Railway construction is divided into trackbed and railway. The railway is divided into the gravel ballast and the concrete ballast track structures. In recent years, concrete ballast track construction is increasing for Durability and Maintenance. But During construction or operation for characteristics of concrete, defects of sleepers and concrete ballast track may arise. Some of the defects was analyzed that the main pattern and this study will be introduced in that pattern.

• 이유석(한국시설안전공단 시설안전연구소 선임연구원) | Lee, Yu-Seok
• 정재훈(한국시설안전공단 시설안전연구소 연구원) | Jung, Jea-Hoon
• 성주현(한국시설안전공단 시설안전연구소 선임연구원) | Sung, Ju-Hyun
• 박광순(한국시설안전공단 시설안전연구소 기술표준화그룹장) | Park, Kwang-soon
• 오영석(한국시설안전공단 일반철도실 실장) | Oh, Young-Seok 교신저자