Farklı Aktivatör Ve Ham Madde Değişkenlerinin Geopolimer Hamurun Basınç Dayanımına Etkisinin İncelenmesi

Abstract

In this study, the effects of the raw material and alkali activator properties on the compressive strength properties of geopolymer pastes were investigated. Class F fly ash (FA) and blast furnace slag (S) were used as raw materials in geopolymer paste samples. The raw materials (100U, 80U-20Y, 60U-40Y, 40U-60Y, 20U-80Y, 100Y) were activated using Na2SiO3 and NaOH (8, 10, 12 and 14 M). All samples were cured under laboratory conditions until the test day. The compressive strength values of geopolymer paste samples on the 7 and 28th days were examined. The results showed that with the change of raw material and alkali activator properties, the compressive strength values changed significantly. With the increase in the substitution rate of S, significant increases were observed in the compressive strength values. In addition, it was observed that geopolymer samples produced using class F FA need high temperature curing to have superior strength properties. Regardless of the type of raw material used, all samples activated with Na2SiO3 gained more than 85% of their 28-day ultimate strength in the first 7 days. On the other hand, it was determined that the optimum NaOH concentration that should be used to obtain the maximum compressive strength varies depending on the binder charecteristics.