The overall demand of concrete per year is 11.5 billion tons. This means that, in addition to 1.5 billion tonnes of cement, the concrete industry is consuming annually 9 billion tonnes of sand and rock together with one billion tonne of mixing water. One of the major challenges, with the environmental awareness is exhaustion of river sand resources due to massive consumption. If adequate and reliable sand resources cannot soon be found economic development is bound to be affected. Inconvenient transportation raises the cost of river sand resources. In the present work, literature on the use of sea sand as replacement of fine aggregate has been studied. Various mechanical properties such as compressive strength and split tensile strength are determined at 7, 14 and 28 days along with durability tests at 28 days. Comparative strength development of sea sand mixes in relation to the control mix i.e. mix without sea sand was evaluated.