Why pile chipping is required before the pile cap works


Why pile chipping is required before the pile cap works?

Piles are casted with high slump concrete, during the concreting of piles, there is a chance that fines from concrete might accumulate at the top and also if there is any slush in the bored pile, it will also come up during concrete. So the concreting of pile is basically overflowed to take out all impurities.
After casting of the piles, the top portion of the pile is chipped out till the pile cap or beam bottom level.

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