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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.
Define Dual frequency and colour fathometer - Sounding/Sensing Devices? Dual Frequency and Colour Fathometers can be used to detect refill in the scoured area since more than o
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Q. What are Service reservoirs? Service reservoirs, other than normal reservoirs are provided due to the subsequent reasons: (i) In case of breakdown of pumping stations a
Incoming water contains 2.5 mg/L as a substance of natural alkalinity (HCO 3 - ). The flow rate is 9.5 ML/day). (a) What feed rate is required if the alum dose is 7 mg/L and
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The continuous one-way slab shown below is loaded with a uniform service live load of 80 psf, and a superimposed dead load of 40 psf. Assume the beam width is 16" and use f'c = 5 k
Q. Define Well Steoning? It is the side wall of well foundation. It is built of masonry or cement concrete not less than M 10 grade, sufficient bond rods should be provided to
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Question What is meaning of driving succession of driven piles? Answer In Basement construction, if piles are driven from centre to perimeter, there is a propensity o
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