Experimental investigations on fresh and mechanical properties of fly ash and ground granulated blast furnace slag self-compacting geopolymer concrete

Concrete is typical utilized material that requires a lot of cement and energy to produce and emit carbon dioxide (CO2), need to find an alternative. Self-Compacting Geopolymer Concrete (SCGC) is a sustainable engineering method in industrial ecosystems which do not need shaking and cement. In this study, the effects of fly ash (FA) andGround Granulated Blast Furnace Slag (GGBS) based SCGCwith sodium silicate and sodium hydroxide solutions as activatorson fresh and mechanical properties was investigated. The constant binder concentration of 0.45 and binder weight of 450 kg/m3 are used. GGBS replacement with FA was 0 %, 25 %, 50 %, 75 %, and 100 % weight percentage in each SCGC. The fresh properties were investigated by using tests such as slump flow, T50cm, V-funnel, and L-box. The mechanical properties of SCGC were evaluated by compressive, split tensile, and flexural tests at 7 and 28 days. The GGBS and FA dosage is optimized, and results show that 50 % treatment of the GGBS and FA has enhanced hardening qualities in SCGC 3 mix. Superplasticizers (2 %) was used to maintain fluidity of the SCGC. This study shows the designed SCGC is cost-effective building material for precast and cast in situ constructions under ambient conditions.