An Experimental Investigation Report of Chloride and Sulphate effects on geo polymer mortar

Abstract

This paper presents the progress of the research on making Geo polymer mortar using the Thermal Power Plant fly ash. The project aims at making and studying the different properties of Geo polymer mortar using this fly ash and the other ingredients locally available. Sodium met silicate and sodium Hydroxide solution were used as alkali activators in different mix proportions. The actual compressive strength of the mortar 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, Mortar usage around the world is second only to water. Ordinary Portland cement (OPC) is conventionally used as the primary binder to produce mortar. 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 ton for every ton of OPC produced. In addition, the extent of energy required to produce OPC is only next to steel and aluminium. Attempts to reduce the use of Portland cement in mortar are receiving much attention due to environment-related. Fly ash-based Geo polymer concrete is a ‘new’ material that does not need the presence of Portland cement as a binder. The role of Portland cement is replaced by low calcium fly ash. Geo polymer is an inorganic alumina-Hydroxide polymer synthesized from predominantly silicon (Si) and aluminium (Al) materials of geological origin or by-product materials such as fly ash. The term Geo polymer was introduced to represent the mineral polymers resulting from geochemistry..