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Communication Dans Un Congrès Année : 2012

Effect of coating on the hygric performance of a hemp concrete wall

Résumé

Constructions built with environmentally friendly materials like hemp concrete know currently a real development thanks to their low environmental impact and their interesting thermo-hydric properties. Their porous structure presents lots of advantages in terms of life quality compared with usual concretes. An experimental facility is designed to measure temperature and relative humidity within a hemp concrete wall (30 cm thick) submitted to climatic solicitations. This facility provides a set of experimental data suited for benchmarking a 1D HAM model. In the present work, the wall is submitted to relative humidity gradient under almost isothermal conditions. Comparisons between numerical and experimental data are performed. The results indicate that the use of main wetting curve is suited to describe the storage capacity of the material. However the use of hysteresis modelling is able to improve the description of drying stages. The hydro-thermal properties of the same wall coated on one side with traditional hemp lime render are then investigated numerically. The coating effect on relative humidity distributions is analysed. The ability of the coating to regulate moisture is pointed out.

Domaines

Génie civil
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Dates et versions

hal-00801140 , version 1 (15-03-2013)

Identifiants

  • HAL Id : hal-00801140 , version 1

Citer

Yacine Aït Ouméziane, Sophie Moissette, Marjorie Bart, Christophe Lanos. Effect of coating on the hygric performance of a hemp concrete wall. 5th IBPC, May 2012, Kyoto, Japan. pp.109-116. ⟨hal-00801140⟩
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