Abstract:

In this study, the strength of geopolymer mortars produced with alkali-activated trachytic tuff (TT) with nano silica (NS) added was investigated by curing in different environments. Calcium hydroxide Ca(OH)2 and sodium carbonate (Na2CO3 ) combined alkali activator, which is not widely used, was used to activate the mortars. Geopolymers can be obtained from alumino silicate and industrial waste based materials to contribute to environmentally friendly production. The trachytic tuff used in the study is a material of volcanic origin containing abundant alumino silicate and has a lower alkaline-activated property compared to industrial wastes. For this reason, geopolymer mortars were synthesized in a 96-hour curing environment at 80°C by examining the detailed literature. Sulfate and acid attacks are the most important chemical problems affecting the service life of building materials. In this context, the samples with 1.0% nano silica additive, which showed the best performance in geopolymer mortars, whose mechanical behavior was examined in 5% sodium sulphate (Na2SO4), magnesium sulphate (MgSO4), and hydrochloric acid (HCl) solutions along with pH changes for 360 days; pH values are in the range of 13.2-11.8, 11.6-8.5, 3.5-2.6; bending strength of 12.25, 11.50, 7.41 MPa; compressive strength of 66.12, 50.63, 40.82 MPa; was found to be.

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