掺泡量对泡沫混凝土热工性能的影响  

Effect of Foam Content on Thermal Performance of Foamed Concrete

作　　者：孟雅[1] 田川[2] 籍晓凯 

机构地区：[1]河北工业大学,天津300401 [2]北京建筑大学,北京100044

出　　处：《建筑节能》2015年第2期65-67,78,共4页BUILDING ENERGY EFFICIENCY

摘　　要：采用导热系数测定仪对泡沫混凝土掺泡量与其热工性能的关系进行了试验研究,利用分形理论对泡沫混凝土的微观结构进行了深入分析,并对其微观结构图形进行了分形维数的计算,最后建立数学回归方程,将分形维数与泡沫混凝土的热工性联系起来,定量描述了泡沫混凝土微观结构与宏观性能的关系。研究结果表明,发泡剂掺量在3.6-7.2 g之间时,随着发泡剂用量的增加,泡沫混凝土内部孔隙变得多而大,分布均匀,分形维数增大,导热系数减小,保温性能提高。The relationship between foam content of foamed concrete and thermal performance is researched by thermal conductivity measuring apparatus. The microstructure of foamed concrete is analyzed by fractal theory, and fractal dimensions of microstructure figures of foamed concrete are calculated. The thermal conductivity is connected with fractal dimension by establishing regression equation, which quantificationally describes the relationship between microstructure and macroscopic performance. The results show that when volume of foaming agent lies between 3.6 g and 7.2 g, the pore space becomes larger and well distributed with the increasing of foaming agent, and the amount of pore increases. The fractal dimension becomes larger, and thermal conductivity becomes smaller, then the thermal insulation property is enhanced.

关 键 词：泡沫混凝土 导热系数 分形理论 

分 类 号：TU528.2[建筑科学—建筑技术科学]