That has nothing to do with loading block on a slab, it only has to do with installing anchors into the concrete (two completely different issues and concerns).
Besides, it says the same thing I've been saying ... it depends on the strength of the concrete, not the curing time!
4.5 Fasteners are installed in normal-weight concrete that has cured a minimum of seven days OR HAS REACHED a minimum ultimate compressive strength of 2,000 pounds per square inch (13.8 MPa).
Aaron, I know you are good at spinning things, but, first you need to know what the strength of that concrete is, and *I* would *NOT* use this for fastener pullout to relate anything to loading concrete block on a slab.