Pouring Concrete in Cold Weather

[hyperlitejb]

I'm supposed to have a slab poured for my barn on Saturday, but I think it's a little cold for pouring. Any concrete guys have input on pouring during this cold of weather?

[Coach W]

Im pretty sure its too cold to have a nice strong concrete
70°F – 6 hours

60°F – 8 hours

50°F – 11 hours

40°F – 14 hours

30°F – 19 hours

20°F – Concrete will freeze

[bboswell]

40 degrees and rising is what most engineers require.

[Cabela]

If it's in Hockley and you don't pour too early you will be fine. High is 55 that day. What time is it scheduled for?

[Sticks&Strings]

I wouldn't do it. Cool is great for it but it's too cold now. WIt til it gets back in the 50's. It will cure nice and slow.

[hyperlitejb]

It's actually in Lexington on Saturday at 10am. Seems like the temperature would be right that day, but on Monday it could get pretty cold again.

[hammackc]

Needs to be 40 degrees and rising when the pour starts, if it is supposed to freeze within 48 hours of that cover it with poly, or blankets if available, keep covered for a week if possible, it can crumble out if water in pour freezes, aint cheap to pour so dont let em cause you headaches!

[bows08]

40 degrees and rising is what most engineers require.

Needs to be 40 degrees and rising when the pour starts, if it is supposed to freeze within 48 hours of that cover it with poly, or blankets if available, keep covered for a week if possible, it can crumble out if water in pour freezes, aint cheap to pour so dont let em cause you headaches!

Yep!

[ClayW]

We pour all the time in below freezing temps. Our only preference is to pour when the temps are on the rise. When you are done, cover with plastic or concrete blankets to keep the frost off and you will be fine. Believe it or not, the slower the concrete is allowed to cure, the better.

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[Dale Moser]

They have additives now, but I have no idea how effective they are.

I do know that when the people from Exreme Home Makeover, poured a slab up the road from us, it was 30 degrees when they started. It was 25 when they finished and they were framing on it within 6 hours. The same people who took a house that previously flooded with 2 feet of water in it, and they raised it up 18 inches.....

[KC Huntin]

40 degrees and rising is what most engineers require.

Hes got it

[Cabela]

It's actually in Lexington on Saturday at 10am. Seems like the temperature would be right that day, but on Monday it could get pretty cold again.

Looks good to me, but that's just me. Ask your concrete guy his opinion on an accelerator if you're worried about it.

[Deb]

40 degrees and rising is what most engineers require.

We have been in constuction for 40 years. We specialized in concrete for a lot of that time. Go with bboswell's advice.

[hyperlitejb]

40 degrees and rising is what most engineers require.

Rising for how long? 35 that morning up to 58 mid day then it drops again.

[Dale Moser]

You should be ok, I wouldn't start working on it for several days though.