Abstract
This paper reports on the hygrothermal behaviour of a new bio-based composite building material, based on recycled wood fibres used as eco-aggregate within a cementitious matrix. A coupled heat and moisture transfer was established through the material and resolved numerically with a model developed herein. Relative humidity and temperature were chosen as driving potentials. The hygric and thermal properties of the material were analysed and then used as input parameters in the model. The accuracy of the latter was verified by comparing the simulation results with experimental hygrothermal tests, from which the moisture buffering value (MBV) could be determined. The MBV showed that the wood-cement composite material might contribute to improve the indoor thermal comfort and be relevant for low-energy building design.
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