Thermophysical Characterisation of a Raw Earth Brick Stabilised by the Addition of Cow Bone Ash Use in Construction

Local materials have been attracting attention in many countries for some time now. The performance of these materials in terms of durability and resistance makes them an asset in the choice of building structures. This article is based on an experimental study of the thermophysical characterisation of a raw earth brick made from bovine bone ash. We chose clay-based raw earth from the locality of Pitoa-Sonayo in the North Cameroon Region. Thermal effusivity, volumetric heat capacity and thermal conductivity were studied. The acronym Pitoa-Sonayo (PS) is used to represent the Pitoa-Sonayo samples. The laboratory results gave a thermal conductivity of 0.46. An average of 0.81% was obtained for the 0% added bovine ash content; 0.65% for the 2% content; 0.58% for the 4% content; 0.52% for the 6% content and 0.47% for the 8% content. Thermal effusivity ranged from 651.23 to 761.30. These results obtained in relation to the tests carried out show that the thermophysical characterisations carried out make it possible to specify the optimum conditions for using these raw earth briquettes and guarantee energy savings and respect for the environment.