Sara Huerta, “Incorporation of Off-Spec Fly Ash in Cementitious Systems: Characterization and Performance Boost”
Mentor: Konstantin Sobolev, Civil & Environmental Engineering
Poster #63
Due to a shortage of conventional supplementary cementitious materials, off-spec fly ash, a by-product of coal combustion in power plants, has a potential application to enhance concrete performance. This study investigated the use of off-spec fly ash in cement-based materials, focusing on its characterization and impact on mechanical performance. The reported research evaluated various types of fly ash and beneficiation techniques to identify differences in chemical composition, particle size distribution, and physical properties, aiming to improve their suitability for concrete applications. Evaluating existing and emerging methods for incorporating off-spec fly ash in cementitious mixtures is conducted to explore innovative approaches for effective utilization. Mechanical properties of cement-based materials with finely milled fly ash were compared to traditional formulations to understand the performance enhancement potential. The study addresses the need for sustainable utilization of off-spec by-products, aiming to optimize their incorporation in cementitious systems to enhance mechanical and, potentially, durability performance. This research contributes to advancing the understanding of off-spec fly ash utilization in concrete production, offering insights into its potential benefits and challenges in sustainable construction practices.