Question

1. In the process of concreting a wall form:
a. What type (shape) of lateral pressure does concrete exert on a wall form if the concrete is cast continuously?
b. Why is concrete often placed in stages (layers) when concreting tall walls?
c. What would happen if consolidation/vibration is performed at random depth?
d. What is the amount of maximum lateral pressure of concrete on the wall (p in PSF) if the concrete density is 150 PCF and wall height is 10 ft?
e. Compute the total pressure (P in lb/ft) and its location of the hydrostatic concrete on the wall?
f. What is the maximum pressure (p in psf) for the same concrete when placed in layers of 2.5 ft? Assume for simplicity a trapezoidal shape of pressure as shown in lecture note
g. Compute the total pressure (PT in lb/ft) and its location of the total pressure of concrete in Problem (f)?

Answer 1

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