International Journal of Advanced Engineering Application

Performance Evaluation of Fly Ash–Based Geopolymer Concrete for Sustainable Construction

Author(s):Anil Dhiman¹, Sneha Chandel², Kabir Gill³

Affiliation: 1,2,3Department of Civil Engineering, Marudhar Engineering College, Bikaner, Rajasthan, India

Page No: 16-20

Volume issue & Publishing Year: Volume 2 Issue 10 , Oct-2025

Journal: International Journal of Advanced Engineering Application (IJAEA)

ISSN NO: 3048-6807

DOI: https://zenodo.org/records/17627715

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Abstract:
Geopolymer concrete has emerged as a promising sustainable alternative to ordinary Portland cement (OPC) concrete due to its low carbon footprint, superior durability, and effective utilization of industrial by-products. This study evaluates the mechanical and durability performance of fly ash–based geopolymer concrete (GPC) produced using low-calcium Class F fly ash activated with alkaline solutions of sodium hydroxide (NaOH) and sodium silicate (Na₂SiO₃). Mixes with varying molarity of NaOH (8M, 10M, and 12M) were prepared and cured under ambient conditions to assess compressive strength, split tensile strength, and flexural strength. Durability characteristics were examined through water absorption, acid resistance, and exposure to sulfate solutions. The results showed a significant increase in compressive strength with higher activator concentration, with the 12M mix achieving strengths comparable to or exceeding OPC concrete. Durability tests indicated that GPC exhibited lower mass loss and reduced permeability due to its dense microstructure. The findings confirm that fly ash–based geopolymer concrete is a viable eco-friendly construction material with excellent mechanical and chemical resistance properties, making it suitable for sustainable infrastructure applications.

Keywords: Geopolymer Concrete; Fly Ash; Alkali Activation; Sustainable Construction; Compressive Strength; Durability Properties

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