| 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. |
| 关键词: 泡沫混凝土 导热系数 低密度 气孔率 |
| DOI：103969/j.issn1007 9629202002013 |
| 分类号: |
| 基金项目:上海市科学技术委员会科研计划项目（17DZ1200303） |
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| Investigations on Thermal Conductivity Models of Low Density Foamed Concrete |
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YANG Zhenghong1, LI Tingting2, YU Long1
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1.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China;2.School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
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| Abstract: |
| 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. |
| Key words: foamed concrete thermal conductivity low density air void fraction |
