RAZIKA CHARIME
hebhoub houria
ABDELOUAHED ASSIA
boughamsa wassila
Abstract
The valorization of waste in building materials has now become widely of great concern, facing the economic, technical and environmental problems encountered. Resulting on the one hand from the high price of aggregates; the gradual exhaution of natural resources; and the high costs of waste management and disposal, on the other hand. For this purpose, our research topic was developed, focusing on the formulation of a sand concrete, using dune sand available in sufficient quantities in Algeria and local waste, specifically limestone filler and biomass ash as cementitious addition by a partial substitution of portland CEM I cement at dosages of 0%, 8% and 24%; and the parameter water-to-cement ratio was maintained constant for all the mixes. A comparative study between the different ash-based concretes and a control one was carried out by studying their properties in the fresh and hardened states. The results obtained show that the properties of the fresh concrete (workability and density) and the mechanical characteristics (compressive and tensile strength at 28 days) vary according to the substitution rate of the addition used and the incorporation of 8% of biomass ash increases the workability; leads to an evolution of the density and improves the compressive and the tensile strength of the dune sand concrete.
Keywords
Sand concrete; Waste; Valorization; Biomass ash; Cementitious addition; Properties
