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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.
what is elasticity
Effect of rusting on steel reinforcement Corrosion of steel reinforcement inside a concrete structure is undesirable in the subsequent ways: (i) Presence of rust impairs
Q. Coating on concrete – complete im-permeability to moisture? In designing protective coating on concrete structures, stoppage of water ingress by the coating is generally req
Question Why are voids filled with lightweight infilling material in raft base of pumping stations ? Answer To decrease dead load and therefore to decrease settleme
Explain briefly shallow foundation?
design
Question Give a reason that why are high and narrow beams not desirable in concrete piers? Answer Supported on past experience in other, high and narrow beams after
WHAT IS PILE CORROSION
Q. Function of prime coat in bituminous pavement? The main function of prime coat in bituminous pavement is to protect the subgrade from weathering andmoisture. Because the pre
Material for formwork and their specifications
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