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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.
i want a complete flow chart of dry process of cement
What is Froude Number? Used to determine if the flow is rapid, critical or tranquil. Fr = 1 critical flow; Fr 1 supercritical flow In rectangular open channels: Fr =
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The sketch shows a common consumer product called Water Pik. This device uses a motor to drive a piston pump that produces a jet of water (diameter d = 3 mm, temperature T = 10 °C)
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An I-section beam 350*200mm2 has a web thickness of 12.5mm & a flange thickness of 25mm. It carries a shearing force of 200KN at a section. Sketch the shear stress distribution acr
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