Deterioration of concrete due to frost damage manifests itself in the form of scaling or micro cracks that occur limitedly in the surface of the concrete, or micro cracks spread across the entire concrete. The former has become dominant as a result of proper use of AE agents. This indicates that the depth of frost damage is a key element in evaluating the decrease in the durability of concrete structures. In this study, The depth of frost damage was evaluated through ultrasonic velocity testing and pore size distribution measurements, using a test specimen in which frost damage are simulated. Furthermore, the effectiveness of the method was verified by applying to concrete structures.
