In experimental results, the prediction equation for 28 day-strength of GGBF slag concrete could be produced through the linear regression analysis of early strength and 28 day-strength. In order to acquire the reliability, all mixture were repeated as 3 times and each mixture order was carried out by random sampling. The prediction equation for 28 day-strength of GGBF slag concrete by 1 day strength won the good reliability.

• 김용직(대우건설기술연구원 토목연구팀, 공학박사) | Kim, Yong Jic 교신저자
• 조준희(대우건설기술연구원 토목연구팀) | Jo, Jun Hee
• 김영진(대우건설기술연구원 부원장, 공학박사) | Kim, Young Jin
• 최연왕(세명대학교 토목공학과 교수, 공학박사) | Choi, Yun Wang