Suitability of Awka-North (Nigeria) Sedimentary stones as Coarse Aggregate for Building Construction
Journal Title: International Journal of Engineering and Science Invention - Year 2018, Vol 7, Issue 1
Abstract
The research was conducted to investigate properties and strength behaviour of concrete incorporating Awka-North sedimentary stones (locally known as‘ironstone’) as coarse aggregate in concrete. Ironstone is abundantly available in eastern Nigeria especially Anambra and Enugu states. Though its engineering properties have not been investigated, it is being utilized as coarse aggregates in structural concrete around the locality due to its abundance and relative cheapness. Replacement of ironstone with crushed granite and river gravel up to 50% in 1:2:4 concrete was carried out. Cubes and beams of this concrete mix were cast and tested at different maturity dates to investigate compressive and flexural strengths among other physical properties. Optimum results were obtained at 50% replacement ofironstone with crushed granite or river gravel resulting in compressive strength of 22 N/mm2 anda flexural strength of 7.81N/mm2 at 28days. Economic analysis of producing 1m3 ironstone-optimized concrete reveals a 15-20% reduction in the cost of optimum concrete mix production when compared to the use of conventional aggregates like crushed granite or river gravel. Use of ironstone in concrete production is recommended at 50% replacement of ironstone with conventional aggregates.
Authors and Affiliations
Emmanuel Owoichoechi Momoh, Aondoseer Abraham Atoo, David Nwakonobi
Keywords
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