RH Testing Thick Slabs

[CCR]

Since retrieving the Wagner reader in concrete deeper than the length of the reader is tricky, I set my sensors for the 18" slab at 5". My readings after 72 hours were all in the mid 90s. So you can pretty much figure the 40% depth of 7.2" would have been in the mid to upper 90s. ph tests confirmed the concrete was not ready for installation as those were all at 11 - 12.

Even without the thickness, the concrete was power troweled so much it was almost black. No way this slab is ever going to dry.

I will be following up with the contrator in a few days as a courtesy, as I did recommend the installation of a properly installed moisture mitigation system.