COMPARATIVE STUDY ON THE POZZOLANIC PROPERTIES OF MILLET HUSK ASH AND RICE HUSK ASH AS PARTIAL CEMENT REPLACEMENT IN CONCRETE
Abstract
ABSTRACT
This study explores the potential of agricultural waste ashes rice husk ash (RHA) and millet husk ash (MHA) as sustainable partial replacements for Portland cement in concrete production. The research investigates their chemical composition, production methods, and effects on concrete's workability, strength, and durability. Laboratory experiments involved controlled burning of rice and millet husks, chemical analysis via XRF, and testing concrete mixes with 5%, 10%, and 15% ash replacements over curing periods of 7, 14, and 28 days. Results indicate that RHA, with silica content exceeding 70%, exhibits high pozzolanic reactivity, leading to improved early strength and durability. MHA, with moderate silica content (~39%), shows promise when produced under standardized conditions, especially at 10% replacement.
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