Concrete is one of the major construction material used in the construction now a day. It is a composite material
containing cement, coarse aggregate, fine aggregate and water. In the future, fresh water will be very difficult to get and obtain.
It is said that in 2024 half of the mankind will live in the areas where fresh water is not enough. Also, UN and WMO are
predicting 5 billion people will be in short of even drinking water. The depletion of natural sand deposits and illegal sand mining
is a common issue on these days. Extraction of river sand as fine aggregate affect negatively on river ecosystems, navigation and
flood control. This paper presents an experimental critical review of existing studies based on the effects of using sea-sand
and/or seawater as raw materials of concrete on the properties of the resulting concrete, short and long term strength as well as
durability. It has been shown by some researchers that concrete made with sea water and sea sand develops its early strength
faster than th
