Optimization of Bagasse Fiber Mixture in the Manufacture of Precast Concrete Based on Pressure Test

Abstract The World Cement Association reported in 2024 that global demand for cement continues to rise, despite the material’s non-renewable nature and significant environmental impact, contributing to 8% of total CO₂ emissions. This research explores the use of bagasse fiber as a partial substitute for cement in concrete production to reduce cement consumption, produce eco-friendly concrete, and repurpose sugar industry waste. The study aims to determine the optimal composition of bagasse fiber in precast concrete by evaluating compressive strength. Using a quantitative, experimental method, 30 concrete samples with varying bagasse fiber content—0%, 5%, 10%, 25%, and 30%—were tested for compressive strength, with six samples per variation. Bagasse fiber content was the independent variable, while compressive strength was the dependent variable, measured in accordance with SNI-7394-2008 standards. Results indicated that increasing bagasse fiber content decreased concrete compressive strength. Samples with 30% bagasse fiber achieved 0.62 MPa at 14 days and 0.91 MPa at 28 days, meeting the criteria for lightweight, low-strength concrete (0.35-7.00 MPa) suitable for heat-retaining walls. This study contributes to sustainable construction by reducing bagasse waste and promoting accessible, eco-friendly concrete production for small and medium-sized enterprises.