DOI: 10.5176/2301-394X_ACE13.154
Authors: Meena Murmu, Suresh Prasad Singh
Abstract:
This paper outlines the influence of mineral admixtures on strength properties and hydration products of alkali activated slag cement. The slag cement was prepared by activating the ground granulated blast furnace slag of Rourkela Steel Plant with alkali activator lime and sulfate activator plaster of Paris. The effect of admixtures on compressive strength was studied by adding admixtures like silica fume, fly ash, glass powder and ordinary Portland cement in different proportions. For the present test variables, silica fume is found to be a better admixture compared to fly ash, glass powder and OPC. The 28 days compressive strength of the mortar with 15{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} silica fume is found to be 47.98MPa. Further the strength of mortar cubes was correlated with the developed microstructure using XRD, SEM and FTIR test results. Studies on microstructure and XRD reveal that the hydration peaks are mainly C-S-H and ettringite, which mainly enhances the strength.
Keywords: Ground granulated blast furnace slag; alkali activation; mineral admixture; silica fume; glass powder
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