Reinforcement cover for concrete subjected to high heat
Reinforcement cover for concrete subjected to high heat
(OP)
I'm working on the design of a concrete vent system for a firing pit used to melt various metals. Anyways, I'm trying to find something in the ACI code that speaks specifically to high heat applications in regards to rebar cover. So far I've only been able to come up with references for corrosion, chemical and nuclear facilities. I've also read through the fire resistance criteria, however, that is primarily for designing the structure to survive a fire related event and avoid collapse, but not necessarily be completely usable after the event. If anyone has any thoughts on a specific code reference that might be applicable I'd appreciate it. Thanks in advance.





RE: Reinforcement cover for concrete subjected to high heat
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The quote on the abstract includes this:
"Information is also given for determining the fire endurance of certain concrete members based on heat transmission criteria."
which might touch on what you are looking for.
There is also this:
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dealing with concrete chimneys - but not sure if that would even apply - just might have info on heat and rebar cover.
RE: Reinforcement cover for concrete subjected to high heat
RE: Reinforcement cover for concrete subjected to high heat
Also, keep in mind that constant exposure to high temperature can cause a breakdown in the cementitious properties of portland cement. Generally it take temperatures of 600C to 800C for periods of 4 to 6 hours to do this. If your temperatures are sufficiently high, you might consider refractory cement rather than typical portland cement.