Calculation model of thermal conductivity of concrete based on minimum thermal resistance theory

被引：2

作者：

Chen, Chun ^{[1
]}

Qian, Chunxiang ^{[1
]}

Xu, Yanbo ^{[1
]}

机构：

[1] Key Laboratory for Civil Engineering Materials, Southeast University

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2012年 / 42卷 / 02期

关键词：

Concrete; Minimum thermal resistance theory; Porosity; Thermal conductivity;

D O I：

10.3969/j.issn.1001-0505.2012.02.036

中图分类号：

学科分类号：

摘要：

The traditional calculation model of thermal conductivity of concrete that mechanically compartmentalizes the transfer path of heat flow in concrete material according to its compositions can seldom meet the minimum thermal resistance theory and may lead to large simulation results. Based on the minimum thermal resistance theory, an improved model considering the role of pore in concrete is presented. By introducing the heat transfer area proportion coefficient method, the compartmentalization of heat flow in concrete can meet not only the requirements of the concrete compositions, but also the minimum thermal resistance theory. The thermal conductivity of eight kinds of concrete is calculated by using the model. The deviation between the calculated results and experimental results ranges from -14.0% to +5.1%, while the corresponding deviation scope by the Harmathy model and the Campbell-Allen and Throne model are 4.9%-29.3% and 11.0%-32.1%, respectively. It can be found that the presented model is more accurate than the traditional calculation models of thermal conductivity.

引用

页码：383 / 387

页数：4

共 11 条

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