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The pavement structure consists of 160 mm of hot-mix asphalt (HMA), 150 mm of granular base and 450 mm of subbase placed over silty clay subgrade. The pavement is 20 years old and its current PCI is 50. The pavement currently exhibits low to medium and localized high severity alligator cracking, low to medium severity rutting, low severity raveling and low severity block cracking. The anticipated traffic loading is 10,000,000 ESAL's. The cost of construction is as follows: HMA $90/t of surface course and $70/t of binder course; granular base $18/t; subbase $12/t; tack coat $0.4/m2. Assume the following other costs, if you need them: CIR $14/m2; FDR with Foamed Asphalt $15/m2; crack rout and seal $2.5/m; and patching (mill 40 mm and patch 40 mm) $15/m2. If you consider a structural overlay, assume 40 mm of HMA surface course and 50 mm of binder course. Assume a discount rate of 4%. Carry out life cycle cost analysis.
The spillway for a dam is 20 m wide and is designed to carry 125 m3/s at flood stage. A 1:15 ratio model is constructed to study the flow characteristics through the spillway. The effects of surface tension and viscosity can be neglected.
The buildings are single story with a rood line 6 feet above the man-door opening is constructed from clay brick that is 12 inches thick and weighs 115 psf. the opening of the man-doors are 3 feet 4 inches wide.
A new sports car has a drag coefficient of .30 and a frontal area of 21 ft^2, and is traveling at 110 mi/h. How much power is required to overcome aerodynamic drag if p=.002378 slugs/ft^3?
Oil with a kinematic viscosity of 0.0035ft3/s flows through a 4-in-diameter pipe with a velocity of 15ft/s. What will be the approximate distance from the pipe entrance to the first point
Two forces are applied to the vertical post. Determine the force and couple at O equivalent to the two forces.
using the principles to developed in chapter 3 on equilibrium, one can determine that the tension in cable AB is 143.4 N. Determine the moment about the x-axis of this tension force acting on point A.
Cylindrical, steel bar stock (density = 7833 kg/m3, Cp = 0.465 kJ/(kg C)) of 10-cm diameter is heat-treated by drawing it at a velocity of 3 m/min through a 6-m-long furnace maintained at 900C.
The water depth before the jump is 0.4 m and after the jump is 1.7 m. Compute the flow rate in the channel, the critical depth and the headloss in the jump.
If the allowable shear stress is 15ksi, determine the diameter of a solid shaft if it is to transmit 50hp at a frequency of (a) 900rpm, (b) 1800rpm
A plate storage system for a self-serve salad bar in a restaurant. As plates are added to or withdrawn from the stack, the spring force and stiffness are such that the plates always protrude above the tabletop by about 60 mm.
What is the theoretical maximum amount of work that could be done by a gas in a piston expanding from 10 L to 20 L (pressure of the surrounding atmosphere is 100 KPa)
A gas is compressed at a constant pressure of 0.800 atm from 9.00L tp 2.00L. in the process, 400J of energy leave the gas by heat. (a) What is the work done on the gas? (b) What is the change in it internal energy?
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