【摘要】：隨著建筑業(yè)的迅猛發(fā)展、不可再生資源的日益減少，對建筑廢棄物再利用的研究已經(jīng)成為國內(nèi)外一項重要的課題。本研究主要是對廢棄混凝土經(jīng)破碎篩分后得到的混凝土再生微粉的研究。 混凝土再生微粉與普通水泥存在差異，通過對再生微粉的一些基本性質(zhì)進行分析，主要包括再生微粉的制備、再生微粉的物理性質(zhì)、化學性質(zhì)的分析，初步了解再生微粉；在了解其基本的物理化學性質(zhì)后，通過膠砂試驗研究再生微粉對膠砂試件的抗折強度和抗壓強度的影響，，并通過在試件中加入堿性激發(fā)劑Ca(OH)2和Na2SiO39H2O，以及物理研磨細化加工的方法處理再生微粉這三種活性激發(fā)方法，研究如何提高再生微粉活性激發(fā)，選出最佳的再生微粉的活性激發(fā)配比。 再生混凝土的抗壓強度和抗碳化性能是多方面因素共同作用的結(jié)果，本試驗還研究了再生微粉作為礦物摻合料，按照一定的比例等量取代水泥后，其立方體抗壓試件的抗壓強度以及混凝土棱柱體的碳化深度，并與相同配比的普通混凝土試件、粉煤灰混凝土試件的抗壓強度以及碳化深度相對比，分析再生微粉對混凝土立方體抗壓試件強度的影響，以及對混凝土棱柱體抗碳化性能的影響。研究中重點考慮了礦物摻合料的種類（再生微粉、粉煤灰）與取代率（0%、10%、20%、30%）、水膠比（0.54、0.61）和活性激發(fā)方法（化學激發(fā)和物理激發(fā)）這三個因素對混凝土抗壓強度性能以及抗碳化性能的影響，并分析不同活性激發(fā)處理后再生微粉混凝土、普通混凝土、粉煤灰混凝土的抗壓強度和抗碳化性能的差異。
[Abstract]:With the rapid development of the construction industry and the decrease of non-renewable resources, the research on the reuse of construction waste has become an important topic at home and abroad. This paper mainly studies the recycled fine powder of waste concrete after crushing and screening. There are some differences between concrete recycled micro-powder and ordinary cement. Some basic properties of recycled micro-powder are analyzed, including preparation of regenerated micro-powder, physical property and chemical property of regenerated micro-powder, and preliminary understanding of regenerated micro-powder. After understanding its basic physical and chemical properties, the influence of regenerated micro-powder on the flexural strength and compressive strength of cement sand specimen was studied by the test of cement sand. By adding alkaline activators Ca (OH) _ 2 and Na2SiO39H2O, into the specimen and treating the regenerated micro-powder by physical grinding and refining, this paper studies how to improve the activity excitation of the regenerated micro-powder. The best activation ratio of regenerated powder was selected. The compressive strength and carbonation resistance of recycled concrete are the result of many factors. The compressive strength of the cube compression specimen and the carbonation depth of the concrete prism are compared with the compressive strength and the carbonization depth of the ordinary concrete specimen and the fly ash concrete specimen with the same ratio. The influence of regenerated micro-powder on the strength of concrete cube compression specimen and on the carbonation resistance of concrete prism is analyzed. The research focuses on the types of mineral admixtures (regenerated micropowder, The effects of fly ash and substitution ratio (0%), water / binder ratio (0.540.61) and active excitation method (chemical excitation and physical excitation) on compressive strength and carbonation resistance of concrete were analyzed. Difference in compressive strength and carbonation resistance of ordinary concrete and fly ash concrete.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU528

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