Application of Accelerated Carbonation and water curing for development of superplasticed Self Compacting Concrete
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Date
2022
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Abstract
The growing shortage of raw materials coupled with the vital requirement to
shield the ecosystem from pollution has heightened the need to develop novel
construction materials from agricultural wastes. Therefore, the goal of this
work was to determine the properties of GCHA blended Self Compacting
Concrete (SCC) using Accelerated Carbonation Curing (ACC) and water
curing methods. Portland limestone cement, Guinea Corn Husk Ash
(GCHA), sand, water and granite dust were tested for fineness, coarseness,
specific gravity before being used to produce the concrete samples. The
concrete was also investigated for its flowability parameters. Also, Scanning
Electronic Microscopy (SEM), Energy Dispersive X-Ray Fluorescence
Spectrometer (EDXRF, X-Ray Diffraction (XRD) were carried out to
determine the properties of the GCHA. The mix ratios for the self
compacting concrete were developed and optimized to obtain an optimal
compressive strength. The optimum combinations of percentage of GCHA
and cement in ACC that gave a compressive strength of 21.369 N/mm2 in 56
days are 25 % and 412.5 kg/m3 respectively. The flowability properties such
as slump flow T50 was obtained at 5 seconds, slump flow was 690 mm, L
box was 0.88mm and V-funnel was 6 seconds for ACC. The optimum
combinations of percentage of GCHA and cement in WC that gave a
compressive strength of 19.6274 N/mm2 in 56 days are 25 % and 412.5
kg/m3 respectively. The flowability properties such as slump flow T50 was
obtained at 6 seconds, slump flow was 700 mm, L-box was 0.81mm and V
funnel was 5 seconds for WC. Therefore, the optimal combinations for ACC
and WC can be used in reinforced concrete production.