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Not a special mix as far as I know. I would assume larger aggregate would be better(?) It may be deceiving because I took it down about a 1/4” with the grinder.

Thanks for responding. Yes, we kept wet for 7 days after it was shot. I’m not to worried about the little cracks but just want to take any precautions now before I lay tile. This is an owner builder project. I had the shotcrete guy take a look and he didn’t seem too concerned but I guess...

I’m looking at a couple cracks in the dam wall separating a spa and pool. The biggest cracks are about an 1/8” to 1/4” and seem to lead to hollow areas inside the shotcrete. I’ve leveled out the wall but haven’t started the tiling process yet. Assuming I should fill these cracks prior to...