A Review Study on the Effect of Fresh & Sea Water on Recycled Coarse Aggregate Cement Concrete

The use of construction and demolition waste in concrete mixtures cured with the sea water leads to the production of a very sustainable concrete. The potential risk of steel reinforcement corrosion (due to chloride in the seawater) in such mixtures may be eliminated when considering plain concrete or noncorrosive reinforcement (e.g., fibre-reinforced polymer). This study enhance the performance of the fresh and hardened properties of a proposed green concrete mixed using construction and demolition waste as a recycled aggregate curing with fresh and sea water. Fresh and hardened properties of the concretes, including workability, strength gain, drying shrinkage, permeability, and microstructure, were characterized and studied. The study reveals that the use of seawater and RCA together has substantial effects on concrete performance. These strategies, however, somewhat reduce the green aspect of the proposed seawater-mixed concrete with RCA.