2019 Volume 73 Issue 1 Pages 155-162
In this study, as a fundamental study on the applicability of the aerial ultrasonic wave method for evaluating the aged deterioration of concrete buildings, the accuracy of internal evaluation for the cracks and poor filling areas affecting the corrosion of reinforced steel bars and PC steel bars in the concrete buildings were examined. The following results were obtained in this study. By applying the aerial ultrasonic wave method proposed in this study, it was possible to evaluate the projected area of the cracks projected on the concrete surface, the filling defect area more than 4.5mm width around reinforced steel bar and the location of sheath tube. However, it was difficult to evaluate the angle of cracks, the location of reinforced steel bar and the filling defect area of grout in sheath tube regardless of the evaluating indexs.
