Earticle

초록

영어

An Engineered Cementitious Composite (ECC) produced with ground granulated blast furnace slag was developed for the purpose of achieving moderately high composite strength while maintaining high ductility, represented by strain-hardening behavior in uniaxial tension. In the material development, single fiber pullout tests and matrix fracture tests were performed, followed by micromechanical analyses to properly select the range of mixture proportion. Subsequent direct tensile tests were employed to assess the strain-hardening behavior of the composite, which exhibited high ductility and strength with the addition of slag. High ductility is most likely due to enhanced workability and fiber dispersion performance which is attributed to the oxidized grain surface of slag, as verified by fiber dispersion tests. These results suggest that, within the limited slag dosage employed in the present study, the contribution of slag to fiber dispersion outweighs the side-effect of decreased potential for saturated multiple cracking, including a slight increase in matrix fracture toughness and fiber/matrix bond strength.

목차

Abstract
 1. 서론
 2. Slag-ECC의 설계개념 및 고로슬래그 미분말의 적용
  2.1 Slag-ECC의 설계개념
  2.2 고로슬래그 미분말의 적용
 3. 실험계획 및 방법
  3.1 실험재료
 4 실험결과 및 분석
  4.1 섬유인발 실험과 매트릭스 파괴인성 실험
  4.2 섬유가교 해석
  4.3 Slag-ECC 배합의 범위 결정
  4.4 1축 인장 거동
  4.5 섬유분산성
 5. 결론
 참고문헌

저자

• 김정수 [ Kim, Jeong-Su | (주)한화건설 기술연구소, 건축기술연구팀, 선임연구원 ]
• 하기주 [ Ha, Gee-Joo | 경일대학교 교수, 사)건설기술정책연구원 원장, 공학박사 ] Corresponding Author
• 홍건호 [ Hong, Kun-Ho | 경일대학교 대학원, 건축공학과, 박사과정, 사)건설기술정책연구원 선임연구원 ]
• 신종학 [ Shin, Jong-Hark | 경일대학교 건축학부 교수, 공학박사 ]

참고문헌