EPS İle İkame Edilmiş Uçucu Küllü Geopolimer Hafif Harcın Fiziksel, Mekanik ve Isıl Geçirimlilik Özelliklerinin İncelenmesi

In this study, fly ash-based geopolymer light mortars were produced using expanded polystyrene (EPS). EPS aggregated geopolymer mortars were produced by replacing the river sand with 20%, 40%, 60%, 80%, 100% by volume. Geopolymer mortars with EPS were subjected to a temperature heat curing at 75 ° C for 24 and 48 hours by activating the F class fly ash with NaOH at a fixed rate. Physical properties, mechanical properties, and thermal conductivity properties of geopolymer lightweight mortar samples after heat curing were investigated. In addition, the flexural, compressive strength of geopolymer mortars after high temperatures at 300 ° C, 600 ° C, 900 ° C, and the microstructure of geopolymer pastes were investigated. According to the results, the unit weights of light geopolymer mortars subjected to 24 hours of heat curing are between 1.93 and 0.61 g/cm3, and the unit weights of light geopolymer mortars subjected to 48 hours of heat curing are between 1.87 and 0.66 g/cm3 has been seen. The compressive strength loss of geopolymer mortars with 20% and 40% EPS replacement (EUK 20, EUK40) after the high temperature was determined to be less than the reference geopolymer sample. The porous structure that causes loss of strength after high temperature and NASH gel structure that maintains the existing strength are displayed in FESEM images. Highly linear between unit weight and compressive strength (R2 = 0.9191), heat transmission coefficient (R2 = 0.9787), ultrasonic transmission velocity (R2 = 0.9082), and split tensile strength (R2 = 0.9191) It has been concluded that there is a relationship.