going CO concrete having plastic consistency of fresh state to be produced for use in the construction of a maine structure Analysis of the sea water showed that so content is 2000 mg/et. Concrete is going to be produced with the below materials. Portlant cement standard mortar strength is 43 MPa, specific gravity is 3.10 kg/dm is Aggregates 0,25 Natural Sand Gravel Specific gravity (kg/dm) 2,60 2,65 15 5 0.50 12 4 40 10 85 45 30 15 30 8 100 100 60 16 (mm sieve) 100 loo -> Cement content of the concrete is required to be 410 kg/m a) Calculate the mix proportion for the aggregates and determine Percentage passing values for the grading curve of the aggregate mixture. b) Assuming 1,5% entrapped air in the fresh concrete, calculate the weight of the ingredients in Im of the fresh concrete. c) Calculate the unit weight of the fresh concrete (use graf. strength equation with Ka= 6),