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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.
Geotechnical project specifications require that the soil's optimum moisture content of 24% be maintained during the roadbed's construction. The field moisture test finds that fi
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What is Under vibration of fresh concrete?
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
Features of a Stratigraphical Survey phase The principal features of a Stratigraphical Survey phase are: a) Determination of depth of ground water, thickness, extent and ap
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