本文選題：煤矸石混凝土 + 正交試驗�。� 參考：《安徽理工大學》2014年碩士論文

【摘要】：煤矸石是煤炭行業(yè)產(chǎn)生的工業(yè)廢物之一,對生態(tài)環(huán)境和社會環(huán)境都構(gòu)成了嚴重的威脅。目前我國現(xiàn)有煤矸石儲量巨大,煤矸石的儲量的年增長率逐年上升。如不采取高效的、節(jié)能環(huán)保的措施對煤矸石進行快速的吸納,將對社會效益、經(jīng)濟效益和環(huán)境效益帶來不可彌補的損失。利用煤矸石作為混凝土集料來生產(chǎn)普通混凝土,一方面可以大量吸納煤矸石,另一方面可以顯著地減少建筑工程中對天然集料的使用量,具有較好的經(jīng)濟效益和社會效益。 目前我國正處于快速發(fā)展的關(guān)鍵階段,大興土木,各類基礎(chǔ)設(shè)施亟需完善,在高速建設(shè)的同時,能源危機、環(huán)境污染、生態(tài)破壞等問題相繼涌現(xiàn)。借此契機,作者對用煤矸石代替天然石子作為普通混凝土的粗骨料的可行性進行了研究,作者查閱了大量文獻發(fā)現(xiàn),對煤矸石集料混凝土的研究不多,基于種種原因,對煤矸石集料混凝土的研究顯得非常緊迫。 文章主要采用以下幾個思路對煤矸石集料混凝土進行了研究： (1)查閱了大量關(guān)于淮南礦區(qū)煤矸石特性的資料文獻,對煤矸石的周期特性有了大體地認識。 (2)對淮南礦區(qū)的煤矸石的部分性質(zhì)進行了試驗研究,并運用規(guī)范及煤矸石混凝土的強度理論對煤矸石進行了評價。 (3)運用正交試驗的方法確定了C30混凝土的最佳配合比。 (4)通過抗凍性試驗對煤矸石混凝土的耐久性進行了簡單的研究。文章的研究作為煤矸石的再生利用可能途徑之一,作者通過以上思路的研究初步得出以下結(jié)論： (1)通過對煤矸石集料混凝土的強度理論分析發(fā)現(xiàn)其破壞機理是“弱”包“強”轉(zhuǎn)變?yōu)椤皬姟卑叭酢?通過試驗發(fā)現(xiàn)煤矸石集料混凝土的適配強度是C30以下。 (2)根據(jù)集料-基體協(xié)調(diào)性理論,基體漿體的強度為中強基體,最大粒徑為20mm顆粒級配的煤矸石混凝土的試驗結(jié)果要比最大粒徑為31.5mm、l0mm的顆粒級配煤矸石混凝土的試驗結(jié)果好。 (3)利用正交試驗得出最優(yōu)配合比因素水平為：水膠比w/c=0.5,煤矸石摻量為60%,煤矸石最大粒徑為20mm。 (4)利用最優(yōu)配合比為基準組進行耐久性試驗,試驗對比分析結(jié)果為煤矸石摻量60%最優(yōu)配合比下的煤矸石集料混凝土的抗凍性能最好。
[Abstract]:Coal gangue is one of the industrial wastes produced by the coal industry, which poses a serious threat to the ecological environment and social environment. At present, the existing coal gangue reserves in China are huge, the annual growth rate of coal gangue reserves is increasing year by year. If the coal gangue is not absorbed quickly by the measures of high efficiency, energy saving and environmental protection, it will bring irreparable losses to the social, economic and environmental benefits. The use of coal gangue as concrete aggregate to produce ordinary concrete can absorb large amount of coal gangue on the one hand, on the other hand, it can significantly reduce the use of natural aggregate in construction engineering, which has good economic and social benefits. At present, our country is in the critical stage of rapid development, great construction, all kinds of infrastructure need to be improved, energy crisis, environmental pollution, ecological damage and other problems have emerged. Taking this opportunity, the author studies the feasibility of using coal gangue instead of natural stone as coarse aggregate of ordinary concrete. After consulting a large number of documents, the author finds that there are few researches on coal gangue aggregate concrete for various reasons. The study of coal gangue aggregate concrete is very urgent. This paper mainly uses the following ideas to study the coal gangue aggregate concrete: (1) consulting a large number of documents about the characteristics of coal gangue in Huainan mining area, The periodic characteristics of coal gangue are generally understood. (2) some properties of coal gangue in Huainan mining area are studied experimentally. The standard and the strength theory of coal gangue concrete are used to evaluate the coal gangue. (3) the optimum mix ratio of C30 concrete is determined by orthogonal test. (4) the coal gangue is evaluated by freezing resistance test. The durability of stone concrete is studied simply. The research of this paper is one of the possible ways to regenerate coal gangue. The author draws the following conclusions: (1) through the theoretical analysis of the strength of coal gangue aggregate concrete, it is found that the failure mechanism of the concrete is "weak" and "strong" to "strong" and "weak". It is found that the suitable strength of coal gangue aggregate concrete is less than C30. (2) according to the theory of aggregate and matrix coordination, the strength of matrix slurry is medium strong matrix. The test results of coal gangue concrete with maximum particle size of 20mm particle gradation are better than those of coal gangue concrete with maximum particle size of 31.5 mm / 10 mm. (3) the optimum proportion factor level is obtained by orthogonal test. The results are as follows: water / binder ratio w / c0. 5, coal gangue content 60 and maximum coal gangue diameter 20mm. (4) durability test is carried out by using the optimal mix ratio as the benchmark group, the content of coal gangue is 60 and the maximum particle size of coal gangue is 20mm. The test results show that the coal gangue aggregate concrete with 60% coal gangue content has the best frost resistance.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU528

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