This paper presents the surface-wave based non-destructive evaluation on crack repairing performance in concrete. Concrete specimens with different crack depths and identical compositions were prepared for surface wave transmission experiments. Cracked concrete specimens were perfectly repaired through epoxy injections, and recovery of transmission coefficients and spectral energy were confirmed in process of crack repairing. Additionally, the effectiveness and feasibility of spectral energy based assessment techniques for the evaluation of crack in concrete is also investigated.

Abstract
 1. 서 론
 2. 실험 계획
  2.1 실험체 제작
  2.2 표면탄성파 투과 실험
 3. 실험 결과 분석
 참고문헌

• 안은종(울산과학기술원 도시환경공학부) | Ahn, Eun Jong
• 신명수(울산과학기술원 도시환경공학부) | Shin, Myoung Su 교신저자