Evaluation of Material Properties for Marine Concrete Structure Based on Impact Echo Method

摘要

Evaluating the soundness of concrete, impact echo method offers the dynamic elastic modulus of specimens which are different with static elastic modulus tested by uniaxial compression test. Thus, this paper investigates the relationships between dynamic and static elastic modulus based on in-situ concrete cores. Also, dynamic elastic modulus was compared with compressive strength. Concrete cores were obtained at three different harbors which were located at Incheon, Wando, and Masan. In order to investigate the influence of exposure condition on the relationship, air zone, splash zone, and tidal zone were selected. Different harbors showed the different relationships between dynamic and static elastic modulus, but exposure conditions have no influence on the relationship between dynamic and static elastic modulus. Also, the relationship between dynamic elastic modulus and compressive strength has the same tendency as the relationship between dynamic and static elastic modulus. The relationship equations were proposed to estimate the relationships properly.