混凝土内部温湿度响应参数分析:水分扩散系数与导热系数

doi:10.11896/cldb.20040215

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Abstract Moisture diffusion coefficient and thermal conductivity of concrete are the bridges between service environment and concrete internal microenvironment. In this paper, based on Fick's second law of diffusion and Boltzmann transformation, the relationship between internal relative humidity and moisture diffusion coefficient of concrete with different water-cement ratios was obtained. The effects law of relative humidity and water-cement ratio on moisture diffusion coefficient of concrete was revealed. The relationship between thermal conductivity and density of normal concrete at dry state was established, combined with the BSB model of isothermal adsorption, the thermal conductivity model of concrete which considering moisture content was established.

Key words： concrete moisture diffusion coefficient thermal conductivity relative humidity

Published: 01 July 2021

CLC number:

TU528.1

Fund:National Key Research and Development Program of China (2017YFB0310000), Key Research and Development Program of Shandong Province (2019GSF110006), and State Key Laboratory of High Performance Civil Engineering Materials (2019CEM006).

About author:: Lixiao Zhao received his B.S. degree from Shandong Agricultural University in 2016 and M.S. degree from Qingdao University of Technology in 2018. He is currently pursuing his Ph.D. degree at School of Materials Science and Engineering, Southeast University. His research has focused on durability performance of concrete.
Penggang Wang is an associate professor and master supervisor of Qingdao University of Technology. He received his Ph.D degree from Qingdao University of Technology in June 2014 and worked as a postdoctor at Southeast University and Jiangsu Research Institute of Building Science CO. LTD. from 2014 to 2016. From 2019 to 2020, he visited University College London as a visiting scholar. His research interests mainly focus on durability, protection and repair of concrete under marine environment.

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	ZHAO Lixiao
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	WANG Lanqin
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	GUANG Wentao

Cite this article:

ZHAO Lixiao,WANG Penggang,WANG Lanqin, et al. Analysis of Parameters for Temperature and Humidity Response in Concrete: Moisture Diffusion Coefficient and Thermal Conductivity[J]. Materials Reports, 2021, 35(12): 12075-12080.

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http://www.mater-rep.com/EN/10.11896/cldb.20040215 OR http://www.mater-rep.com/EN/Y2021/V35/I12/12075

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