Augusta - 165 James St S, 14 and 26 Augusta St | ? | 6, 8 & 8 fl | Under Construction

[PaperSun]

Interesting, doesn't look like they were heating up the floor before pouring. Any concrete expert to explain ?

[Chronamut]

Originally Posted by PaperSun

Interesting, doesn't look like they were heating up the floor before pouring. Any concrete expert to explain ?

Concrete doesn't require heat - it can literally cure underwater due to a chemical reaction. Hence how they pour bridge foundations.

[TheRitsman]

Originally Posted by Chronamut

Concrete doesn't require heat - it can literally cure underwater due to a chemical reaction. Hence how they pour bridge foundations.

While cement curing is an exothermic reaction, I do believe a minimum temperature is required. I suspect that the mild temperatures have made heating the concrete not required or as required.

Also when bridge foundations are done they're usually within a dry form or a shored space with water held back. Too much water in most concrete mixes affect the end strength. I

think there are special concrete mixes that can accept more water or less heat, but those are likely specialized types that are more costly. That's why the McMaster grad building and others have huge heaters going all night while pouring concrete in winter overnight.

[Chronamut]

Originally Posted by TheRitsman

While cement curing is an exothermic reaction, I do believe a minimum temperature is required. I suspect that the mild temperatures have made heating the concrete not required or as required.

Also when bridge foundations are done they're usually within a dry form or a shored space with water held back. Too much water in most concrete mixes affect the end strength. I

think there are special concrete mixes that can accept more water or less heat, but those are likely specialized types that are more costly. That's why the McMaster grad building and others have huge heaters going all night while pouring concrete in winter overnight.

Well said! Thanks for the supplementary info!