Characteristic properties of fly ash-based self-compacting geopolymer mortars with synthetic wollastonite microfiber produced from silica and calcite

This study investigated the fresh, physical, and mechanical properties of self-compacting geopolymer mortars (SCGs) with synthetic wollastonite microfiber (SWM). SCGs were designed Class F fly ash (FA) as a binder by activating it Na2SiO3 NaOH solutions. First, SWM was produced in laboratory. Alkali ratios determined 1.5, 2.0, 2.5, whereas percentages utilized 0%, 4%, 8%, 12% weight binder. After cured at 80 oC 100 for 24 hours, respectively, they kept room temperature until testing age. The compressive strength, flexural ultrasonic pulse velocity, dynamic modulus elasticity, water sorptivity coefficient values, physical characteristics tested end 28th day. highest strength value obtained 28.9 MPa SCG-1.5-8 oC, while 6.5 measured SCG-2-12 oC.