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10 degrees and concrete coming

tomstractorsandtoys

tomstractorsandtoys

Well-known Member
My son is concreting his shop floor 40x60 today. It is 10 with a brisk west wind. Not a good day but this is the schedule. They are adding cloride and we will be heating the shop with a blow heater the next week or so. I might get my shop back again in a few months. Tom
 

Sets up faster with it in there. They probably will heat the water too. Poured a lot of concrete in this type of weather.
 
We have used chloride and at times when my sawmill was active, we have put a couple of inches of sawdust on it.
 
Possible the ground is frozen.
Calcium cost me about 6 to 7 dollars extra and hot water about the same.

This is a pic a day after.
cvphoto113050.jpg

My finisher applied cure and seal.

Some predicted my concrete finisher didn't know what he was doing. Mt floor was pot down in January 2020, temperatures about 30.
To date my 5.5 inch floor hasn't cracked.
 
Ditto. Ive seen too many pours just lay there in cold weather without chloride.

A simple sheet of plastic can help hold heat and keep it hydrated as it cures if choose to.
 
We did a floor a few years ago. Forecast called for warmer weather, was 4 fahrenheit when the truck came 7AM. We were surprised the masons didn't cancel. They poured it, bullfloated it, covered with blankets and left. Concrete was okay but we had to go over the whole thing with self leveling before finish floor was applied.
 
They use calcium I think it is around here, but something to make it setup faster.

I added a room to my house, when living in town, and did the slab prep myself. Found a finishing contractor to order the MUD and install it. Was cold but not that cold. What started out to be a few hours job wound up being all day and part of the night because they forgot to tell the concrete co. that they wanted calcium in it and the co. didn't add any arbitrarily.
 
(quoted from post at 11:09:51 01/05/22) We did a floor a few years ago. Forecast called for warmer weather, was 4 fahrenheit when the truck came 7AM. We were surprised the masons didn't cancel. They poured it, bullfloated it, covered with blankets and left. Concrete was okay but we had to go over the whole thing with self leveling before finish floor was applied.
Click to expand...

So, did you pay them for the whole job, or only the 1/2 that they did??
 
Heat the shop why put the chloride in. Also it will start to rust the rod or any thing steel in the concrete when done till the day it is taken out. I would not use chloride anymore. Inside a building like that just cover and heat in there will be fine. More concerned for the outside edges and where doors are. Put a row of straw around the edge to help there. Tarp then the straw. Plastic then put loose straw on the top will help a lot too. We have done that in the past. As it sets you can without roughing the surface shake out straw bale slices on the surface.
 


Ten years ago our town had a dam poured just before a down turn in the temp. I went to see what they did and found they put electric blankets over it. Since then I have seen it done various times. On one project it was looking like it might get cold so the GC had blankets and generator delivered just in case but they didn't need them. Don't worry about the weather. Full Speed Ahead!!
 
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