Compressive Strength of Concrete in Normal Water and Seawater using Fly Ash
At present, the construction of concrete in marine areas has been facing durability issues. This research uses fly ash to determine the effect of seawater curing on strength and durability of different concrete structures. The chemical reaction of chlorides, sulphates and alkalies like sodium and potassium and in some cases dissolved carbon dioxide affect the strength of concrete as well as durability vigorously. Normal and sea water are used as mixing water in making the test specimens. Different ingredients have been selected to determine the compressive strength i.e. 30% fly ash with 70% of cement concrete; 70% fly ash with 30% of cement concrete and only cement concrete. Finally, three specimens are cured in normal tap water and seawater for 7, 14 and 28 days and the compressive strength is tested. The result indicates that the compressive strength of concrete is higher in normal water and lower in the seawater in different days of curing.
Compressive strength, Normal water, Sea water, Fly ash, Green concrete, Acid attack.