Cold Weather Concrete Pile Pour

[dreschke]

I saw another thread on this site about pouring concrete in freezing weather and thought I would canvass subscribers on a concern I have. We are doing some reno's at the house that entail pouring 9 concrete piles about 4-5 feet deep. The guys were doing it today in -15 C weather which has me a little concerned, though admittedly I know very little about the subject. Will the concrete curing heat plus the ground heat/insulation be sufficinet to allow the concrete to cure properly? Or should we expect trouble? Would very much appreciate the more-knowledgeable feedback of others. Thx.