To examine the in-place strength development of concrete of nuclear containment structures with the wall thickness of 1200 mm, mock-up wall specimens were prepared. For maturity evaluation, the temperature rise in the wall specimens owing to hydration heat of cementitious materials was also measured. The in-place strength of concrete was measured using core specimens collected at different locations of mock-up walls. Test results showed that in-place compressive strength development was 1.5 times higher than the strength measured from the standard cylinders. This indicates the maturity effect is needed to be considered in predicting the compressive strength development of concrete in mass structures.

• 문재성(경기대학교 일반대학원 건축공학과, 박사과정) | Mun, Jae Sung
• 양근혁(경기대학교 플랜트∙건축공학과, 교수) | Yang, Keun Hyeok 교신저자
• 이영호(동원대학교 건축학과, 교수) | Lee, Young Ho