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Estimate the elastic, shrinkage, and total axial deformation of a concrete column after 2 years of permanent load application. Assume the full structural load was applied at 28 days after placing concrete. Summary:
Axial column load: 200,000 lb
28 days compression strength: 3000 psi
Length: 15 ft
Area: 12 in x 12 in
Unit weight: 140 pcf
Curing: 14 days of moist cure
Relative Humidity: 40%
Minimum member thickness: 12 in
Concrete consistency: 4 inch of slump
Fine aggregate: 40%
Air content: 8%
Cement content: 9.0 sack/yd^3
Chromium contamination is a problem at a number of hazardous-waste sites. At one site local concentrations of chromium reached 60,000 mg chromium/kg soil and 19,000 mg/L chromium in the water.
A frictionless piston-cylinder contains 2kg of nitrogen at 100 kPa absolute and 300 deg K. The system is compressed polyprotically at a 1.4 exponent (n) until the nitrogen reaches a final temperature of 360 deg K.
Calculate the rate of entropy change for each component of a refrigerator that uses 10 kW power, rejects 14 kW heat and has a high temperature reservoir at 400 K
an iron cube at 400 degrees Celsius is dropped into a insulated bath containing 10kg of water 25 degrees Celsius. the water finally reaches a temperature of 50 degrees Celsius at steady state.
Calculate the surface area required for a stabilization pond to serve a domestic population of 1000. Assume 80 gpcd at 210 mg/l of BOD. Use a design loading of 20 lb of BOD/acre/day.
What is the largest circle that can be inscribed within a polygon with corner coordinates (600,800), (900, 300), (500, 100), and (100, 40) Find the radius of the largest circle and show how you found it from these coordinates.
a brass wire of diameter d=1/6 in is stretched between rigid supports with an initial tension T of 37lb. assume the coefficient of thermal expansion is 10.6X10^-6 / F and the modulus of elasticity is 15X10^6 psi.
how many cubic yards of aggregate must be ordered for a road base 16 inches thick and 2000 feet long with a top width of 30 ft, if the side slopes are one on one, or 45 degree
Determine the number of completely mixed chlorine contact chambers each having a detention time of 30 min that would be required in a series arrangement to reduce the bacterial count of a treated effluent form 10^6 to 14.5 organisms/mL
How much annual income would be need to be generated over a 5 year period to be equivalent to $4,000 over an 8 year period. Consider 6% nominal interest (compounded annually) for both cases.
Supporting soil has a unit weight of 125 pcf. The results of laboratory tests on the soil samples indicated that the supporting soil's cohesion and angle of internal friction are 1200 psf and 25 degrees, respectively.
A constant head permeameter has a sediment sample with a cross sectional area of 100 cm^2. The sediment sample is 30 cm long. The porous plates on top and bottom of the sample holding it in place have a vertical hydraulic conductivity of 0.001 cm/s a..
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