I tried posting once and don't see it, forgive me if this repeats.

I have a block of concrete where the forms were removed after 7 days. After forms were removed there were some spots on the corner where the concrete was uncured. The field was able to easily remove the concrete in these areas and described it was a "wet, sandy" consistency.

This leads me to believe that the large aggregate was being held back by the reinforcing cage and didn't make it into this area, with that happening, more water collected here, with the cement and sand and therefore did not cure along with everything else.

I have pictures, but cannot figure out how to post them, any advice on how to do that would be appreciated.