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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.
The drainage system of a cantilever wall shown in Figure As 1 became blocked after a heavy rainstorm and the groundwater level, which was originally below the base, rose to1.5 (m)
I have to draw the IL for the shear at a roller support and am not sure how it should look
Q. Grouting in segmental linings in tunnels? Grouting is typically carried out under pressure in segmental linings at the time of tunnel construction due to the below reasons:
Explain in detail about Textural classification. Sketch neatly the Casagrande's plasticity chart indicating several aspects. How would you use it in classifying the fine graine
whether the wall has adequate sliding resistance
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Draw the shape of the Pressure line. Solution The locations of resultant force at sections A-A, B-B and C-C have already been determined. Joining these locations, we can dr
Determine the total head and total pressure of water flowing at in a pipe which has the following data: Flow= 2,500 gpm; Elevation = 30 ft; Pressure = 40 psi; Pipe Diameter =
The liquid limit of a clay soil is 56% and its plasticity index is 15%. (a) Name the state of consistency is this material at a water content of 45% ? (b) Determine the plas
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