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A concrete mix with a 3-inch slump, w/c ratio of 0.50 and a sand with a fine modulus of 2.4 contains 1700 lb/cubic yard of coarse aggregate. Compute the required weight of coarse aggregate per cubic yard. To adjust the mix so as to increase the compressive strength, the water-to-cement ratio is reduced to 0.45. Will the quality of the coarse aggregate increase, decrease, or stay the same? Explain your answer.
A soil borrow material in its natural state in the ground has a unit weight of 118pcf. Its natural water content is 7%. What is the dry unit weight of this material?
Radon from well water may pose a radiological health hazard. One treatment technique is simply to hold the water in storage, allowing the radon to decay. how large must each be to achieve the desired level of control.
Simplify the shape of the base and the 4 legs and estimate the minimum number of tugs needed to tow the structure at the required speed. The most powerful tugs can produce a thrust of approximately 2000kN,i.e.200tons.
The Pomdeterra wastewater treatment plant produces thickened sludge that has a suspended solids concentration of 3.8%. They are investigating a filter press that will yield a solids concentration of 24%.
A maximum flow rate of 6 CFS is available for a river model. This corresponds to 30,000 CFS for the prototype. What is the scale of the model in terms of the prototype size
Traffic data collected at the same time indicated an average time headway of 4 sec. Determine the (a) density on the highway (b) flow on the road (c) space mean speed.
Writing case study about bridge collapse
The Hubert H. Humphrey Metrodome in Minneapolis opened in 1982 at a cost of $55 million. To prepare for the footings, et cetera, 3.00x105 cubic yards of dirt were removed. The Metrodome's inflatable roof covers 10.0 acres and its interior volume i..
Determine the normal stress in the rails when the temperature reaches 48oC assuming that the rails (a) are welded to form a continuous track (b) are 10m long with 3 mm gaps between them.
Wishing to use pine wood in a construction project a technician finds the density of Eastern White Pine is 0.373 g/cm^3 or g/cc. What is the wood's density in pounds per cubic foot
Source and destination addresses of router solicitation, Given an IPv6 network, assume a host using EUI-64 addressing has a MAC address of00:24:E8:3D:CA:35
The void ratio of soil in the borrow pit is 1.12. Estimate the volume of soil (cubic meters) that must be excavated from the borrow pit.
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