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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.
Question What is main difference in application of surface-protecting fenders and energy-absorbing fenders ? Answer Surface-protecting fenders are fenders that make
Define Role of Diver in Underwater Inspection of Bridge? Diver's role is primarily to point out a potential scour problem. The diver can use one of the following equipment to m
Q. What do by Diaphragm wall? For the construction of diaphragm walls adjacent to buildings, former experience showed that excess slurry head above groundwater level had to be
define alternative depths
State about the pre-tensioned concrete In pre-tensioned concrete, the tendon stresses are transferred to concrete by virtue of bond of concrete to the surface of steel tend
Question For compaction of free-draining sands or gravels, what is optimum moisture content to grab maximum density ? Answer Compaction curve of dirty materials is com
Manhole covers - triangular halves Manhole covers are usually made up of two pieces of triangular plates to form a square cover. One can wonder why two rectangular halves are u
Define Diver Qualification - Diving Operation for Bridge Inspection? The requisite qualification for divers and diving supervisors are given in IS 10291 -1982, which stipulates
know the planking and strutting for shallow excavation
What is Bonded Post-tensioning In post-tensioned construction, ducts, in which tendons are provided, are sometimes grouted after the stressing operation. Though the mechanism
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