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Can you lay concrete in winter?

Updated: 9/28/2023
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DavisonFrancis

Lvl 1
11y ago

Best Answer

not recommended but it can be done. I live in London Ontario Canada, all our asphalt plants close in the winter. if you have a plant open then make sure all your preperation is done before you pick up the hot mix so that it is as hot as possible when you pave. remove all the standing water, level, compact base. if you are paving over existing ashpalt, dry it as much as possible with a 30 thousand BTU tiger toarch and aply "coalash" to the edges with an old broom, once you start to rake and compress the hotmix you must work fast in cold weather so make sure all your tools are in place before you start, keep the compacting machine idling so there are no issues with start up. good luck

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Wiki User

12y ago
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Wiki User

11y ago

Yes but it is difficult and not for the faint hearted as you could end up with a pile of dust and gravel.

The hardening process of concrete occurs because the cement has a chemical reaction with the water that both produces and requires heat and heat is in short supply in winter.

There are special precautions to take if the temperature is going to be below 4C 40F.

There are a number of anti-freeze concrete additives on the market but this only stops the water from freezing which enables the initial reaction with the cement but the concrete has to be kept warm so if it's not too cold then the heat produced by the curing of the concrete may be just enough.

Using warm water in the mix will help accelerate the chemical process but this will soon go cold so again if it's not too cold then this may be just enough.

Rapid hardening cement is a finer powder that ordinary cement and will react with the water quicker and therefore produce more heat more quickly, depending on the temperature this may also help.

Covering the concrete with hessian, straw or polystyrene batts dependent on how cold it is will keep the heat in to allow the concrete to set.

Pre-treating the sub-base if it is frozen will also be required this can be done with hot water or a layer of insulation.

You can even go to the extremes of erecting a tent or warm air structure over the concrete.

It all depends on how cold it is and how much you are prepared to pay.

So how desperate are you to lay this concrete?

Of course if you are building a huge concrete dam or something you problem will be getting rid of all the heat from the chemical reaction.

Good luck, but if it's just a drive way then best wait till spring.

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