基于响应面法的石灰-矿渣/生土复合材料热湿综合性能

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。

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

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 compo-site) 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.