Özet:

This research illustrates results of an experimental study carried out to determine the engineering properties of geopolymer mortar reinforced with two types of fibers. The base material and the activation agents are fly ash and mixture of NaOH and Na2SiO3. The aggregate used is river sand with a nominal particle size of less than 4 mm. Two different types of fiber were used which are basalt fiber and steel fiber. The effect of utilization of fiber on unit weight, flow of mortar, flexural and compressive strength of geopolymer mortar was studied. Fly ash to alkaline activator was fixed at 2/1. The alkaline mixing ratios were 1 to 2.5 were taken into account for NaOH solution and Na2SiO3 solution, respectively. Two types of fibers basalt fiber and steel fiber were added to the mixes with ratio of 0.20%, 0.40%, 0.60%, 0.80%, and 1.0% by volume of the mortar, with a control mix having no fiber. Heat curing regime of 24 hours with 60 oC temperature was applied. According to the experimental results, it was determined that the inclusion of fibers decreases the flow but increases the flexural and compressive strength of geopolymer mortar.

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