Evaluation of the Frost Damage Resistance Based on Adhesion in Inorganic Repair Methods

Frost damage of the concrete in agricultural irrigation facilities in cold regions has been repaired and the structures have been reinforced to protect against such damage in recent years. However, repair and reinforcement are not permanent measures guaranteed to extend the service life, but cracking, flaking, peeling, chipping and other types of deformation often occur after such works. As part of the Ministry of Agriculture, Forestry and Fisheries' Public-private Partnership New Technology Research and Development Project, the authors have developed two different repair/reinforcement methods using blast-furnace slag material, which is highly resistant to freeze-thaw action. In this study, the frost damage resistance of the two inorganic repair methods used in the above two methods was evaluated based on adhesion. It was demonstrated that performance change in repair materials, test boards, and near their adhesion interfaces can be evaluated using the existing two freeze-thaw test methods, and the test results indicated excellent frost damage resistance properties of both of these repair methods.