Contribution à la valorisation des déchets dans les matériaux de construction

Abstract

. This study aims to valorize medical mask waste by incorporating it into lime- and cement-stabilized adobe bricks to enhance their mechanical and thermal properties, thereby developing a sustainable construction material with optimized performance. The experimental program was divided into two main stages: In the first stage, the effect of adding lime and cement at rates ranging from 2% to 10% was studied on three types of local soils. The results showed that adding 8% lime increased the compressive strength by 101% for soil B, while adding 10% cement achieved the best overall mechanical performance, along with a significant reduction in water absorption. The second stage involved incorporating medical mask waste with dimensions of 0.5 × 1 cm² and 1 × 2 cm² at rates ranging from 0% to 40%. The results revealed an improvement in thermal insulation of 53.39% at a 40% incorporation rate and 1 × 2 cm² size. Additionally, compressive and flexural strength increased by 10.59% and 13.49%, respectively, for low incorporation rates (5% and 10%) with the smaller 0.5 × 1 cm² size. These results confirm that combining adobe bricks, traditional stabilization techniques, and the valorization of medical mask waste constitutes a promising option for producing sustainable construction materials with improved mechanical and thermal performance while reducing environmental impact.