INVESTIGATION INTO THE PROPERTIES OF CONCRETE MADE BY PARTIAL REPLACEMENT OF CEMENT WITH MAIZE STEM ASH
Abstract
This study examines the potential of maize stem ash (MSA) as a partial replacement for ordinary Portland cement in concrete production. Laboratory experiments were conducted to evaluate the physical and mechanical properties of concrete incorporating varying percentages (0%, 10%, 20%, 30%, and 40%) of MSA at a water-cement ratio of 0.6. Tests performed include sieve analysis, moisture content, specific gravity, slump test, compaction factor, and compressive strength tests at curing periods of 7, 14, and 21 days. Results indicate that compressive strength decreases with increasing MSA content but improves with curing age. The control mix (0% replacement) exhibited the highest strength, while acceptable strength performance was observed at lower replacement levels. The findings suggest that MSA can be used as a sustainable supplementary cementitious material at limited replacement levels.
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