no cracks in SOG
no cracks in SOG
(OP)
Fellers,
I am designing a containment control system. It is all concrete inside an existing building measuring 8" deep, 70'-8" long x 23'8" wide. The SOG is 8" thick and we will place rebar 3" from the bottom. We need the concrete SOG not to crack. We will add wwf mesh in the top and possibly also use fibermesh concrete. What spec should i use for shrinkage compensating concrete?
thanks all
T
I am designing a containment control system. It is all concrete inside an existing building measuring 8" deep, 70'-8" long x 23'8" wide. The SOG is 8" thick and we will place rebar 3" from the bottom. We need the concrete SOG not to crack. We will add wwf mesh in the top and possibly also use fibermesh concrete. What spec should i use for shrinkage compensating concrete?
thanks all
T






RE: no cracks in SOG
RE: no cracks in SOG
You might also consider one or two layers of poly under the slab to reduce the subgrade friction coefficient. Do not use any thickened footings as they will add to the drag. Make sure the edges are free to shrink and not restrained by adjacent construction.
You might also check the area of steel provided against that recommended in ACI 350.
RE: no cracks in SOG
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No matter what technique you use, wet curing the concrete for at least a week will help a lot.
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RE: no cracks in SOG
http://www.ctscement.com/SystemK_Spec.asp
RE: no cracks in SOG
RE: no cracks in SOG
RE: no cracks in SOG
RE: no cracks in SOG
if you need to absolutely eliminate cracking, i think post tensioning is the way to go
if you just need to eliminate cracking due to shrinkage... why not add pour strips around the perimeter?
RE: no cracks in SOG
RE: no cracks in SOG
b. ... concrete will still be exposed to temp changes
c. ... shrinkage
I think you guys are playing to much of the "well if this happens... and then if this happen... and if that happens... the slab won't crack" game
you can't eliminate cracks in the RC structures only control them... you need to PT if you want to be sure the slab won't crack
RE: no cracks in SOG
Dik
RE: no cracks in SOG
Way cheaper then post-tensioning. Contact your local dealer. They will probably do the work for free.
RE: no cracks in SOG
when i see containment I think nuclear... if it's water this is a totally different story