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Is aphaltic coating for substructures necessary?

Is aphaltic coating for substructures necessary?

Is aphaltic coating for substructures necessary?

(OP)
Why is it that pilecaps are coated but the piles themselves are not? Could it be:

1) piles are in compression, as such any cracks would be closed and the reinforcements are prevented from being corroded?

2) pilecaps uses lower strength concrete?

What must i do to prove that the asphaltic coating are not required on a particular pilecap?

RE: Is aphaltic coating for substructures necessary?

The coating is to keep the de-icing salts out of the concrete.  Todays methods are to use either waterproof joints or good plumbing under open joints so that the de-icing salts do not contaminate the cap.  Therefore, no asphaltic coating is required.  Besides, where needed, a non-penetrating sealer is far better than the asphaltic coating.

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