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A concrete mixture ratio of 1 part cement, 3 parts sand, and 3 parts aggregate will produce a concrete mix of approximately 3000 psi. Mixing water with the cement, sand, and stone will form a paste that will bind the materials together until the mix hardens.
â¢ 28-day minimum strength of 2,500 psi (17 MPa) Control of Quality -Section 347-4Control of Quality -Section 347-4 347-4 Control of Quality. 347-4.1 Concrete Mix Design: Before producing any concrete, submit the proposed mix design to the Engineer on a form provided by the Department. Use only concrete mix designs having prior approval of the Engineer.