What effect does fire have on compressive strength of concrete?

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What effect does fire after earthquake have on the strength of a concrete column?

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Adeyemi Adesina

You mean you want to improve the fire resistance of concrete? It is possible for you to improve the compressive strength of concrete, and still, have a low resistance to fire. In fact, high strength concrete has been associated with explosive spalling during a fire

Amin Ramezan Titkanlou

thank you for your answer adeyemi.