<abstract xmlns="http://www.w3.org/1999/xhtml"><p> We numerically investigated moisture transfer in buildings made of concrete. We considered three types of concrete: normal concrete, pumice concrete and cellular concrete. We present the results of a 1-D liquid water flow in such materials. We evaluated the moisture distribution in building materials using the Runge-Kutta fourth-and-fifth-order method. The DOPRI5 code was used as an integrator. The model calculated the resulting moisture content and other moisture-dependent physical parameters. The moisture curves were plotted. The dampness data obtained was utilized for the numerical computation of the coefficient of the capillary conductivity of moisture. Different profiles of this coefficient are represented. Calculations were performed for four different values of the outdoor temperature: -5°C, 0°C, 5°C and 10°C. We determined that the curves corresponding to small time intervals of wetting are associated with great amplitudes of the capillary conductivity . The amplitudes of the coefficient of the capillary conductivity decrease as the time interval increases. High outdoor temperatures induce high amplitudes of the coefficient of the capillary conductivity.</p></abstract>

We numerically investigated moisture transfer in buildings made of concrete. We considered three types of concrete: normal concrete, pumice concrete and cellular concrete. We present the results of a 1-D liquid water flow in such materials. We evaluated the moisture distribution in building materials using the Runge-Kutta fourth-and-fifth-order method. The DOPRI5 code was used as an integrator. The model calculated the resulting moisture content and other moisture-dependent physical parameters. The moisture curves were plotted. The dampness data obtained was utilized for the numerical computation of the coefficient of the capillary conductivity of moisture. Different profiles of this coefficient are represented. Calculations were performed for four different values of the outdoor temperature: -5°C, 0°C, 5°C and 10°C. We determined that the curves corresponding to small time intervals of wetting are associated with great amplitudes of the capillary conductivity . The amplitudes of the coefficient of the capillary conductivity decrease as the time interval increases. High outdoor temperatures induce high amplitudes of the coefficient of the capillary conductivity.

Moisture Transfer in Concrete: Numerical Determination of the Capillary Conductivity Coefficient

Enviromental Energy Technology Laboratory, EETL, Physics Department, Faculty of Science, University of Yaounde I, B. P. 7268 Yaounde,

Department de Physique, Ecole Normale Superieure du Cameroon, B.P. 47 Yaounde,

Slovak Journal of Civil Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

We numerically investigated moisture transfer in buildings made of concrete. We considered three types of concrete: normal concrete, pumice concrete and...

Moisture Transfer in Concrete: Numerical Determination of the Capillary Conductivity Coefficient

Published Online: Apr 01, 2017

Page range: 10 - 18

DOI: https://doi.org/10.1515/sjce-2017-0002

Keywords
Concrete, Moisture content, Diffusion, Coefficient of the capillary conductivity, DOPRI5 integrator

© Faculty of Civil Engineering, Slovak University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Moisture Transfer in Concrete: Numerical Determination of the Capillary Conductivity Coefficient

Published Online: Apr 01, 2017

Page range: 10 - 18

DOI: https://doi.org/10.1515/sjce-2017-0002

KeywordsConcrete, Moisture content, Diffusion, Coefficient of the capillary conductivity, DOPRI5 integrator

© Faculty of Civil Engineering, Slovak University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
Concrete, Moisture content, Diffusion, Coefficient of the capillary conductivity, DOPRI5 integrator