Rheological, fresh, and mechanical properties of mechanochemically activated geopolymer grout: A comparative study with conventionally activated geopolymer grout

• A comparison of mechanochemically activated and conventionally geopolymer grouts. The influence slag/fly ash ratio sodium hydroxide molarity in grouts behavior. Mechanochemical activation processes effect on rheological fresh characteristics. Effect mechanochemical mechanism mechanical properties grout. In this research, a (MG) grout is adopted to activate slag, fly ash, hydroxide, silicate by dry grinding ball mill for 2 h, after which water the only additive required initiate geopolymerization reaction. (CG) was also evaluated purposes. Twenty-four different slag mixtures have been prepared at ratios (0S100F, 50S50F, 75S25F, 100S0F) three molarities (1.25, 2.5, 3.75) assess behavior both MG CG series tests were examined, such as characteristics, setting time, bleeding, unconfined compressive strength (UCS), ultrasonic pulse velocity (UPV), scanning electron microscopy (SEM). experimental results showed that technique reduced characteristics (setting time bleeding) compared conventional process. Considering properties, UCS UPV higher than Furthermore, content concentration significantly affected rheological, fresh, all regardless method. Both increased considerably with increase molar content. Whereas bleeding capacity dramatically