Détermination des exigences des sols du Mali pour la réalisation des blocs de terre stabilisée (BTS)

This research work aims to determine the requirements of stabilized earth blocks for their effective use in Malian conditions. Indeed, in order to enhance the value of local materials and contribute to reducing construction costs in Mali, earth stabilization studies are essential. The subject of study focuses on determining the requirements for stabilizing raw earth with CPJ 45 Portland cement in order to obtain stabilized earth blocks (or bricks) (BTS) which constitute a very promising technique among the various possible uses of earth and cement materials. Raw earth used in construction in Mali for thousands of years, has mechanical and physicochemical properties that can be improved. In this document, a study analyzing the impact of cement and water dosage on different BTS specimens at different curing conditions was conducted in order to improve the mechanical characteristics of BTS. To do this, we used a laterite from Sénou and located at the National Center for Research and Experimentation in Building and Public Works (CNREX-BTP) whose grain size is located in the spindle of the recommended earth diagram, and whose plasticity is located in the spindle of the recommended earth diagram. In this context, different percentages of cement (4%, 6%, 8%, 10%), and water content (Wopt - 2%, Wopt, Wopt + 2%), were used to make BTS specimens in order to see the variations in compressive strengths and tensile strengths by splitting at 7 and 28 days of curing. The compressive and tensile strengths increase as the cement percentage increases. The variation in the optimum water content of ±2% influences the compressive and tensile strengths, but these strengths are maximum at 15.10% water dosage which corresponds to the optimum water content. Stabilization with cement generally depends on the granulometry and plasticity of the earth used, the cement dosage, the water content, and the curing of the blocks. The tests described in this document were carried out at the National Center for Research and Experimentation in Buildings and Public Works (CNREX-BTP), in Bamako. Keyswords : Stabilized earth block, Stabilization, Material characteristics, Resistance, Compression, Traction.