This document summarizes a study on replacing fresh water with salt water for making concrete. The researchers investigated the effects on mechanical properties of concrete like compressive strength, split tensile strength, and flexural strength. Concrete cubes, cylinders, and beams were made and cured using both fresh water and salt water. Testing at 7, 14, and 28 days found that concrete cured with salt water exhibited marginally higher strengths compared to fresh water concrete across all properties and ages tested. The study concluded that salt water can be used for casting and curing concrete without reducing its strength properties.