As an alternative to conventional explosive methods for demolition of concrete structures and rocks, the use of non-explosive demolition agents can be considered to reduce noise, vibration, and dust emissions during the demolition process. In this study, we conduct finite element analysis for crack initiation and propagation caused by the expansion of non-explosive demolition agents in square concrete structures. The predicted crack patterns are compared with the experimental results in the literature. The minimum values of the required expansion pressure of non-explosive demolition agents are also estimated, which depend upon the arrangement of non-explosive demolition agents and empty holes. Furthermore, we investigate the effect of empty holes on the fragmentation of concrete structures, and discuss the effective arrangement of non-explosive demolition agents and empty holes for fragmentation improvement.

• 조황기(한국해양대학교 기계공학과) | Hwangki Cho (Department of Civil and Environmental Engineering, KAIST, Daejeon, 34141, Korea)
• 남윤민(한국해양대학교 기계공학과) | Yunmin Nam (Department of Civil and Environmental Engineering, KAIST, Daejeon, 34141, Korea)
• 김경진(한국해양대학교 토목환경공학과) | Kyeongjin Kim (Department of Civil and Environmental Engineering, Graduate School, Korea Maritime and Ocean Univ., Busan, 49112, Korea)
• 이재하(한국해양대학교 건설공학과) | Jaeha Lee (Department of Civil Engineering, College of Engineering, Korea Maritime and Ocean Univ., Busan, 49112, Korea)
• 손동우(한국해양대학교 기계공학부) | Dongwoo Sohn (Division of Mechanical Engineering, College of Engineering, Korea Maritime and Ocean Univ., Busan, 49112, Korea) Corresponding author