Performance of Fly Ash and Ggbs Based Geopolymer Concrete Using Single Alkaline Activator Solution and Its Cost Analysis

Abstract

Concrete is the most durable, versatile and reliable building material in the world. Next to water, concrete is the most used material. Ordinary Portland cement production accounts for 5-7% of total greenhous e gas emissions. It also consumes a lot of energy. Today, Geo-polymer concrete (GPC) has become a more sustainable concrete compared to conventional concrete. This research work focuses on the performance of Fly Ash and GGBS based geo-polymer concrete cured in outdoor conditions using a single alkaline activator solution (Geo activator). The variations of Fly Ash and GGBS were (FA100-GGBS0; FA90- GGBS10; FA70-GGBS30; FA50-GGBS50). In this study, only the Geo activator is used to activate Fly Ash and GGBS in the mixtures. Geo polymer concrete of size 100 mm x 100 mm x 100 mm was used in this research work to measure compressive strength at different ages of 7 days and 28 days. The results reveal that the increase in the proportion of GGBS content in the mix increases compression strength of concrete. The cost analysis was also carried for geopolymer concrete, compared with conventional concrete and the results reveals that for the lower grades, the cost will be the same as for conventional concrete and for the higher grades, the use of geo polymer concrete can reduce the cost of construction up to some extent.