Effect of moisture and temperature on thermal properties of three bio-based materials

• Published in: Construction & building materials Vol. 111; pp. 119 - 127
• Main Authors: Rahim, M., Douzane, O., Tran Le, A.D., Langlet, T.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.05.2016; Elsevier B.V; Elsevier
• Subjects: Analysis; Concrete; Engineering Sciences; Flax concrete; Hemp concrete; Specific heat capacity; Straw concrete; Temperature; Thermal conductivity; Thermal properties; Water content; United States; Hemp concrete; Temperature; Flax concrete; Water content; Thermal conductivity; Specific heat capacity; Straw concrete
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2016.02.061

•Two news bio-based materials “Straw-rape and Flax concretes”.•Experimental protocol validation with the reference material (hemp concrete).•Measurement of physical–thermal properties of studied materials.•Investigation of the affect temperature and moisture on the thermal conductivity.•Modeling and validation of thermal conductivity by self-consistent scheme model. This article focuses on the investigation of the thermal properties of three bio-based materials called hemp concrete, flax concrete and rape straw concrete. The results showed that these materials have an interesting heat storage capacity and a low thermal conductivity, which provides a good thermal insulating capacity. For a range of temperature from 10 to 40°C, the effects of temperature and water content on thermal conductivity are important. The self-consistent scheme (SCS) model is applied to model the thermal conductivity of the materials depending on their initial components. Compared with the experimental measurement, the SCS model gives satisfactory results for the studied materials.