Performance Characterization OF Sustainable Green Concrete Blends WITH Calcium Carbide Residue AND Rice Husk Ash: A Comparative Study
DOI:
https://doi.org/10.64252/dbv8zb41Keywords:
Green concrete, Calcium carbide residue, Rice husk ash, Compressive strength, Durability, Workability.Abstract
Background: The construction industry’s heavy reliance on cement contributes significantly to global CO₂ emissions. To address environmental and resource challenges, the incorporation of industrial and agricultural by-products like calcium carbide residue (CCR) and rice husk ash (RHA) into concrete presents a sustainable alternative.
Gap: Although the individual use of CCR and RHA in concrete has been explored, their combined effect remains under-researched, especially regarding strength–durability–workability relationships.
Methodology: This study investigates the mechanical and durability performance of green concrete mixes with varying proportions of CCR and RHA (5% to 15% each) replacing cement. Tests conducted include compressive strength (7, 28, 56 days), split tensile and flexural strength, slump, water absorption, chloride penetration, and microstructural analysis.
Findings: The mix containing 15% CCR and 15% RHA (M5) achieved the highest 28-day compressive strength of 38.8 MPa, outperforming the control mix (35.1 MPa). Durability improved by 10–15%, with reductions in water absorption and chloride permeability. However, slump decreased from 90 mm (CM) to 60 mm (M5), indicating reduced workability.
Novelty: The study presents a synergistic use of CCR and RHA as a dual cement replacement system, demonstrating improved mechanical and durability performance while promoting waste valorization.
