2019 CSCE Annual Conference - Laval (Greater Montreal) Conference
Dr. Ahmed Soliman, Concordia University
Mr. Sameh Hassan, Concordia University
Alkali activated systems are considered the third generation of binding systems. Alkali Activated systems are characterized by low carbon dioxide emission and superior mechanical and durability performance compared to cement-based systems. This study will focus on characterizing the performance of alkali activated slag (AAS) mortar under impact loads. Sodium hydroxide and sodium silicate were combined to form the activator for all tested mixtures. Effects of activator dosage and properties including sodium oxide (Na2O%) and silicate modulus (Ms) on strength and Impact resistance of AAS mortar were evaluated. Results showed that impact resistance was enhanced as the Na2O% increased up to 8 % which is similar to the improvement in compressive strength. Moreover, at the same Na2O%, increasing Ms up to 2 was found to improve the impact resistance. There was a relationship strength and impact resistance improvements.
Keywords: alkali activated slag, mechanical properties, impact.