MATEC Web Conf.
Volume 240, 2018XI International Conference on Computational Heat, Mass and Momentum Transfer (ICCHMT 2018)
|Number of page(s)||5|
|Section||Heat, Mass and Momentum Transfer|
|Published online||27 November 2018|
Thermal and water transfer in cementitious porous medium: thermal building and durability
LMT / ENS Cachan / CNRS / Paris-Saclay University, 61 avenue du Président Wilson, 94235 Cachan, France
2 EPMI, F-95092 Cergy Pontoise, France
* Corresponding author: firstname.lastname@example.org
Cementitious materials are typical porous medium, which are widely used in civil engineering and thermal buildings. The thermal and hydrate properties of the material are fundamental to predict accurately the energy needs and the reliable duration of the structures in a long term. Due to the complicated coupling, the thermal capacity, conductivity and source term in energy equation are affected by the humidity distribution and the microstructure evolution of the porous materials. The coupling relation of thermal and hydrate properties are summarized in this work, the coupled drying model is discussed, and the experiment is performed to verify the simulation results for RH (Relative humidity) and ML (Mass loss). Two approaches are adopted to estimate the humidity/water content profile in the porous medium and to analyse the temperature effect. In addition, the equivalent hydrate capacity and conductivity are identified as function of humidity. The significance of this work lies in predicting the energy demand, the long-term thermal behaviour, taking into account the change of the thermal cementitious materials properties during their service time. Such inner structure is consequence of the system durability where the temperature, water content and humidity will act on the cracks settling within the material.
© The Authors, published by EDP Sciences, 2018
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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