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Contraction joints in swimming pool base?

Contraction joints in swimming pool base?

Contraction joints in swimming pool base?


Is it effective to use contraction joints on the base slab of a large swimming pool? What if I cast with just construction joints?


RE: Contraction joints in swimming pool base?

Interesting. Not sure about how classify it as effective vs non-effective but depending on the dimensions/thickness of your pour would probably be necessary. The concrete will crack no matter what you do so placement of contraction joints would be necessary to control the location of these cracks where they can be managed.

I would suggest the solution lies less in the effectiveness of the joints themselves and is better spent using the joints as part of a comprehensive crack minimizing solution. For instance, consult with a mix expert to minimize shrinkage cracks possibly through the use of fiber reinforcement, ensure sub base is sufficiently compacted before the pour, use waterstops in all contraction joints, and locate contraction joints at a more conservative spacing.

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