Influence of Initial Unconfined Compressive Strength of Flyash Geopolymer Sand Mix (Artificial Mix) on the Ultimate Strength of Concrete

Abstract

This study explores the relationship between the unconfined compressive strength of fly ash geopolymer sand and the ultimate strength of concrete. Fly ash, a by-product of coal combustion, is increasingly valued for its ability to enhance concrete as a supplementary cementitious material. The primary objective is to assess how variations in initial compressive strength of concrete mixtures with fly ash impact their ultimate strength. The experimental approach involves preparing concrete mixes with different fly ash proportions as partial cement replacements. Initial compressive strength tests evaluate early-stage strength characteristics, followed by a thorough curing regime to simulate real-world conditions for long-term strength development. The study aims to uncover the relationships between initial and ultimate compressive strengths. Factors such as curing duration, water-cementitious materials ratio, and fly ash content are systematically varied to understand their individual and combined effects on concrete performance. Advanced imaging techniques analyze the concrete's microstructure, providing insights into the mechanisms driving strength development. The findings offer valuable insights for optimizing concrete mix designs with fly ash, aiming to achieve desired ultimate strength levels. Understanding the interplay between initial and ultimate strength is crucial for ensuring the durability and structural integrity of concrete structures, promoting sustainable construction practices through effective fly ash utilization. Ultimately, this research contributes to the advancement of eco-friendly, high-performance concrete formulations, supporting sustainable construction practices.