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Ubachukwu, O. A.
Department of Civil Engineering, Michael Okpara University of Agriculture, Umudike, P.M. B. 7267, Abia State, Nigeria
Okafor, F. O.
Department of Civil Engineering, University of Nigeria, Nsukka, Enugu State, Nigeria
Aja, M.
Department of Civil Engineering, Michael Okpara University of Agriculture, Umudike, P.M. B. 7267, Abia State, Nigeria
Mbama, E.
Department of Civil Engineering, Michael Okpara University of Agriculture, Umudike, P.M. B. 7267, Abia State, Nigeria
ABSTRACT
There
is compelling need to confront the menacing effects of solid wastes;
particularly, waste glass. This has necessitated research into the recycling of
crushed waste glass as partial replacement of sand, which is a fast-depleting
natural resource in concrete. Disposal of crushed waste glass in landfills is
not an option. The landfills are not readily available; when seen,
affordability becomes another problem. In this experimental study, sand in
concrete is partially replaced with crushed waste glass (CWG) at incremental
rate of 5% up to 25%. Standard mix ratio of 1:2:4 was adopted in three
replicates. The homogenous concrete mix was cast in 150mm3 metal mold
to produce 72 concrete cubes which were cured for 3, 7, 14 and 28 days. The results
of fresh and hardened properties of sand-CWG reveal that the introduction of
CWG improved the workability of sand-CWG concrete by 33.33% from 0 to 10%,
after which the concrete became less workable. Also, the density of the
concrete reduced by 9.7% as the replacement level increased from 0 to 25%,
resulting in lighter weight concrete. It was also observed that as the
hydration period increased from 3 to 28 days, the compressive strength
continued to increase for all percentage replacement level; but, slightly
decreased with increase in partial replacement from 25Nmm-2 to
18.06Nmm-2 for 0 and 25% respectively. It was concluded that
environmental nuisance constituted by waste glass can be mitigated by using it
to partially replace sand in concrete.
Keywords: crushed waste glass; concrete; sand; partial replacement, aggregates
https://doi.org/10.33922/j.ujet_v7i1_1
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Published
Tuesday, June 01, 2021
Issue
Vol. 7 No. 1, June 2021
Article Section
GENERAL
The contents of the articles are the sole opinion of the author(s) and not of UJET.
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