摘要
采用水泥、石灰、粉煤灰作为改性剂,基于正交试验设计进行改性生土墙体材料的制备。选取导热系数和等温平衡含湿量作为热性能和湿性能考察指标,通过多指标矩阵分析法,计算影响试验热湿性能结果的各因素各水平的权重,从而确定改性生土墙体材料配合比的最优方案。结果表明,改性生土墙体材料的最佳配合比为水泥掺量7%,石灰掺量8%,粉煤灰掺量5%,含水率16%;改性生土墙体材料较水泥、混凝土等现代建筑材料具有良好的蓄热性能;通过组成结构分析和微观形貌分析可知,石灰的碳化反应、水泥和粉煤灰的水化反应产生的凝胶物质具有胶结作用,使得改性生土墙体材料结构内部形成较多的小孔径孔隙,并呈现出稳定的整体性结构,该结构增强了改性生土墙体材料的吸放湿性能。
Cement,lime and fly ash were used as modifier,the modified soil wall material was prepared based on orthogonal experimental design.The thermal conductivity and isothermal equilibrium moisture content were selected as the indexes for the investigation of heat and moisture properties,and the weights of various factors affecting the results of heat and moisture properties were calculated by matrix analysis method.So the mix proportion of modified soil wall material was determined.The results show that the optimum mix proportion of modified soil wall material is,cement content 7%,lime content 8%,fly ash content 5%,moisture content 16%.The modified soil wall material has better thermal storage performance than cement,concrete and other modern building materials.According to the analysis of composition and microstructure,the gel products produced by the carbonization reaction of lime and the hydration reaction of cement and fly ash have cementing effect,which form the small pores in the structure of the modified soil wall material and present a stable integral structure.Thus enhancing the moisture absorption-desorption performance of modified soil wall material.
作者
夏文静
蒋斌
吴涛
梁家华
XIA Wenjing;JIANG Bin;WU Tao;LIANG Jiahua(School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China)
出处
《硅酸盐通报》
CAS
北大核心
2020年第6期1859-1867,共9页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金面上项目(41877524)。
关键词
正交试验设计
生土
热湿性能
组成结构分析
微观形貌分析
orthogonal experimental design
soil
heat and moisture property
composition analysis
microstructure analysis
