Influence of Activator Solution and Binder Composition on the Characteristics of Self-Compacting Geopolymer Concrete

Abstract

Self-compacting geopolymer concrete (SCGPC) being an innovative material synergizes the added advantage of self-compacting concrete and geopolymer concrete. While the field of self-compacting geopolymer is still evolving and the study explores the effect of standard consistency, setting time, rheological characteristics, and compressive strength. This research study involves two grades of single activator solutions (Ms 1.99 and Ms 2.92) and diverse binders, viz: fly ash, rice husk ash (RHA), and ground granulated blast furnace (GGBFS). This study examined the performance characteristics of SCGPC, particularly focusing on ternary blended binders with single activator alkaline solutions. The research study delves into both fresh and hardened states to assess flowability, passing ability, segregation resistance and compressive strength. The fresh properties of SCGPC are evaluated adhering to EFNARC guidelines for tests J-Ring, V-Funnel, V-T5minutes, slump flow, and T50cm to evaluate fresh properties of SCGPC. Compressive strength characteristics of SCGPC at the hardened state are scrutinized at 3, 7 and 28 days using single activator solutions (Ms 1.99 and Ms 2.92). The findings portrayed that replacement of GGBFS with RHA has noticeable effects on workability properties, and an optimum RHA replacement level of 5% is identified, considering the suitable physical and mechanical characteristics of SCGPC. This research study emphasizes the complex interplay between binders, activator solutions and the resulting properties of SCGPC. This extensive research on SCGPC makes a significant contribution by elucidating the performance of this novel concrete under varied conditions.