Foundation, Concrete and Earthquake Engineering

How Thermal Damaged Concrete can be Repaired?

Repair of concrete that has suffered thermal damage is a difficult problem. Proper patching procedures for spalls and popouts must be meticulously followed, and the repair material should have similar thermal characteristics to the original concrete. Even so, the repairs may only be temporary. Overlays using heat resistant concrete are a potential repair for scaled areas or for areas with concrete of poor heat resistance. If scaling is due to a paste on a concrete surface that is otherwise acceptable, grinding the surface may be adequate.

Joint sealant used in concrete pavements exposed to high temperatures should conform to Federal Specification, SS-S-200E. This specification does require testing of the material at 500 degrees Fahrenheit (260 degrees Celsius) for 2 minutes so that some resistance to high temperatures can be achieved.

The old mansion ruins just outside the Bacolod, burned by American forces, World War II 
However, when high temperatures are combined with jet blast, the sealant may still be damaged or blown out of the joint. Under these circumstances, increased periodic resealing must be accepted as routine maintenance. Conventional concrete and joint sealants should provide reasonable service up to concrete temperatures of about 500 degrees Fahrenheit(260 degrees Celsius)

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