Bekem Kara, İlknur2020-01-032020-01-032019Kara, İ. B. (2019). The effect of nano silica on the properties of cement mortars containing micro sılıca at elevated temperatures. Romanian Journal of Materials. 49(4), 518-526.https://hdl.handle.net/11494/1905This study investigates the effects of nano silica admixture on the behavior of cement mortars containing micro silica exposed to elevated temperatures. The cement mortars were incorporated with an optimized ratio of 5?wt% micro silica and 0,1,2,3wt % of nano silica admixtures. The specimens were exposed to elevated temperatures of 300 and 600 °C. After cooling, the mass loss, ultrasonic pulse velocity and compressive strengths of the specimens were determined. The investigations undertaken in this study were supported by scanning electron microscopic images. As a result, there is an optimum nano silica content which can be beneficial for improving the thermal resistance of cement mortars. Nano silica (2 wt%) improved the resistance of cement mortars containing 5 wt% micro silica at elevated temperatures.eninfo:eu-repo/semantics/openAccessCement mortarNano silicaMicro silicaElevated temperatureArticle494518526N/AN/A