Performance Study of High-Strength Concrete with Fly Ash Waste Substitution as Admixture

Juhandri Juhandri; Ravi Kumar Vinay; Youssef H. M. Amran

doi:10.70716/reswara.v4i1.365

Authors

Juhandri Department of Civil Engineering, Universitas Negeri Jakarta, Jakarta, Indonesia Author
Ravi Kumar Vinay Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, India Author
Youssef H. M. Amran Department of Civil Engineering, King Saud University, Riyadh, Saudi Arabia Author

DOI:

https://doi.org/10.70716/reswara.v4i1.365

Keywords:

high-strength concrete, fly ash waste, compressive strength, sustainable construction, supplementary cementitious material

Abstract

High-strength concrete plays a crucial role in modern infrastructure development due to its superior mechanical performance and durability. However, its high cement consumption raises environmental concerns related to carbon emissions and resource depletion. This study investigates the performance of high-strength concrete incorporating fly ash waste as a partial cementitious admixture to enhance sustainability while maintaining structural performance. The research employed an experimental approach by preparing concrete mixtures with varying fly ash substitution ratios and evaluating compressive strength, durability indicators, and microstructural behavior. Laboratory tests were conducted following standardized procedures, and results were analyzed using comparative and descriptive statistical methods. The findings indicate that optimal fly ash substitution significantly improves long-term compressive strength and durability due to enhanced pozzolanic reactions and refined pore structures. The performance trends observed in this study align with previous findings on high-volume fly ash concrete reported in international literature. The results confirm that fly ash waste can effectively function as a supplementary cementitious material in high-strength concrete, contributing to reduced cement usage and improved environmental performance. This study provides empirical evidence supporting the adoption of fly ash-based concrete for sustainable construction practices and offers practical insights for future high-performance concrete design.

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