Application of Kenaf Fibre for Minor Reinforcement in Concrete Production

Abstract

In this study, the effects of employing kenaf fibre as a reinforcement material in concrete on workability and compressive strength are examined. Workability and compressive strength tests were conducted on concrete mixtures containing 0%, 0.5%, 1.0%, and 1.5% kenaf fibre at 7, 14, 21, and 28 days of curing. As the kenaf fibre percentage increased, the slump test results demonstrated a decrease in workability; values decreased from 85 mm for the 0% fibre mix to 25 mm for the 1.5% fibre mix, suggesting a stiffer mix. According to tests of compressive strength, the 0.5% kenaf fibre combination offered better crack resistance while maintaining strength. Compressive strengths at 28 days were found to be 21.80 N/mm2 for the 0% fibre mix, 20.10 N/mm2 for the 0.5% fibre mix, and lower for higher fibre percentages. According to these findings, the ideal content for preserving structural integrity and including long-lasting reinforcing qualities is 0.5% kenaf fibre. The potential of kenaf fibre for environmentally friendly building is highlighted in this study, which also suggests more research into enhancing workability through fibre composition, durability, and admixture usage optimization.