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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 the sucker deck principle for changeable depth bridge decks ? Answer For a variable depth bridge deck, depth of continuous multi-span bridge deck is greater tha
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A 9 metre high retaining wall retains a soil with the following properties: φ = 36°; γ = 18 kN/m 3 . What will be the enhance in horizontal thrust if the soil slopes up from the
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how to solve ild and rolling load problem for shear force and bending moment with the diagram.
Moisture-Density Relationship: Since various compactive efforts result in varying degrees of compaction, it is necessary to standardize the compactive effort. The most well-kn
Concrete Pavement: Thickness The thickness of concrete pavements is determined from the stresses induced due to loads and temperature. The thickness adopted is genera
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