ABSTRACT
The present investigation was taken up to conduct investigations on the compressive strength, internal structure and chemical composition of the concrete casted and cured with marine water in comparison with those casted and cured with potable water. Three combinations viz. FF (cubes cast and cured with potable water), SF (cubes casted in salt water and cured in potable water) and SS (cubes casted and cured in salt water) were taken for analysis. The compressive strength was tested at the end of 7, 28 and 90 days of curing. The fresh concrete tests were conducted a slump of 14.5cm, compaction factor of 0.8% was obtained for concrete casted using marine water. M30 concrete was prepared and the internal composition and morphology was studied using SEM (Scanning Electron Microscope) and EDX (Energy Dispersive X-ray Analysis). From the test sequence the strength of concrete cubes casted and cured with potable water at 7, 28 and 90 days were found to be 33.55 N/mm2, 43.33 N/mm2 and 56.66 N/mm2 respectively. The compressive strength of concrete cubes casted and cured by marine water at 7, 28 and 90 days were found to be 36.66 N/mm2, 44.07 N/mm2 and 39.21 N/mm2 respectively. The strength of concrete cubes casted in salt water and cured in fresh water at 7, 28 and 90 days were found to be 37.33N/mm2, 42.36N/mm2 and 46.84 N/mm2 respectively. From the morphological aspect there was no evident change observed for the various combinations.
