Engineered/strain-hardening cementitious composites (ECC/SHCC) with an ultra-high compressive strength over 210 MPa. (August 2021)

• Record Type: Journal Article
• Authors: Huang, Bo-Tao; Weng, Ke-Fan; Zhu, Ji-Xiang; Xiang, Yu; Dai, Jian-Guo; Li, Victor C.
• Is Part Of: Composites communications. Volume 26(2021)
• Publication Date: 2021-08
• Subjects: Engineered cementitious composites (ECC) -- Strain-hardening cementitious composites (SHCC) -- Ultra-high performance concrete (UHPC) -- Ultra-high strength -- Hybrid fiber reinforcement
• DOI: 10.1016/j.coco.2021.100775
• Languages: English
• ISSNs: 2452-2139

Abstract

Abstract: Engineered/Strain-Hardening Cementitious Composites (ECC/SHCC) are fiber-reinforced cement-based materials with tensile strain-hardening and multiple-cracking characteristics. In this study, ultra-high-strength ECC (UHS-ECC) with a compressive strength over 210 MPa was successfully developed for the first time. The developed UHS-ECC exhibited excellent tensile strain capacity (5.2%), and fine crack width (72 μm). These characteristics were realized by combined use of polyethylene and steel fibers in a dense matrix. Two new material indices ( f' c f t ε t index and f' c f t ε t / w index) were proposed to assess the overall performance of UHS-ECC. Compared with existing high-strength ECC, the developed UHS-ECC records the highest compressive strength and the best overall performance. The findings of this study provide useful knowledge for future design and applications of UHS-ECC. Graphical abstract: Image 1 Highlights: ECC with compressive strength of 211 MPa, tensile strain capacity of 5.2%, and average crack width of 72 μm was developed. Among existing high-strength ECC, the developed ECC showed the highest compressive strength and the best overall performance. Two new material indices ( f' c f t ε t index and f' c f t ε t / w index) were proposed to evaluate the overall performance of ECC.