In the current concrete structure of the highway is still the major problem most of concrete deterioration caused by the freeze-thaw and de-icing salt, which is of issues that are not completely resolved. In particular, a single freezing event does not cause much harm, durability of concrete under multi-deterioration environment by repeated freeze-thaw and de-icing salt is rapidly degraded and reduce its service life. In this study, to considering environmental characteristics when design and construction of concrete structures, the exposure environmental guidelines were established by investigation the application rates of de-icing salt, temperatures and snowfall characteristics during five years (2004∼2008) by regions. Also, damage condition and chloride content of the structural at regions of moderate and severe environmental exposures were investigated.

• 최윤석(한국건설생활환경시험연구원, 융합기술본부, 연구원, 공학박사) | Choi, Yoon-Suk
• 김영근(한국건설생활환경시험연구원, 융합기술본부, 본부장, 공학박사) | Kim, Young-Geun
• 최재석(한국건설생활환경시험연구원, 융합기술본부, 팀장, 공학박사) | Choi, Jae-Seok
• 장필성(한국건설생활환경시험연구원, 융합기술본부, 선임연구원, 공학석사) | Jang, Pil-Sung
• 이병덕(한국도로공사 도로교통연구원, 환경연구실, 수석연구원, 공학박사) | Lee, Byung-Duk