基于响应面法的石灰-矿渣/生土复合材料热湿综合性能

Heat & moisture comprehensive property for lime-slag/soil composites based on response surface methodology

采用石灰和矿渣作为改性材料制备石灰-矿渣/生土复合材料,利用响应面法研究石灰掺量、矿渣掺量和含水率对石灰-矿渣/生土复合材料热湿综合性能的影响,对石灰-矿渣/生土复合材料的制备工艺进行优化。结果表明,石灰掺量、矿渣掺量和含水率均对热湿综合性能产生影响;通过回归分析得到石灰-矿渣/生土复合材料的制备优化方案是石灰掺量(石灰与复合材料的质量比)为10.19%、矿渣掺量(矿渣与复合材料的质量比)为4.02%、含水率(水量与复合材料的质量比)为9.00%,且优化石灰-矿渣/生土复合材料平均平衡含湿量为12.725%,导热系数为0.798 W/(m·K),具有良好的热湿综合性能;通过结构分析可知,在碱性激发和微集料作用下,优化石灰-矿渣/生土复合材料内部呈现出完整、密实的结构体系特点,兼顾材料的力学、耐久性和热湿性能。

Lime and slag could be used to prepare lime-slag/soil composites. The effect of lime content, slag content and moisture content on heat ＆ moisture comprehensive property of lime-slag/soil composites was studied by response surface methodology and the preparation technology for lime-slag/soil composites was optimized. The results show that heat ＆ moisture comprehensive property is influenced by lime content, slag content and moisture content. Optimal program is obtained by regression analysis that lime content （mass ratio between lime and composite） is 10. 19%, slag content （mass ratio between slag and composite） is 4. 02%, and moisture content （mass ratio between water and composite） is 9.00 %. Average equilibrium moisture content of optimal lime-slag/soil composites is 12. 725%, thermal conductivity is 0. 798 W/（m·K）, optimal lime-slag/soil composites have favorable heat ＆ moisture comprehensive property. Under the effect of alkaline excitation and micro aggregate, optimal lime-slag/soil composites have the whole and compact construction through structural analysis, and reasonable mechanical performance and heat ＆ moisture comprehensive property.