2 Month Old Concrete, Already Has Cracks

[jw3571]

This is really upsetting, I had the concrete poured around 2 months ago and some light spider web cracks. Is this normal to crack so soon? Is there anything I can do?

 

[palmab]

I had the very same thing happen to newly poured concrete, but it was right after the first winter it saw. Only a few months after it was poured. It was a rough winter with lots of temp changes. I just sealed the cracks with DAP sealer.

 

[Steroblan]

The expansion joints and score cuts are to help control where the concrete will crack. So the question is when will it crack not so much if.

 

[boobag]

concrete floors need a troweled in expansion joint, or it needs to be saw cut the day after pouring, every 12' or so. this will help control the cracks that WILL occurr.

 

[whitedogone]

Two things about concrete:

1. It cracks
2. Nobody is going to steal it

 

[CNGsaves]

OP . . . it depends if your "spider web" cracks are cosmetic only . . . OR . . . more serious cracks indicating settling of the entire pad in that area.

Post up pictures of problem areas. Let's SEE what you're talking about.

 

[ms fowler]

Spider web cracks are more likely due to excessive water when placed. Specs usually allow a 3" to 5" slump, but the crews like it wetter--like around a 7" as its easier to work.
Hint for anyone thinking about having a slab poured---talk with the contractor and the concrete supplier about the cost of plasticizer being added to the mix. It'll make a 2" slump work like a 7"

 

[Scsmith42]

Spider web cracks are more likely due to excessive water when placed. Specs usually allow a 3" to 5" slump, but the crews like it wetter--like around a 7" as its easier to work.
Hint for anyone thinking about having a slab poured---talk with the contractor and the concrete supplier about the cost of plasticizer being added to the mix. It'll make a 2" slump work like a 7"

^ this is very good advice.


Scott

 

[DonPowers]

Here is some info on concrete cracking.

http://indecorativeconcrete.com/idcn/wp-content/uploads/2012/02/Why-Concrete-Cracks.pdf

 

[willymakeit]

^ this is very good advice.


Scott

Ditto. One of the names for it is Super P.

 

[Showkey]

Two things about concrete:

1. It cracks
2. Nobody is going to steal it

Three things.......its grey

 

[Mr onetwo]

too much water in the mix and not keeping the slab wet enough after power troweling