Thermal Properties of Earth Bricks Stabilised with Cement and Sawdust Residue Using the Asymmetrical Hot-Plane Method
Thermal Properties of Earth Bricks Stabilised with Cement and Sawdust Residue Using the Asymmetrical Hot-Plane Method作者机构：Ecole Nationale Supérieure des Sciences Agros Industrielles Laboratoire de Mécanique Matériaux et Photonique University of Ngaoundéré Ngaoundéré Cameroon Département de Physique/EGCIM Faculté des Sciences et Physique Université de Ngaoundéré Ngaoundéré Cameroon Ecole Nationale Supérieure des Sciences Agros Industrielles Département de Génie Mécanique et Productique University of Ngaoundéré Ngaoundéré Cameroon
出 版 物：《Open Journal of Applied Sciences》 (应用科学（英文）)
年 卷 期：2023年第13卷第11期
页 面：1910-1934页
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
主 题：Clay Brick West Cameroon Thermal Conductivity Asymmetric Hot Surface Thermal Properties
摘 要：This paper presents an experimental study of the characterisation of local materials used in the construction and thermal insulation of buildings. These materials are compressed earth bricks stabilised with cement and sawdust. The thermal conductivity, diffusivity, effusivity, and specific heat of earth-based materials containing cement or sawdust have been determined. The results show that the blocks with earth + sawdust are better thermal insulators than the blocks with simple earth. We observe an improvement in thermal efficiency depending on the presence of sawdust or cement stabilisers. For cement stabilisation, the thermal conductivity increases (λ: 1.04 to 1.36 W·m-1·K-1), the diffusivity increases (from 4.32 × 10-7 to 9.82 × 10-7 m2·s-1), and the effusivity decreases (1404 - 1096 J·m-2·K-1·s-1/2). For sawdust stabilisation, the thermal conductivity decreases (λ: 1.04 to 0.64 W·m-1·K-1), the diffusivity increases (from 4.32 × 10-7 to 5.9 × 10-7 m2·s-1), and the effusivity decreases (1404 - 906 J·m-2·K-1·s-1/2). Improving the structural and thermal efficiency of BTC via stabilisation with derived binders or cement is beneficial for the load-bearing capacity and thermal performance of buildings.
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