人工气候环境下再生混凝土微环境温湿度响应试验研究

发布时间：2018-06-08 08:16

本文选题：再生混凝土 + 压汞法　；参考：《中国矿业大学》2017年硕士论文

【摘要】：基于可持续发展战略对环境保护和资源节约的要求,再生混凝土的研究和利用具有重要的科研意义和实用价值。人工气候环境下再生混凝土的微环境响应规律是研究气候环境作用和侵蚀环境作用的基础,是混凝土耐久性研究的重要组成部分。本文通过进行再生混凝土的孔隙结构试验研究和人工气候环境下再生混凝土微环境温湿度响应试验研究,分析再生混凝土微环境温湿度响应规律。采用压汞法研究再生混凝土的孔隙结构,分析再生粗骨料取代率对再生混凝土孔隙率、孔径分布等孔隙结构参数的影响。恒定温湿度的人工气候环境下,使用智能温湿度传感器和记录仪测量不同再生粗骨料取代率、水灰比、环境相对湿度条件下再生混凝土的微环境温度值,总结出再生混凝土微环境温度响应规律。基于传热学基本理论和再生混凝土孔隙结构参数分析再生粗骨料取代率、水灰比、环境相对湿度对再生混凝土微环境温度响应规律的影响。恒定温湿度的人工气候环境下,使用智能温湿度传感器和记录仪测量不同再生粗骨料取代率、水灰比、环境温度条件下再生混凝土的微环境相对湿度值,总结出再生混凝土微环境相对湿度反向响应规律并与正向响应进行比较,然后通过试验数据计算出再生混凝土反向湿质扩散系数。基于传质学基本理论和再生混凝土孔隙结构参数,分析再生粗骨料取代率、水灰比、环境温度对再生混凝土微环境相对湿度反向响应规律和反向湿质扩散系数的影响。
[Abstract]:Based on the requirements of sustainable development strategy for environmental protection and resource conservation, the research and utilization of recycled concrete has important scientific research significance and practical value. The law of microenvironmental response of recycled concrete in artificial climate is the basis of the study of climate environment and erosion environment, and it is an important part of concrete durability research. Based on the experimental study of pore structure of recycled concrete and the experimental study of temperature and humidity response of recycled concrete in artificial climate, the law of temperature and humidity response of recycled concrete in micro environment is analyzed in this paper. The pore structure of recycled concrete was studied by mercury injection method, and the influence of recycled coarse aggregate replacement ratio on pore structure parameters such as porosity and pore size distribution of recycled concrete was analyzed. Under the condition of constant temperature and humidity, intelligent temperature and humidity sensor and recorder were used to measure the microambient temperature of recycled concrete under different regenerated coarse aggregate substitution rate, water-cement ratio and relative humidity. The temperature response of recycled concrete in microenvironment is summarized. Based on the basic theory of heat transfer and the pore structure parameters of recycled concrete, the effects of the replacement ratio of recycled coarse aggregate, water-cement ratio and relative humidity on the temperature response of recycled concrete microenvironment were analyzed. Under the condition of constant temperature and humidity, intelligent temperature and humidity sensor and recorder were used to measure the microenvironmental relative humidity of recycled concrete under different regenerated coarse aggregate substitution rate, water-cement ratio and ambient temperature. The reverse response law of relative humidity of recycled concrete is summarized and compared with the positive response. Then the reverse wet mass diffusion coefficient of recycled concrete is calculated by experimental data. Based on the basic theory of mass transfer and pore structure parameters of recycled concrete, the effects of recycled coarse aggregate substitution ratio, water-cement ratio and ambient temperature on the reverse response law of relative humidity and reverse wet diffusion coefficient of recycled concrete were analyzed.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU528

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