MECHANICAL PROPERTIES OF SYNTHESIZED SLAG BASED GEOPOLYMER CONCRETE

Abstract

Mechanical properties of slag based geopolymer concrete has been studied with partial replacement of ground granulated blast furnace slag with silica fume, fly ash, and metakaolin. Compressive strength was studied at the ages of 7,28, and 90 days while splitting, flexural, and bond strength between reinforcement bars and concrete were studied at the age of 28 days. Different replacement percentages of silica fume, fly ash and metakaolin were used instead of slag for 15 concrete mixes with addition to two more concrete mixes with cement and the other is a mixture of cement and slag for comparing purposes. Results revealed that using ground granulated blast furnace slag as a base material gave the highest compressive and indirect tension strength at all ages. However, partial slag replacement with fly ash and metakaolin showed more bond and flexural strengths compared to mixes with no replacement percentages