Yemalin AGOSSOU : Etude de la mise en œuvre du rotin et du rônier comme armature des nervures et armatures de paillasse de la table de compression en béton de latérite

Abstract:
The construction sector is one of the main responsible for the impact of the production of industrial materials on climate change since it is the largest consumer of energy and the second emitter of CO2 in the world. The depletion of certain material deposits is also one of the problems facing humanity. It is therefore important to create eco-friendly buildings, which consume little energy and emit less greenhouse gases over their entire life cycle. This study is part of a general issue of developing innovative construction materials with low environmental impact. For this purpose, it offers concrete based on laterite aggregate with substitution of the steel reinforcements by those made of palmwood (Borassus Aethiopum) and rattan (Calamus Dearatus) for the realization of parts of reinforced concrete structures, more specifically the floors.
This study was carried out on the laterite from the ATOTINGA quarry in the commune of ALLADA in Benin where we carried out its physical and mechanical characterization and proposed a method for strength to 27.52 ± 0.32 MPa with modulus of elasticity of 17920 ± 324MPa.
The proposed plant reinforcements have respectively developed a tensile strength in tension parallel to the fibers of palmwood and rattan lianas of 156 MPa and 22 MPa. The adhesion measured between the laterite concrete and the palmwood reinforcement in various ways has shown that this adhesion can reach 4 MPa. These performances validated our approach of developing a floor made with eco-friendly materials. It appears that the floor thus developed to have spans greater than 3.50 m. The dimensioning of the beam of this latter, according to the BAEL 91 modified 99 standard, reveals that a 25 mm diameter reinforcement section could effectively be a solution to the realization of a floor. However, the analytical study of the beam thus dimensioned compared to the numerical simulation using the ABAQUS software made it possible to understand the deformation state. It also shows the structural effectiveness and efficiency of a hollow body floor in laterite concrete reinforced with palmwood and rattan in the realization of modern social housing floors with spans up to 3.5 meters

Key words:
Laterites, aggregates, concrete, formulation, mechanical properties, palm tree, rattan

Composition of the jury:
> Examiner:
- Mme Yvette TANKPINOU KIKI, MCF, HDR Université Nationale des Sciences Technologies, Ingénierie et Mathématiques, Bénin
> Reporters:
- M. Abdelhamid BOUCHAIR, PR , Polytech Clermont-Ferrand
- M. Adamah MENSAN, MCF, HDR Institut International d’Ingénierie  de l’Eau et de l’Environnement (2IE) – Burkina Faso
> Direction of thesis:
- M. Edmond ADJOVI, Directeur de thèse, PR, Université d’Abomey-Calavi
- M. Abdelouhab KHELIL, Directeur de thèse, PR, Université de Lorraine, IJL
- M. Emmanuel OLODO, Co-directeur de thèse, PR Université d’Abomey-Calavi
- M. Rémi BOISSIERE, Co-directeur de thèse, MCF, Université de Lorraine, IJL
> Guests:
- Mme Cécile DILIBERTO, MCF, HDR Université de Lorraine, IJL
- M. André LECOMTE, PR, Université de Lorraine