TITLE:
Thermal Properties of Earth Bricks Stabilised with Cement and Sawdust Residue Using the Asymmetrical Hot-Plane Method
AUTHORS:
Gabin Alex Nouemssi, Guy Edgar Ntamack, Martin Ndibi Mbozo’O, Bonaventure Djeumako
KEYWORDS:
Clay Brick, West Cameroon, Thermal Conductivity, Asymmetric Hot Surface, Thermal Properties
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.13 No.11,
November
16,
2023
ABSTRACT: 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.