Experimental study on Flyash and Ground Granulated Blast Furnace Slag on the Strength of Geopolymer concrete

Abstract

Concrete is one of the most used construction materials nowadays. Portland cement makes up the
majority of concrete. The main material that doesn't use Portland cement or emit greenhouse gases is geopolymer.
Davidovits (1978) suggested the geopolymer approach as a potential replacement for Portland cement in concrete.
In order to make binders, he suggested polymerising alkaline liquids with silicon and aluminium obtained from
geological sources or byproducts like fly ash, slag, and rice husk ash. He called these binders "geopolymers". The
most likely sources of geopolymers are fly ash and slag. The mechanical, long-term, and microstructural
characteristics of geopolymer concrete made from fly ash and powdered granulated blast furnace slag are
investigated in this study. This study examines the effects of different ratios of ground granulated blast furnace
slag (GGBS) and class F fly ash (FA) on the durability and mechanical properties of geopolymer concrete (GPC).
Alkaline activators include NaOH and Na₂SiO₃. The bond, compressive, split tensile, and flexural strengths were
examined in this study. We also examined tests for sulphate attack, rapid chloride permeability, and water
absorption using geopolymer concrete composed of ground granulated blast furnace slag and low-calcium fly ash.
These values were measured at room temperature after 7, 28, 56, and 90 days of cure. A previous work (Hardjito
and Rangan, 2005) provided the GPC mix proportions used in this experiment. The short-term mechanical, longterm
durability, and microstructural properties of GPC mixes made of FA and GGBS were investigated in this
work. The short-term mechanical durability and micro-level variations between GPC and M45-grade regular
concrete were also examined in this study. Fibre-reinforced geopolymer concrete has been studied by researchers.
The strength and durability of various geopolymer concrete mixtures have been evaluated