Abstract
The aim of this study is to improve the proprieties of the mixtures of rice straw and laterite. Thus, we conduct this study related to the mixtures of rice straw, laterite and cement for their use as building material. The lateritic formations represent the most abundant economical materials resources available in tropical and equatorial Africa. Rice straw is rich in cellulose. Consequently, few animals are able to use it as food. We have determined by experiments the mechanical and thermal properties of samples. The Interesting results obtained show that the integration of mixtures of rice straw, laterite and cement in building materials are great opportunities to reduce the cost of social housing. It also improves the thermal comfort.
Highlights
In previous studies, we are interested in the valorization of mixture of laterite with rice straw through its integration in construction material (Sow et al, 2014).to improve the proprieties of these materials we interested in mixing them with Portland cement.Portland cement is a hydraulic binder
Portland cement CEM II / B-LL 32.5R is composed of 65-79% clinker, 21-35% limestone with a total organic carbon content (TOC) of less than or equal to 0.20% by mass and 0 to 5% fillers (Norm EN197-1, 2001; Norm AFNOR P 15-101-1, 2001)
To have in parallel the mechanical and thermal characteristics, we represented them in Fig. 4.This Fig. 4 shows that the most optimal mixture is composed of 30% of cement and 70% of optimum.This most optimal mixture has a thermal resistance of 1.739 m2K/W, for a wall thickness of 20 cm and a compressive strength of 0.979 MPa
Summary
We are interested in the valorization of mixture of laterite with rice straw through its integration in construction material (Sow et al, 2014).to improve the proprieties of these materials we interested in mixing them with Portland cement.Portland cement is a hydraulic binder. We are interested in the valorization of mixture of laterite with rice straw through its integration in construction material (Sow et al, 2014). To improve the proprieties of these materials we interested in mixing them with Portland cement. It is the product obtained by reducing clinker powder consisting essentially of hydraulic calcium silicates and a small quantity of gypsum (hydrated calcium sulphate). Gypsum is a mineral used to delay and regulate the taking and hardening of cement (Norm EN 197-1, 2001; Norm AFNOR P 15-101-1, 2001). The rice straw and the laterite are available in the open country (Demarquilly, 1987; BCEOMCEBTP, 1975)
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