3 day cure for a slab

[beej67]

I'm remodeling my house, including a small expansion of my slab. Maybe 10 ft by 30 ft. Contractor wants to save some time (as do I) and has recommended starting framing over the slab after a 3 day cure instead of 7 days.

Thoughts? Residential construction isn't my primary field.

Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East -

http://www.campbellcivil.com

 

[cvg]

all depends on the mix design, curing and loads. good mix and cure and it can handle moderate loads. Ask for a structural mix, at least 3,000 psi and preferably 4,000. might cost slightly more, but worth it

 

[hokie66]

Slab on ground? Not a problem.

 

[beej67]

It's probably cheap residential mix. Maybe 2500 psi? Not sure. Slab is on grade.

Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East -

http://www.campbellcivil.com

 

[Ron]

beej67...not really a problem, except anchorage. Use a bit stronger concrete so that anchors don't crack the edge. Other than that, not an issue. If they use adhesive anchors, won't be an issue either way.

 

[dik]

Two sawcuts?

Dik