Technical Session 3:

Title:         Effect of Alkali Activators on Compressive Strength of Geopolymer Mortars with GGBS and Metakaolin
Authors:    B. Sarath Chandra Kumar, K. Ramesh
Abstract:   Energy saving in building technology is among the most critical problems in the world. Thus, it is a need to develop sustainable alternatives to conventional concrete utilizing more environmental friendly materials. One of the possibilities to work out is the massive usage of industrial wastes like flyash, ground granulated blast furnace slag (GGBS), rice husk ash, metakaolin etc… to turn them to useful environmental friendly and technologically advantageous cementitious materials. In this study, ground granulated blast furnace slag (GGBS) and metakaolin is used to produce of mortar with the effect of alkaline activator concentration. Mortar is prepared by using alkaline solution of sodium silicate mixed with sodium hydroxide. The fixed ratio of sodium silicate to sodium hydroxide is 2.5 and the concentration of sodium hydroxide is 8M to10M. It is found that as the molarity increases the compressive strength of cubes increases. Concentration of 10M NaOH promotes the best properties of mortar by achieving the greatest compressive strength. The used of alkaline activation system is the best method to prepare industrial byproduct concrete. Moreover, alkali activated product itself gains superior properties which lead to the system become the most interesting method to produce sustainable concrete. This paper presents the results based on experimental study of molarity on compressive strength of geopolymer mortar.

Keywords:  Compressive Strength, Geopolymer Mortar, Sodium Silicate, Sodium Hydroxide, Molarity.
Pages:        062-064

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