A Comparative Analysis of the Performance and Characteristics of Single-Part and Two-Part Geopolymer Concrete

Abstract

Cement continues to be the predominant binding material in civil engineering applications; however, its production is associated with significant environmental concerns, particularly its high carbon footprint. The cement industry alone is responsible for nearly 8% of global CO₂ emissions. To address this challenge, the present study explores the complete replacement of cement with ground granulated blast furnace slag (GGBS) activated using high-alkaline solutions such as alkali hydroxides and alkali silicates. In this investigation, GGBS was combined with Fosroc Conplast SP430 DIS as a chemical admixture. The study examines the performance of geopolymer concrete prepared in both one-part and two-part systems, highlighting their respective advantages and limitations. The experimental program was designed for M40-grade concrete, with specimens cured under ambient conditions for 7, 28, 56, and 84 days. Mechanical properties were evaluated through compressive and flexural strength tests to assess the overall behavior of the developed mixes.