Prospect of Recycled Coarse Aggregate for Concrete Production in Nigeria

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Ameh, O. J.
Edike, U. E.
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Covenant Journal of Research in the Built Environment
The non-degradable nature of concrete waste from demolition and collapsed building sites, coupled with environmental degradation and exposure to heavy metals in the process of extracting aggregate constitute hazards to health and the environment. This study focused on the prospect of recycled coarse aggregate for concrete production. The coarse aggregate component of normal concrete was replaced with 25%, 50%, 75% and 100% Recycled Coarse Aggregate (RCA) in a 1:2:4 cement, sand and aggregate mix proportion and 0.5 water/cement ratio. Result shows that workability, saturated bulk density, compressive strength and flexural strength decreases with increase in RCA content in concrete. 100% manually recycled coarse aggregate concrete passed the 17 kN/m2 compressive strength limit generally acceptable for concrete work of non high strength requirement without additive. The research therefore recommends the use of recycled coarse aggregate concrete for plain low strength concrete elements for buildings. The economic benefit of RCA concrete includes efficient reuse of recovered coarse aggregate from demolished and collapsed buildings and to avert risk to health and the environmental.
Staff Publications
Coarse aggregate recycled concrete , Engineering properties , Sustainable construction , Nigeria , Research Subject Categories::TECHNOLOGY::Other technology
Ameh, O. J. & Edike, U. E. (2014). Prospect of recycled coarse aggregate for concrete production in Nigeria. Covenant Journal of Research in the Built Environment, 2(1), 1-16