Earticle

초록

영어

The study identified the efficiency of the new technology, No.618 and No.660, which are the crack control engineering of the mat concrete, developed by the research team, by applying both in the field at the same time. The efficiency is attained by analysing the overall mat concrete properties and the hydration heat temperature hysteretic characteristics First of all, as the fresh concrete characteristics, slump, air content, chloride content and concrete temperature satisfied all the target values. The compressive strength of the hardened concrete at the age of 7days and 28days met the nominal strength required by the orderers. From the measurement of the temperature hysteretic characteristics, the temperature gap between the center and the surface of A and B sector, which can be caused by the casting time difference at the initial time, was minimal. The maximum temperature of the middle part of A sector was 59.6℃ and 55.6℃ for the surface. In the B sector, 54.6℃ and 48.9℃ respectively for the middle part and the surface. So there were no cracks caused by hydration heat in the sector A and B. Both, A sector and B sector generate the hydration heat in the upper and lower part of the concrete at the age of 8~9 hours. But the cracks did not occur because Double Bubble Sheets insulated the surface and reduced the temperature gap between the middle part and the surface. Finally the study confirmed that for the hydration heat crack control of the mat concrete, new technology No.618 and No.660 are recommended to be used at the same time.

목차

Abstract
 1. 서론
 2. 매트 기초콘크리트의 균열제어 공법 및 시공방법
  2.1 신기술 618호의 메커니즘
  2.2 신기술 660호의 메커니즘
  2.3 시공방법
 3. 현장적용 계획 및 실험방법
  3.1 공사개요
  3.2 현장적용 시공의 실험계획
  3.3 온도이력 측정 부위 및 방법
 4. 현장적용 결과 및 분석
  4.1 굳지 않은 콘크리트
  4.2 온도이력 특성
 5. 결론
 참고문헌

저자

• 김태청 [ Kim, Tae-Cheong | (주) 선ENG 건설기술연구소 연구원, 공학박사 ]
• 김종 [ Kim, Jong | (주) 선ENG 건설기술연구소 연구원, 공학박사 ]
• 연규원 [ Yeon, Kyu-Won | (주) 선ENG 건설기술연구소 책임연구원, 공학박사 ]
• 전충근 [ Jeon, Chung-Keun | (주) 선ENG 건설기술연구소 연구소장, 공학박사 ]
• 신동안 [ Shin, Dong-An | (주) 선ENG 사장, 공학박사 ]
• 오선교 [ Oh, Seon-Kyo | (주) 선ENG 회장, 공학박사 ]

참고문헌