聚合物改性劑改良透水混凝土性能試驗(yàn)研究
本文選題:聚合物改性劑 + 透水混凝土; 參考:《西南科技大學(xué)》2017年碩士論文
【摘要】:透水混凝土具有“透水、透氣、降噪、吸熱”的特點(diǎn),在我國城市中的應(yīng)用已經(jīng)取得了良好的社會(huì)效益、環(huán)境效益和生態(tài)效益,但受其強(qiáng)度低或透水性不佳的影響,使用范圍受到限制。如何提高透水混凝土強(qiáng)度或透水性成為研究透水混凝土的核心內(nèi)容。本論文采取室內(nèi)試驗(yàn),選擇了多種對(duì)透水混凝土性能有改善作用的聚合物改性劑,分別進(jìn)行了聚合物改性劑溶液濃度對(duì)其溶液粘度影響試驗(yàn)、各聚合物改性透水混凝土物理力學(xué)性能對(duì)比試驗(yàn)以及混合溶液(羥丙基甲基纖維素溶液和可再分散乳膠粉溶液按不同粘度配置)改性透水混凝土物理力學(xué)性能影響規(guī)律試驗(yàn)。主要研究成果如下:(1)將5種聚合物改性劑(聚乙烯醇、可再分散乳膠粉、羥丙基甲基纖維素、環(huán)氧樹脂和乙酸乙烯酯-乙烯共聚乳液)不同溶液濃度分別對(duì)其溶液粘度的影響進(jìn)行試驗(yàn),確定了溶液濃度與其溶液粘度的非線性變化規(guī)律;(2)以相同粘度為研究基礎(chǔ),分別制備了聚合物改性透水混凝土試件,經(jīng)過性能測試后,得到:可再分散乳膠粉能夠顯著提高透水混凝土的抗壓強(qiáng)度,但其透水性有一定程度地降低;羥丙基甲基纖維素可以顯著地提高透水混凝土的透水性,但對(duì)抗壓強(qiáng)度的提高作用不明顯;(3)將可再分散乳膠粉與羥丙基甲基纖維素兩種聚合物改性劑按不同比例混合制作透水混凝土試件,找到了提高透水混凝土強(qiáng)度和透水性最佳的配合比。
[Abstract]:Permeable concrete has the characteristics of "water permeability, air permeability, noise reduction and heat absorption". Its application in cities in China has obtained good social, environmental and ecological benefits, but it is affected by its low strength or poor water permeability. The scope of use is limited. How to improve the strength or water permeability of permeable concrete becomes the core content of the research on permeable concrete. In this paper, a variety of polymer modifiers which can improve the performance of permeable concrete were selected, and the effects of the concentration of polymer modifier solution on the viscosity of the solution were tested. The physical and mechanical properties of polymer modified permeable concrete were compared and the effects of mixed solution (hydroxypropyl methyl cellulose solution and redispersible emulsion powder solution on physical and mechanical properties of modified permeable concrete according to different viscosity) were tested. The main results of this study are as follows: (1) Polyvinyl alcohol, redispersible emulsion powder, hydroxypropyl methyl cellulose, The effects of different solution concentrations on the viscosity of epoxy resin and ethylene-vinyl acetate copolymerization emulsion were tested, and the nonlinear variation law of solution concentration and solution viscosity was determined. The polymer modified permeable concrete specimens were prepared, and the results showed that the dispersible latex powder could significantly improve the compressive strength of the permeable concrete, but its permeability was reduced to a certain extent; Hydroxypropyl methyl cellulose can significantly improve the permeability of permeable concrete. However, the effect on compressive strength is not obvious. (3) the dispersible latex powder and hydroxypropyl methyl cellulose are mixed to make permeable concrete specimen in different proportion. The optimum mix ratio of improving the strength and permeability of permeable concrete is found.
【學(xué)位授予單位】:西南科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TU528
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