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低密度泡沫混凝土导热系数模型研究
Investigations on Thermal Conductivity Models of Low Density Foamed Concrete
投稿时间:2018-10-30  修订日期:2019-02-24
DOI:103969/j.issn1007 9629202002013
中文关键词:  泡沫混凝土  导热系数  低密度  气孔率
英文关键词:foamed concrete  thermal conductivity  low density  air void fraction
基金项目:上海市科学技术委员会科研计划项目(17DZ1200303)
        
作者单位
杨正宏
YANG Zhenghong
同济大学先进土木工程材料教育部重点实验室,上海201804
Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China
李婷婷
LI Tingting
同济大学材料科学与工程学院,上海201804
School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
于龙
YU Long
同济大学先进土木工程材料教育部重点实验室,上海201804
Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China
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中文摘要:
      针对干密度小于300kg/m3的低密度泡沫混凝土进行干密度和导热系数测试,同时采用X射线计算机断层扫描成像(XCT)技术对其气孔结构进行表征,并在此基础上利用二相体系材料导热系数模型对测试结果进行对比研究,提出了适用于低密度泡沫混凝土的新模型并进行验证.结果表明,该模型预测值与实测值具有显著相关性.
英文摘要:
      The dry density and thermal conductivity of foamed concrete, of which dry density is less than 300kg/m3 were tested. The air void structures of the foamed concretes were investigated by X CT. The tested results were analyzed by using theoretical models for thermal conductivity of two phase materials. The new equation was proposed and verified and it was applied to foamed concrete of which dry density is less than 300kg/m3. The results indicate that the predicted values agreed well with experimental ones.
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