Concrete is required for a bridge deck in Chicago. A specified compressive strength, f’c, of 4,500 psi is required at 28 days using Type I cement. The design calls for a minimum of 2.5 in. of concrete cover over the reinforcing steel. The minimum spacing between steel reinforcement is 5 in. The concrete should be designed to overcome all the environmental conditions encountered in Chicago. Refer to Textbook Chapter 12 of PCA – Design and Control of Concrete Mixes. Use the absolute volume method to design the concrete mix per 1 cubic yard. The materials

Liquid flows at steady state at a rate of 2 lb/'s through a pump, which operates to raise the elevation of the liquid 100 ft from control volume inlet to exit. the liquid specific enthalpy at the inlet is 40.09 btu/lb and at the exit is 40.94 btub. the pump requires 3 btu/s of power to operate. if kinetic energy effects are negligible and gravitational acceleration is 32.174 tt/s, the heat transfer rate associated with this steady state process is most closely 1)-2,02 btu/s from the liquid to the surroundings 2)-3.98 btu/s from the surroundings to the liquid. 3)-4.96 btu/s from the surroundings to the liquid. 4)-1.04 btu/s from the liquid to the surroundings.