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QuestionWhat are the key problems if use pumping for concreting works?
AnswerIn pumping operation, force exerted by pumps have to overcome friction involving concrete and pumping pipes, weight of concrete and pressure head when placing concrete above pumps. In actuality, as only water is pump able, it is water in concrete that transfers force. Major problems associated with pumping are effect of isolation and bleeding. To rectify these adverse effects proportion of cement is increased to improve cohesion sequentially to decrease segregation and bleeding. On other hand, the proper selection of aggregate grading helps to get better pump capability of concrete.
Formaldehyde and phenol are polymerised to resultant product that was known as Answer: This is known as bakelite.
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A contractor is bidding a construction project that will take 12 months to complete. The terms of the bid provide that the owner will pay the Contractor one lump sum at the end of
Q. Necessity of pile tip cover for rock-socketed H-piles? In current practice concrete cover is generally provided at the pile tips of pre-bored H-piles socketed in rock. The o
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Define the Limitations of shock transmission unit? STUs are not intended for energy/shock absorption. They simply transmit load from one part of the structure to another thus s
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Determine the loss of fluid energy as 310 gallons per minute (gpm) of water flows through 1,000 ft of 4 inch, schedule-40 welded and seamless steel pipe. The fluid temperature is 5
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