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Q. Mechanism of plastic settlement in fresh concrete?
Within a few hours after placing of fresh concrete, plastic concrete can experience cracking due to occurrence of plastic settlement andplastic shrinkage. The cause of plastic settlement is related to bleeding of fresh concrete. Bleeding denotesto migration of water to the top of concrete and movement of solid particles to bottom of fresh concrete. Expulsion of water at the time of bleeding outcomes in the reduction of the volume of fresh concrete. This persuades a downward movement of wet concrete. If such kind of movement is hindered by the presence of obstacles such as steel reinforcement, cracks will be formed.
Q. For what capacity would you design a sanitary branch sewer to serve a section having a population of 12500 persons with a rate of supply of 135 Liters. Ans.- Average flow
Q. What are advantages and disadvantage of varnishing? Varnish is a clear pale solution of a resinous substance ( like amber, common resin, copal, lac, or shellac 0 dissolved i
what is expected of them
Design a Cylindrical Open Caisson to be sunk by 30 m of sand to support a load of 50 MN. The allowable bearing pressure is 1700 kN/m 2 . Test the feasibility of sinking the caisson
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Question Will it advantageous to use concrete of very high power for example exceeding 60MPa? What are potential problems connected with high strength concrete ? Answer To in
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In a pipette analysis, 0.5 N of dry soil (fine fraction) of specific gravity 2.72 were mixed in water to form half a litre of uniform suspension. A pipette of 10 ml capacity was
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