Durability studies on the high calcium flyash based GPC
Geopolymer concrete is an environment friendly green concrete which is comparatively of lower carbon footprint. Most of the studies reported is about the development of low calcium flyash based GPC only and and that too mostly on achieving the compressive strength and not much on its durability related properties. In this study, the novel idea of using high calcium flyash based GPC is considered with Sodium based alkaline solution having different concentrations and cured in hot oven at 60oC for 24 hours. Three different grades namely GM20, GM30 and GM40 are designed and common durability related properties like water absorption, acid resitance and corrosion resistance by constant voltage polarization test are determined using relevant concrete specimens and compared with similar grades of conventional concrete. High calcium flyash based GPC is observed to possess superior durability related properties over OPCC.
Keywords: Geopolymer concrete, high calcium flyash, durability, corrosion resistance, polarisation test