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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.
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An activated sludge tank treats 1 MGD from the primary clarify and has an X of 2200 ppm SS. The water euent is 0.9 MGD. 1.0 MGD of the sludge is recycled back into the tank and has
What is the calculation method of load bearing capacity of formwork material?
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
Question For rigid pavement, what is recompense of using lean concrete sub-base instead of traditional granular sub-base? Answer There are some shortcomings of using
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if the diameter of the base remains constant by what factor should the altitude be multiplied to produce a cone with twice volume as the original
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