Water Cooling for Large Diameter Column

Fresh concrete is already water saturated.

Reality is a cruel mistress.

Cons=many.

Pros= none.

no dice

Won't work well.

I'd use Ice cubes instead of water!

Hold on. I have a better idea: use air!

I am pretty sure the concrete will cool down over time. Do you know where the heat comes from in your concrete? Why do you want to cool it?

Yes I know. But it seems OP does not consider this an option. Maybe he can consider it now!

Maybe he did not know this before. Now he does!

Yupp! And myself!

Is it possible to use air to cool big RC column?

Here the way they cooled the concrete in a dam. Here is a method for pouring concrete underwater. And some basics on concrete.

Ok. 'Allowing fresh concrete to become water saturated'. In construction, we call that adding to the slump, and it's not legal construction in the U.S.. Cooling concrete, such as underwater pours, is incidental. The heat is what is doing our work in curing for us. Adding water takes away from the concrete's ability to cure properly, which gives a substandard product. Dilutes the chemical bonds it needs and takes away the heat generated by the calcium.

I have seen this done in the past to delay "curing" of the cement.

It apparently worked well as I have been fortunate enough to have recently revisited some of these sites and the structures are still solid with no evidence of spalding and are still mechanically performing well in the presence of very high vibration.

I have not seen this used in several years I assume because we have impressive chemicals as well as cooling and heating equipment today that control the batching process and curing time of the cement which was not available during those years.

Unfortunately not being an expert in concrete cement from those times, I cannot pass on the details you are needing to know.

I suggest you post this on U-Tube or other website and poll the general population for input as it might be productive.

Increasing the pozzolan ratio will increase cooling factors.

The pozzolanic reaction between pozzolan and lime generates less heat, resulting in reduced thermal cracking when pozzolans are used to replace portland cement.

Final cure strength characteristics will need to be evaluated due to formula modification.

When they did that job here in Canada, they waited until winter. First time they did it, it was in the summer, and it started to boil. Needless to say, project was ruined. They are building it again, this time in weather as cold as they can get! When the outside temp plunged to ten below zero C., they poured. Worked like a charm. When we had a un-predicted thaw, there were a lot of worried looks on the engineer's faces over there! But it turned out okay.

Of course, the specified mix WAS pretty hot! Possibly you don't have that option.

I understand the hoover dam was laid with water bearing pipes running through it to cool it off. How did that work? I have heard of fairly thick slabs being flooded in order to keep them cool, but never a column! The rebar should not allow any water to flow around it...it should be tight!

Hire an engineer if in doubt.

Nice thing...