Paper Title
An Experimental Study on Possibility of Adding Sea Water on Concrete by Partial Replacement of Cement With Glass Powder & GGBS

Abstract
In the near future, portable water will be in scarce even for day today activities. It is said that in 2025 half of the mankind will live in the areas where fresh water is not enough. Also, UN and WMO are predicting 5 billion people will be in short of even drinking water. Concrete exposed to sea water is subjected to be in contact with solution of salts principally sodium chloride and magnesium sulphate. Thus, concrete exposed to sea water should be made with cement of controlled aluminates content and with nonreactive aggregates; embedded steel should be well covered by concrete of low permeability; and good construction practices should be followed. At the same time the global cement industry contributes about 7% of greenhouse gas emission to the earth’s atmosphere. In order to address environmental effects associated with cement manufacturing, there is a need to develop alternative binders to make concrete. It is found that Glass powder and GGBS can be used as cement replacement material up to particle size less than 75µm to prevent alkali silica reaction (1). An experimental investigation has been carried out to determine the strength and durability properties of concrete with the influence of Glass powder and GGBS. In order to replace cement by Glass powder and GGBS, the particle size of Glass powder and GGBS is restricted to that of cement. Concrete specimens were casted by replacing cement with 10, 20 and 30% of Glass powder and 30% of GGBS and sea water is used to bind the materials instead of portable water and curing carried up to 180 days in sea water and were compared with conventional concrete. Keywords - Sea water, glass powder, GPBS, durability, alkalinity.