【摘要】：隨著建設(shè)活動大規(guī)模加劇，建筑資源日趨減少與建筑垃圾引發(fā)的環(huán)境惡化問題日益嚴(yán)峻，如何將建筑垃圾的更好地回收利用成為了專家與學(xué)者共同關(guān)注的問題。將磚、砼再生細(xì)骨料應(yīng)用于砂漿的制備，提高了建筑垃圾的利用率，能夠產(chǎn)生良好的經(jīng)濟效益、社會效益和環(huán)保效益。 本文首先通過對磚、砼再生細(xì)骨料特征性能分析及研究，對再生細(xì)骨料進行級配調(diào)整及預(yù)吸水處理，提高其品質(zhì)，取代天然砂配置再生骨料砂漿。通過設(shè)置不同再生細(xì)骨料取代率配置強度分別為M5，M10，M15砂漿，測試其不同配合比下各種再生骨料砂漿試件的立方體抗壓強度，從而得出細(xì)骨料取代率對再生骨料砂漿性能的影響規(guī)律，不同灰砂比對再生骨料砂漿的影響規(guī)律，以及不同強度等級再生骨料砂漿最佳基礎(chǔ)配比。通過對粉煤灰的組成成分及對砂漿作用機理的分析，對其進行不同摻量配比配制等級強度為M5、M10、M15的再生骨料砂漿進行立方體抗壓強度試驗研究，對再生骨料砂漿的和易性及力學(xué)性能進行評估，從而得出粉煤灰對再生骨料砂漿性能的影響規(guī)律，以及得到粉煤灰在再生骨料砂漿中對水泥的最佳取代率。最后，通過配置不同強度等級及不同配合比的再生骨料砂漿，分別和普通蒸壓粉煤灰磚砌筑砌體雙剪試驗試件，測試試件抗剪強度從而評價再生骨料砂漿的粘結(jié)性能。 本文通過理論分析及試驗研究對廢磚和廢棄砼再生細(xì)骨料砂漿的應(yīng)用性能進行深入研究和探討，希望這些結(jié)論能對廢磚的再生利用及再生骨料砂漿的應(yīng)用推廣提供一定的參考依據(jù)。
[Abstract]:With the large-scale aggravation of construction activities, the problem of environmental deterioration caused by construction waste is becoming more and more serious. How to recycle construction waste has become a common concern of experts and scholars. The application of brick and concrete recycled fine aggregate to the preparation of mortar improves the utilization ratio of construction waste and can produce good economic benefit, social benefit and environmental protection benefit. In this paper, the characteristics of brick and concrete recycled fine aggregate are analyzed and studied firstly, then the recycled fine aggregate is adjusted and preabsorbed to improve its quality and replace the natural sand with recycled aggregate mortar. The cube compressive strength of various recycled aggregate mortar specimens was tested by setting different reclaimed fine aggregate replacement ratio configuration strength as M5 M10M15 mortar. Thus, the influence of fine aggregate replacement ratio on the properties of recycled aggregate mortar, the influence of different ratio of lime to sand on the performance of recycled aggregate mortar, and the optimum basic ratio of recycled aggregate mortar of different strength grades are obtained. By analyzing the composition of fly ash and the action mechanism of mortar, the cubic compressive strength of recycled aggregate mortar with different mixing ratio was studied. Based on the evaluation of the properties of recycled aggregate mortar, the influence of fly ash on the properties of recycled aggregate mortar and the optimum replacement ratio of fly ash to cement in recycled aggregate mortar were obtained. Finally, the shear strength of recycled aggregate mortar with different strength grade and mix ratio is tested by double shear test specimens of ordinary autoclaved pulverized coal brick masonry, and the bond performance of recycled aggregate mortar is evaluated. Through theoretical analysis and experimental study, the application properties of recycled fine aggregate mortar of waste brick and waste concrete are deeply studied and discussed in this paper. It is hoped that these conclusions can provide a certain reference for the recycling of waste bricks and the application and popularization of recycled aggregate mortar.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU578.1

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