Moisture transfers in perforated bricks

The transfers of moisture through the walls are critical for the energy consumption of the building, the comfort and health of the inhabitants, the aesthetics and the durability of the construction. The data available from the CE marking of perforated bricks can be used to compute the moisture transfers through brick walls.

Through measurements and finite element calculations, it was shown that it is possible to calculate the moisture-related properties of perforated bricks when the properties of the ceramic material are known. This will reduce test time and improve measurement quality.

1 Introduction

The calculation of the static energy transfer through the brick walls of a building has become state of the art. From the thermal conductivity of the ceramic material, the equivalent thermal conductivity of the perforated brick can be estimated according to EN 1745 for example and the heat losses through the wall are computed. Usually, the calculation required by the standards assumes that the wall has a uniform constant low moisture content corresponding to the moisture in equilibrium with the external atmosphere. Often a humidity of the external atmosphere of 80% is selected....

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