| 温度和含湿量对建筑材料导热系数的影响 |
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| 引用本文： | 孙立新,冯驰,崔雨萌. 温度和含湿量对建筑材料导热系数的影响[J]. 重庆建筑大学学报, 2017, 39(6): 123-128 |
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| 作者姓名： | 孙立新 冯驰 崔雨萌 |
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| 作者单位： | 西安建筑科技大学 建筑学院, 西安 710055;中国建筑科学研究院 建筑环境与节能研究院, 北京 100013,中国建筑科学研究院 建筑环境与节能研究院, 北京 100013;华南理工大学 亚热带建筑科学国家重点实验室, 广州 510641,华南理工大学 亚热带建筑科学国家重点实验室, 广州 510641 |
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| 基金项目： | 国家自然科学基金（51508542）；华南理工大学亚热带建筑科学国家重点实验室开放课题（2016ZB19） |
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| 摘 要： | 导热系数是建筑材料最重要的热湿物性参数之一，温度和含湿量均能够对其产生影响。当温度和含湿量中的一个因素被确定后，一元线性函数通常被用来描述另一个因素对导热系数的影响。然而，实际情况下二者对导热系数的影响是同时存在的。采用防护热板法对聚苯乙烯泡沫（EPS）、岩棉、混凝土、胶粘剂和抹面胶等5种典型建筑材料在不同温度和含湿量下的导热系数进行测试。结果表明，对上述材料而言，二元线性函数可以用来描述温度和含湿量对导热系数的影响，且温度和含湿量之间的交互作用可以被忽略。对于EPS和岩棉等弱吸湿弱毛细材料而言，可以将二元线性函数简化为仅与温度相关的一元线性函数。
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| 关 键 词： | 导热系数 温度 含湿量 建筑材料 |
| 收稿时间： | 2017-03-15 |
Influence of temperature and moisture content on the thermal conductivity of building materials |
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| Sun Lixin,Feng Chi and Cui Yumeng. Influence of temperature and moisture content on the thermal conductivity of building materials[J]. Journal of Chongqing Jianzhu University, 2017, 39(6): 123-128 |
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| Authors: | Sun Lixin Feng Chi Cui Yumeng |
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| Affiliation: | School of Architecture, Xi''an University of Architecture and Technology, Xi''an 710055, P. R. China;China Academy of Building Research, Beijing 100013, P. R. China,China Academy of Building Research, Beijing 100013, P. R. China;State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510641 P. R. China and State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510641 P. R. China |
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| Abstract: | Thermal conductivity is one of the most important hygrothermal properties of building materials which depends on temperature and moisture content. The one-variable linear function is usually used to describe the influence of either temperature or moisture content on the thermal conductivity when the other one is fixed. However, for real situations temperature and moisture content have simultaneous influence. The thermal conductivities of five typical building materials-expanded polystyrene (EPS), mineral wool, concrete, adhesive mortar and rendering plaster-were measured with the guarded-hot-plate apparatus at different temperature and moisture content. Results show that the two-variable linear function is sufficient to describe the coupled influence of temperature and moisture content on all studied materials. The interaction between temperature and moisture content is negligible. For weakly hygroscopic and capillary materials such as EPS and mineral wool, the two-variable linear function can be simplified to the one-variable linear function of temperature. |
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| Keywords: | thermal conductivity temperature moisture content building material |
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