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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. Write short notes on Numerical rating of Bridges? In the numerical rating system, the condition of a bridge is represented by a number consisting eight digits. This eight di
What is the Sludge Volume Index? Two 1 L samples of mixed liquor are taken from a lagoon. After settling for 30 min in a graduated cylinder, 250 mL of solids have settled out i
how to calculate various quantities of materials for wet mix macadam and dense bitumen macadam
What do you understand by Pressure line If we determine the locations of resultant force at various sections of a pre-stressed beam, as in Example, we can draw a curve showing
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Determine the loss of fluid energy as 310 gallons per minute (gpm) of water flows through 1,000 ft of 4 inch, schedule-40 welded and seamless steel pipe. The fluid temperature is 5
Question In structure of pump troughs for accommodation of screw pumps, what is major construction process to ensure close contact between screw pumps and pump trough ? An
Q. Temporary Repairs to rail fracture? If a welding party is not readily available, the fracture shall be repaired by using a cut-rail (not less than 4 meter long) and clamped/
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Road Binders: Bitumen: Bitumen is a viscous, semi-solid material, dark in color, having adhesive properties, and derived from the distillation of petroleum crude in a refinery
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