GEOPOLYMER CONCRETE: A CONCRETE OF NEXT DECADE

Abstract

This paper presents the progress of the research on making Geopolymer Concrete using fly ash. This aims at
studying the different properties of Geopolymer Concrete using fly ash and the other ingredients locally available. Potassium
Hydroxide and sodium Hydroxide solution can be used as alkali activators in different mix proportions. The actual
compressive strength of the concrete depends on various parameters such as the ratio of the activator solution to fly ash,
morality of the alkaline solution, ratio of the activator chemicals, curing temperature etc. In recent years, Concrete usage
around the world is second only to water. Ordinary Portland cement (OPC) is conventionally used as the primary binder to
produce concrete. The amount of the carbon dioxide released during the manufacture of OPC due to the calcinations of
limestone and combustion of fossil fuel is in the order of one tonne for every tonne of OPC produced. In addition, the extent
of energy required to produce OPC is only next to steel and aluminum. Attempts to reduce the use of Portland cement in
concrete are receiving much attention due to environment-related. Fly ash-based Geopolymer Concrete is a ‘new’ material
that does not need the presence of Portland cement as a binder.