DURABILITY OF SULFATE RESISTING SLAG BLENDED CEMENTS AND MORTARS IN SEA-WATER

The hydration characteristics as well as the sea water attack of sulph ate-resisting slag content up to one year have been studied. The resul ts show that with the increase in slag content the rate of hydration o f cement pastes in water decreases. The compressive strength of the ce ment mortars immersed in sea water increases up to 6 months then decre ases, The free lime content decreases with time due to the reaction of chloride ions with Ca(OH)(2). The Cl- and SO3 contents increase with time of immersion in sea water.