Volume 4, 2019
|Number of page(s)||10|
|Section||Sustainable Building Materials and Construction|
|Published online||27 September 2019|
Hygrothermal behaviour of straw bale walls: experimental tests and numerical analyses
Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, Brescia, Italy
* e-mail: email@example.com
Accepted: 5 September 2019
Straw is an organic material with hygroscopical properties. The high capacity it has of storing moisture from the surroundings can furthermore influence the performance and lead to the possible degradation of the material thereof. The aim of this study was to assess the conductance C-value of a complex material such as straw. A climatic chamber was used to study a sample, which reproduces a traditional plastered straw bale wall. Tests were conducted under different boundary conditions, setting constant values for temperatures and relative humidity. The revision of the assessment's results allowed the calculation of conductance and conductivity values under different conditions. A numerical model was then designed starting from the laboratory data, which was used to characterize material properties. The match between software simulations and laboratory analyses will be a starting point for further tests. Determining the straw conductance C-value is a difficult task to achieve, due to the complexity and the unique properties of the material. In spite of all this, laboratory tests have shown encouraging results, which reflect the great potential of straw as a building material.
Key words: straw bales / experimental studies / hygrothermal performance / thermal transmittance / natural building material
© A. Mesa and A. Arenghi, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (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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