂泡沫砂浆的推荐配合比。(5)以自燃煤矸石人工砂泡沫砂浆为材料,制作墙板试件,通过传热系数测试,得到泡沫砂浆的传热系数为2.705W/(m~2·K);通过隔声性能测试,测得100mm厚泡沫砂浆墙板构件的隔声量为37dB,试件表面进行10mm厚抹灰处理后隔声量为41dB。本文研究的煤矸石、自燃煤矸石混凝土不仅可用作钢结构住宅配套墙板的材料,也可用于一般混凝土结构构件中;砂浆能够作为新型墙材用于钢结构建筑配套内墙板中。这些新型材料的使用在一定程度上有助于钢结构住宅及装配式建筑的应用和推广,而且能实现煤矸石的资源化利用,减小其对环境的危害,实现社会、环境、经济三重效益。
[Abstract]:As a large energy country, China ranks among the top coal mining and consumption in the world every year. With the large-scale exploitation of coal resources, the associated biologics-coal gangue is also accumulating. A large amount of coal gangue is not only harmful to the natural environment. On the other hand, with the further development and promotion of steel housing in China, In the project, the demand for the new matching wall board material is becoming more and more urgent. This paper relies on the national youth fund science project "the theory and the test research of the coal gangue new type wall board matching with the steel structure residence", and uses it to a certain market in Shanxi province. Coal gangue and spontaneous combustion gangue are the objects of study. The experimental research and the results are as follows: (1) the basic physical and mechanical properties of coal gangue and spontaneous combustion gangue are measured by SEM scanning, energy spectrometer testing and so on. The basic physical and mechanical properties of coal gangue and spontaneous combustion gangue are obtained, such as particle gradation, water absorption rate and cylinder pressure strength. The chemical composition and radioactivity of coal gangue were used to design three kinds of compounding ratios. The compressive strength and splitting tensile strength of C20C25C30 gangue concrete at 4 ages were studied through the mechanical property tests of 123 test blocks. According to the mechanical properties such as modulus of elasticity, the recommended mix ratio of concrete with coal gangue as coarse aggregate is given. With spontaneous combustion gangue as coarse aggregate, five kinds of blending ratio are designed, and the splitting tensile strength is obtained through the compressive strength of 205 test blocks. The effects of fly ash, water reducer and expanded perlite on the strength, apparent density and easiness of concrete are analyzed. The recommended mix ratio of concrete with spontaneous combustion gangue as coarse aggregate is given. Continuous graded artificial sand with particle size less than 3 mm was obtained. The foam mortar was prepared with hydrogen peroxide solution as air entraining agent. Thirteen groups of mortar mixture ratio were designed, 336 mortar cube test blocks were made, hydrogen peroxide solution and water reducing agent were studied. The effect of cellulose and expanded perlite on the apparent density and strength of foam mortar is studied. The recommended mix ratio of spontaneous combustion coal gangue artificial sand foam mortar with strength grade M10 is given. The heat transfer coefficient of foamed mortar is 2.705W / / m ~ (2 路kg) by measuring the heat transfer coefficient of wall board, and the sound insulation performance is tested. The sound insulation of 100 mm thick foam mortar wall board is 37 dB, and the sound insulation is 41 dB after 10 mm thick plastering on the surface of the specimen. The coal gangue and spontaneous combustion gangue concrete studied in this paper can not only be used as the steel structure housing wall board materials. It can also be used in general concrete structural members; mortar can be used as a new type of wall material in steel structure buildings. The use of these new materials is helpful to the application and popularization of steel structure residential buildings and prefabricated buildings to some extent. And it can realize the utilization of coal gangue, reduce its harm to the environment and realize the triple benefit of society, environment and economy.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU528

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