泡沫混凝土的优化设计及其热物理性能的数值模拟研究

发布时间：2018-06-05 06:25

本文选题：泡沫混凝土 + 硬脂酸钙　；参考：《浙江工业大学》2017年硕士论文

【摘要】：本文以泡沫混凝土的基本配制原理为基础,结合近几年来人们对高性能泡沫混凝土研究所提出的要求,选择化学泡沫混凝土中应用最为广泛的材料,对泡沫混凝土开展一系列试验研究工作。通过调节稳泡剂含量和掺入轻骨料的方式,试验分别配制出了导热系数达0.063W/m·K和0.067 W/m·K的泡沫混凝土。本文对泡沫混凝土制备中泡沫的稳定性及轻骨料憎水性进行提升,并对其相关的性能做了系统的研究。泡沫稳定性的研究内容主要包括:硬脂酸钙的稳泡时间和稳泡效果;泡沫稳定性对泡沫混凝土孔结构的影响;泡沫稳定性对泡沫混凝土吸水率、抗压强度、导热系数的间接影响。轻骨料的研究内容主要包括:膨胀珍珠岩改性过程中憎水剂的最佳浓度及最佳掺量确定;膨胀珍珠岩对不同密度泡沫混凝土的效果差异;改性后膨胀珍珠岩泡沫混凝土的吸水率;膨胀珍珠岩的掺入对泡沫混凝土力学及热工性能影响。本文在结合以上两方面研究的基础上选择性能优良的泡沫混凝土参数,对泡沫混凝土外墙外保温系统进行数值模拟。为确保模拟的真实性,其环境参数均来自于2015年杭州实际测量的热环境参数。通过与普通泡沫混凝土外墙外保温模拟结果比较,改良性能后的泡沫混凝土外墙外保温系统具备更佳的优势。再结合泡沫混凝土无机不燃的特点,改性泡沫混凝土外墙外保温与聚苯板外墙外保温的保温隔热效果接近。
[Abstract]:Based on the basic preparation principle of foam concrete and the requirements of the research on high performance foam concrete in recent years, this paper selects the most widely used materials in chemical foam concrete. A series of experiments on foam concrete are carried out. Foam concrete with thermal conductivity of 0.063W/m K and 0.067 W / m K was prepared by adjusting the content of foam stabilizer and adding light aggregate. In this paper, the stability of foam and the hydrophobicity of lightweight aggregate in the preparation of foamed concrete are improved, and its related properties are systematically studied. The research contents of foam stability mainly include: foam stabilization time and effect of calcium stearate; influence of foam stability on pore structure of foam concrete; foam stability on water absorption rate and compressive strength of foam concrete; The indirect effect of thermal conductivity. The research contents of lightweight aggregate mainly include: determination of the optimum concentration and content of hydrophobic agent in the process of modification of expanded perlite, difference of effect of expanded perlite on foam concrete of different density; The water absorption rate of the modified expanded perlite foam concrete and the influence of expanded perlite incorporation on the mechanical and thermal properties of the expanded perlite concrete. In this paper, based on the above two aspects of the research, the parameters of foam concrete with excellent performance are selected, and the external insulation system of external wall of foam concrete is numerically simulated. In order to ensure the authenticity of the simulation, the environmental parameters are obtained from the thermal environmental parameters measured in Hangzhou in 2015. Compared with the external insulation simulation results of common foamed concrete exterior wall, the improved external insulation system of foam concrete exterior wall has better advantages. Combined with the characteristics of inorganic noncombustibility of foam concrete, the thermal insulation effect of exterior wall of modified foam concrete is similar to that of external wall of polystyrene board.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU528.2

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