The compressive strengths of concrete in old drainage structures were measured by core test and non-destructive testing, and the neutralization depths were estimated. There are a high correlation between the core and non-destructive testing compressive strength and the carbonation depth.

• 최영(한밭대학교 산업대학원 토목공학과 석사과정) | Choi, Young
• 이형준(한밭대학교 건설환경공학과 교수, 공학박사) | Lee, Hyung Joon Corresponding author