The first photo shows the insulation/water proofing they laid beneath the slab. It was about 19 degrees when the concrete pumper truck got here this morning. It warmed up to about 40. It took longer than expected for the concrete to dry and the guys doing the finishing were here until 9PM. They said they put 1% calcium in the crete. If they put more it would dry faster but have more chance of scaling. Less calcium meant a better finish, but it takes longer to cure.
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