Replacement of Sand with Bauxite Mining Waste in Concrete Production
Replacement of Sand with Bauxite Mining Waste in Concrete Production
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Date
2019-09-24
Authors
Danso,Humphery
Boadi,J.k.
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Research Paper
Abstract
he use of natural sand as fine aggregate in concrete is becoming problematic due to
scarcity and pressure on mining of the resource. Alternate sources such as the use of
industrial waste as replacement of natural sand in concrete are gaining popularity as a
sustainable construction material. The aim of this study is to examine the possibility of
using bauxite mining waste as a fine aggregate replacement for concrete production. The
quantities of sand replaced with bauxite mining waste used are 0, 25, 50, 75 and 100%.
Cube, cylinder and beam specimens were molded and cured for 7, 14, 21 and 28 days, and
tested for density, compressive strength, tensile splitting strength and flexural strength.
The study found that there was a slight increase in density of bauxite mining waste
produced concrete over the control as the quantity of bauxite residue increased. The study
further revealed a significant increase in compressive, tensile splitting and flexural
strengths of the concrete produced with bauxite residue as compared with the control, with
an increase between 60.3 and 65.5%. Additionally, a good correlation was established
between the bauxite contents and the density of concrete produced with bauxite mining
waste, recording R2 values between 0.9749 and 0.9896. The 100% bauxite residue
replacement of sand obtained the highest strength properties in the concrete. The study,
therefore, concludes that it is feasible to use bauxite mining waste as a fine aggregate
replacement in concrete production. It is recommended that further studies should be
conducted on the durability and chemical properties of concrete produced with bauxite
mining waste as the current study only focused on the strength properties.
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Danso, H., & Boadi, J. K. (2019). Replacement of Sand with Bauxite Mining Waste in Concrete Production. Journal of Materials and Engineering Structures «JMES», 6(4), 525-534.