고강도콘크리트 압축강도 추정을 위한 소구경 코어 적용에 관한 연구

For the purpose of evaluating the strength of high-strength concrete, the strength of small diameter core was compared with 100, 50, and 30 mm cores. In case of high strength concrete, the smaller the core diameter, the lower the strength was. It is probably due to the disturbance of specimen during coring. Therefore, it is considered that it is difficult to apply in the field.