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Question
What is the reason that vibrators not used in concrete compaction in piling works?
Answer Concrete for piles must be a high-slump self-compacting mix that is capable of flowing between reinforcement cages with simplicity. As concrete is designed to be self-compacting, vibrators are not used for given that additional compaction. Furthermore, concrete in piles is compacted by power derived from free falling. Though, if vibrators are used, vibrated concrete can be compacted to sides of concrete casings and hinders lifting up of casings.
in what condition curve s-t curve is concave and convex
Actually, drying is not directly linked to hardness in concrete. After concrete is poured, putting it in a wet environment by spraying it constantly with water will hasten its hard
#question why cracks develops on the surface of concrete on the next day of casting?
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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
with a neat well labelled sketch, explain reciprocal ranging.
Verify the grain specific gravity In a specific gravity test, the weight of the dry soil taken is 0.66 N. The weight of the pyknometer filled with this soil and water is 6.756
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