Under Natural Conditions, Concrete Works with The Simultaneous Total Effect of Several Force, Which Include: External Load, Temperature Stresses, Internal Stresses From , The Effect of Freezing Water. The Chemical Effect of Water and Salts Dissolved in IS Also Possible. In ORDER to Systematize the Processes Developing Concrete During Its Repeated Freezing and Thawing, It Shoup Be Classified in Reegree of Complexity of the STRUT Ure of the Material.