The purpose of this study is to present an appropriate application method for surface coating repair to prevent the early re-deterioration of surface-coated concrete structures. External Visual Inspection, Ultrasonic Propagation Velocity Measurement, Adhesive Strength Test Method and other investigations were…
The purpose of this study is to present an appropriate application method for surface coating repair to prevent the early re-deterioration of surface-coated concrete structures. External Visual Inspection, Ultrasonic Propagation Velocity Measurement, Adhesive Strength Test Method and other investigations were conducted for sluice structures in cold, snowy regions to clarify the nature of frost deterioration depending on differences in such environments and the causes of re-deterioration. The results revealed that the degree of concrete deterioration was higher in sections that were exposed to a direct water supply, and that it varied in line with temperature and other regional conditions. A major cause of early re-deterioration was the presence of deteriorated parts remaining on Surface coating material or patching material, which led to the progress of deterioration inside the concrete due to freeze-thaw action. It was therefore found that the durability of concrete structures repaired using the surface coating method in cold, snowy regions depended greatly on pre-repair surface preparation.