Concrete has been universally known as conventional building material, which has great effect on walling unit of building production and its component. This experimental study sought the strength parameter of concrete produced with partial replacement of granite with 25% of Periwinkle and 25% Palm kernel shells respectively for future intending use.12 concrete cubes were produced with design mix of 1: 1½: 3 concrete and they were cured for 7, 14, 21 and 28 days to attain maximum strength. Physical properties conducted on the materials were specific gravity (SG), water absorption (WA), grain size distributions, dry and bulk density and mechanical property was also determined through compressive strength to analyze the strength parameter of the concrete. The outcome of the mean strength of three concrete cubes produced, revealed that it increased as the age of concrete progresses from 9.93 N/mm2 at 7 days, to 12.35 N/mm2 at 14 days, 13.73 N/mm2 at 21 days, and as high as 14.93 N/mm2 at 28 days respectively. Therefore, a design mix of 1: 1½: 3 of concrete produced with 25% Periwinkle and 25% Palm kernel shells is advised to be used for lightweight concrete and non-load bearing components in building especially pedestrian, non-motorable way, kerbs for cost effective and waste reduction.
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