Temperature Resistance of concrete floor

Q. I am planning on installing a walk in oven to dry aircraft parts. The temperature required to do this is 450 F. I have been told that the concrete in the oven floor will not stand this temperature. However, I already have one oven in operation to that temperature, with no apparent coating on the floor. The concrete appears to be just normal run of the mill concrete that you would purchase from a concrete company, nothing special.

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