聚合物改性剂改良透水混凝土性能试验研究

发布时间：2018-04-20 07:42

本文选题：聚合物改性剂 + 透水混凝土　；参考：《西南科技大学》2017年硕士论文

【摘要】：透水混凝土具有“透水、透气、降噪、吸热”的特点,在我国城市中的应用已经取得了良好的社会效益、环境效益和生态效益,但受其强度低或透水性不佳的影响,使用范围受到限制。如何提高透水混凝土强度或透水性成为研究透水混凝土的核心内容。本论文采取室内试验,选择了多种对透水混凝土性能有改善作用的聚合物改性剂,分别进行了聚合物改性剂溶液浓度对其溶液粘度影响试验、各聚合物改性透水混凝土物理力学性能对比试验以及混合溶液(羟丙基甲基纤维素溶液和可再分散乳胶粉溶液按不同粘度配置)改性透水混凝土物理力学性能影响规律试验。主要研究成果如下:(1)将5种聚合物改性剂(聚乙烯醇、可再分散乳胶粉、羟丙基甲基纤维素、环氧树脂和乙酸乙烯酯-乙烯共聚乳液)不同溶液浓度分别对其溶液粘度的影响进行试验,确定了溶液浓度与其溶液粘度的非线性变化规律;(2)以相同粘度为研究基础,分别制备了聚合物改性透水混凝土试件,经过性能测试后,得到:可再分散乳胶粉能够显著提高透水混凝土的抗压强度,但其透水性有一定程度地降低;羟丙基甲基纤维素可以显著地提高透水混凝土的透水性,但对抗压强度的提高作用不明显;(3)将可再分散乳胶粉与羟丙基甲基纤维素两种聚合物改性剂按不同比例混合制作透水混凝土试件,找到了提高透水混凝土强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.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU528

【参考文献】