International Session (Concrete Engineering)

[CS2-43] EFFECT OF EXTERNAL LOAD AND TEMPERATURE CHANGE ON DELAMINATION BEHAVIOR AND INTERNAL CRACK DEVELOPMENT

〇LINGYU SU¹, Hikaru Nakamura¹, Naoki Oshima¹, Taito Miura¹ (1.Nagoya University)

Keywords:Delamination, Internal crack, Thermal cycle, External load

The crack opening behavior of internal crack during loading and temperature change, which resulted in concrete delamination, was clarified. A test method using water to create thermal cycles on the concrete surface was developed to investigate crack opening and closing behavior due to temperature change. It was observed that the damage of internal cracks caused by small temperature change has the same level of influence on concrete delamination behavior as load action.