재래 및 비파괴검사를 이용한 고강도 콘크리트의 재료특성에 관한 연구

Abstract

This study is to characterize the material property of early age high performance concrete emphasizing comprehensive strength using nondestructive testing methods. Three high performance concrete slabs of 600, 850 and 1100kg/sq.cm compressive strengths were prepared together with cylinders from same batches. Cylinder tests were performed at the ages of 7, 14, 21 and 28 days after pouring. Using the impact echo method, the compression wave velocities were obtained based on different high performance concrete ages and compressive strengths. The equation to obtain the compressive strengths of high performance concrete has been developed using the obtained compression wave velocities. Using the SASW (spectral analysis of surface wave) method, the equation have also been developed to obtain the compressive strengths of high performance concrete based on the surface wave velocities.