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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.
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
Wind Force acting on truss
How can I get theratio of the maximum deflections of a beam simply supported at its ends with an isolated central load and that of with a uniformly distributed load over its entire
Uncompacted bedding for concrete pipes In the middle third of the base of precast concrete pipes, bedding layers are suggested to be left Uncompacted since it helps to decreas
Supplementary or Untensioned Reinforcement It is that reinforcement, provided in prestressed concrete member, which is not provided in a stretched condition like tendons.
what is the advanantage& dis advantage
Explain the Underwater inspection procedures - inspection of bridge? Under-water bridge inspection, especially the initial inspection, requires careful planning to ensure that
They stop, or slow down erosion, and stop long shore drift. This, though, can have bad knock-on effects somewhere near.
An oven-dried soil weighing 1.89 N is placed in a pyknometer which is then filled with water. The total weight of the pyknometer with water and soil is 15.81 N. The pyknometer fill
Q. Concrete cover to enhance fire resistance? In the event of exposing concrete structures to a fire, a temperature gradient is established across the cross section of concrete
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