This study is to analyze the causes of damage on additional facilities in road. In this study, lab test was performed using field core sample. The result of The compressive strength of concrete is met with the design regulations. However, the chloride content of in concrete increased up to 2cm. The microstructure and reactant analysis identified an expanding substance on the surface. However, as the time increases, the depth is expected to be deep.

Abstract
 1. 서 론
 2. 실험개요
 3. 실험 분석 결과
 4. 결 론

• 박광필(군산대학교 토목공학과) | Park Kwang Pil 교신저자
• 이승태(군산대학교 토목공학과) | Lee Seung Tae
• 황재남(군산대학교 토목공학과) | Hwang Jae Nam
• 하상욱(빌드켐(주)) | Ha Sang Wook