Çelikten, SerhatSarıdemir, MustafaDeneme, İbrahim Özgür13.07.20192019-07-1613.07.20192019-07-1620190950-0618https://dx.doi.org/10.1016/j.conbuildmat.2019.05.055https://hdl.handle.net/20.500.12451/3025In this study, changes in the mechanical and microstructural properties of alkali-activated blast furnace slag (BFS) and BFS + fly ash (FA) blended mortars exposed to 25, 400, 600 and 800 °C temperatures are investigated. The alkali-activated mortars using the replacement ratios of 0, 25 and 50% FA by weight of BFS together with the activators are produced in addition to the control mortars produced by only cement. Three different optimum Ms (SiO 2 /Na 2 O ratio of activators) values of 0.50, 0.75 and 1.00 are determined for the alkali-activated mortars. The FA substitution by BFS increases the high temperature resistance of alkali-activated BFS mortars. © 2019 Elsevier Ltdeninfo:eu-repo/semantics/closedAccessAlkali-activated MortarBlast Furnace SlagFly AshHigh TemperatureMechanical PropertiesMicrostructureArticle217506110.1016/j.conbuildmat.2019.05.055Q1N/A