Akademik Veri Yönetim Sistemi
2nd International Conference on Engineering, Natural Sciences, and Technological Developments (ICENSTED 2025), Bayburt, Türkiye, 20 - 23 Haziran 2025, cilt.1, ss.115-121, (Tam Metin Bildiri)
warming. In this context, it is known that cement production contributes approximately 7% to global CO2 emissions. Increased construction activity is driving up cement consumption, highlighting the need for sustainable, environmentally friendly alternative binding materials. Geopolymers are binding materials obtained by chemically activating waste materials containing silicate and aluminate with suitable alkali activators and can be considered as an alternative to Portland cement (PC). Studies in the literature show that geopolymers provide high strength, durability, and acid resistance under suitable conditions. In this study, geopolymer-based grout mixtures were prepared using waste materials such as fly ash (FA) and silica fume (SF) and evaluated as an alternative to cement. In the study, geopolymer grout mixtures containing cement, FA, SF, and alkali activator solution (NaOH and Na2SiO3) (AAS) at different water/binder ratios (w/b = 0.85, 1.05, and 1.25) were prepared, and their flowability performance was determined using the Marsh funnel test. The experiments were conducted in accordance with the American Society for Testing and Materials (ASTM) D6910/D6910M-19 standard. The results showed that increasing the w/b ratio reduced the viscosity of the grout mixtures and decreased the flow time. Additionally, it was determined that FA and SF additives positively affect fluidity. The flow times of mixtures containing AAS were found to be lower than those of mixtures containing only cement. The addition of AAS enhances the effectiveness of geopolymerization, enabling the grouts to acquire suitable fluidity properties for injection.