EFFECT OF ALKALI MATERIALS ON GEO POLYMER CONCRETE

The use of Portland cement in concrete construction is under critical review due to high amount of carbon dioxide gas released to the atmosphere during the production of cement. In recent years, attempts to increase the utilization of fly ash to partially replace the use of Portland cement in concrete are gathering momentum. Most of this by-product material is currently dumped in landfills, creating a threat to the environment. Geopolymer concrete is a ‘new’ material that does not need the presence of Portland cement as a binder. Instead, t he source of materials such as fly ash, that are rich in Silicon (Si) and Aluminium (Al), are activated b y alkaline liquids to produce the binder. Hence concrete with no Portland cement.