Question

Problem 1:

Assume the mix is made with Type I cement, with no pozzolans or admixtures, and that the temperature of concrete at placing is 75°F. The unit weight of concrete is 150 pcf with a slump of 3.75 inches.

Design forms for 13’-8” high wall to be concreted at the rate of 6 ft per hour, internally vibrated.

The forms will be used only once, so short-term loading stresses will apply.

Use form grade plywood sheathing 7/8 in. thick in 5×10-ft sheets, and 5,250-lb coil ties are on hand.

Framing lumber of No. 2 Douglas Fir-Larch is to be purchased as required

Problem 2:

Draw the pressure diagram for a wall form 15 feet tall in which concrete will be placed at a rate R = 10 feet per hour when the temperature is 60oF. Draw the diagram if the wall were only 6 feet tall.

Answer 1

● The question is very lengthy you must have patients to understand it.

Thank you.