TOWARDS THE DESIGN OF STRUCTURAL ELEMENTS FOR CONSTRUCTION BASED ON POLYLACTIC ACID AND COCOA PODS OF CAMEROONIAN ORIGIN
VERS LA CONCEPTION D'ELEMENTS STRUCTURAUX POUR LA CONSTRUCTION A BASE D'ACIDE POLYLACTIQUE ET DE CABOSSE DE CACAO D'ORIGINE CAMEROUNAISE
Résumé
The production of cocoa beans (4.9 million tons globally) generates at least ten times that amount in empty cocoa pods. These waste products, often used as natural fertilizer, are nevertheless rich in chemical compounds that are still largely underutilized. This study aims to develop innovative and biodegradable materials based on polylactic acid (PLA) and cocoa husks using twin-screw extrusion to create structural elements that are durable, high-performing, and environmentally friendly. Furthermore, these materials will be combined to design earth bricks with improved characteristics, particularly in terms of mechanical strength, durability, and thermal and acoustic properties. Physical and mechanical characterization tests will therefore be carried out to evaluate the behavior of these new materials under different stresses. Ultimately, this research aims to valorize agricultural by-products, promote a local circular economy, reduce construction costs, while contributing to environmental protection and improved thermal comfort in buildings.
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