Thermal Properties of Earth Bricks Stabilised with Cement and Sawdust Residue Using the Asymmetrical Hot-Plane Method  

作　　者：Gabin Alex Nouemssi Guy Edgar Ntamack Martin Ndibi Mbozo’O Bonaventure Djeumako Gabin Alex Nouemssi;Guy Edgar Ntamack;Martin Ndibi Mbozo’O;Bonaventure Djeumako(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)

机构地区：[1]Ecole Nationale Supérieure des Sciences Agros Industrielles Laboratoire de Mécanique, Matériaux et Photonique, University of Ngaoundéré, Ngaoundéré, Cameroon [2]Département de Physique/EGCIM, Faculté des Sciences et Physique, Université de Ngaoundéré, Ngaoundéré, Cameroon [3]Ecole Nationale Supérieure des Sciences Agros Industrielles, Département de Génie Mécanique et Productique, University of Ngaoundéré, Ngaoundéré, Cameroon

出　　处：《Open Journal of Applied Sciences》2023年第11期1910-1934,共25页应用科学（英文）

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.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.

关 键 词：Clay Brick West Cameroon Thermal Conductivity Asymmetric Hot Surface Thermal Properties 

分 类 号：TG1[金属学及工艺—金属学]