Reactivity Assessment of Modified Ferro Silicate Slag by R3 Method

Traditional methods to track the reactivity of supplementary cementitious materials (SCMs) and their contribution hydration mechanism mostly use Portland Cement (PC) as an activator. Alternatively, a novel method assess SCMs called R3 was recently presented. This uses lab grade chemicals such portlandite (CH), K2SO4, KOH, CaCO3 activate SCM by resembling pH alkaline pore solution created PC. By using this method, can be easily quantified from measured heat release, bound water content, CH consumption. The primary objective current study is apply methodology analyze Modified Ferro Silicate (MFS) Cu slag benchmarked against siliceous fly ash (FA), ground granulated blast-furnace (GGBFS), inert quartz filler. GGBFS showed highest cumulative release content due its latent hydraulic behavior. Determination with XRD analysis major phase model MFS paste participation Fe in forming Fe-AFm. presence hydrotalcite/Al-AFm, whereas FA ettringite (AFt) crystalline reaction products. experiments also indicate that acts reactive pozzolanic material acceptable performance consumption, used make concrete. With possibility replace part PC, sustainability circular economy fairly well achieved.