Development of a damage-recovery relationship based on variable re-curing of fire-damaged high-strength mortar

Concrete undergoes a deterioration of properties when exposed to high temperatures such as those during a fire. This deterioration is caused by thermomechanical and thermo-hydral processes, and is typically qualified by cracking, loss of strength, and explosive spalling. In order to repair these damages, the damaged concrete is removed and a patching material is cast to restore strength, durability, and fire performance as necessary (Tovey, 1986).