首页 | 本学科首页   官方微博 | 高级检索  
     


Tensile and fiber dispersion performance of ECC (engineered cementitious composites) produced with ground granulated blast furnace slag
Authors:Jin-Keun Kim  Gee Joo Ha
Affiliation:a Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), 373-1, Guseong-dong, Yuseong-gu, Daejeon, 305-701, Korea
b Department of Architectural Engineering, Kyungil University, 33, Buho-ri, Hayang-up, Gyeongsan-si, Gyeongbuk, 712-702, Korea
c Department of Civil Engineering, Chungnam National University, 220, Gung-dong, Yuseong-gu, Daejeon, 305-764, Korea
Abstract: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.
Keywords:ECC  Ground granulated blast furnace slag  Micromechanics  Fiber dispersion  Tensile strain capacity
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号