Influence of Locally Sourced Waste Foundry Sand on Workability and Compressive Strength of Normal-Strength Concrete
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Date
2022
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Afe Babalola University, Ado-Ekiti (ABUAD)
Abstract
Since the early nineteenth century, sustainable utilization of industrial by-products and agro-residue ashes have been at the
forefront of researches owing to the impacts of rapid urbanization and development. This study presents experimental work on the re
utilization of already discarded waste foundry sand (WFS) sourced from local iron pot maker in Osogbo, Osun State. Fine aggregate was
partially replaced with three different compositions of WFS (0, 10, 20 and 30%) using batching by weight method. The slump cone test
was performed on the fresh concrete samples in order to determine their workabilities while the compressive strength test was performed
at 7th, 21st and 28th-day curing ages. The compressive strength test is most used to assess the load-bearing capacity of concrete. The
hardened densities for the concrete samples were also established at 7th, 21st and 28th-day curing ages. Results from the compressive
strength test showed that as more WFS was incorporated into concrete mixes, so does the compressive strength increases across all curing
ages. The results also showed a marginal increase in compressive strengths at 28th-day curing age in concrete samples containing WFS.
Slump values for the concrete samples increase as more WFS is incorporated into mixes with exception of 30% WFS whose slump value
decrease slightly compared to samples containing 10% of WFS. The hardened densities of concrete samples fall within 2200 - 2600kg/m3
which is regarded as the density of normal-weight concrete across all curing ages. Based on these results, WFS sourced locally can
effectively and efficiently be utilized to produce plain concrete.