Concrete structures often survive fires better than steel or timber but can still suffer spalling, cracking, and strength loss from prolonged heat exposure. This paper examines fire-induced concrete damage and highlights assessment methods like pulse velocity testing, rebound hammer tests, and petrographic analysis. A case study of a fire-exposed residential foundation demonstrates that with proper evaluation, targeted repairs can restore structural integrity without full demolition, offering a cost-effective rehabilitation approach.

The definition of petrography is the branch of science concerned with the description of rocks especially by microscopic study. We, at Concrete Science, use petrography as a baseline for examining the concrete or construction material and/or the sand and gravel.