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

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 mu m). These characteristics were realized by combined use of polyethylene and steel fibers in a dense matrix. Two new material indices (f'cftet index and f'cftet/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.

Automated summary

In this study, ultra-high-strength ECC (UHS-ECC) with a compressive strength over 210 MPa was successfully developed for the first time, showing excellent tensile strain capacity and fine crack width through the combined use of polyethylene and steel fibers in a dense matrix. Two new material indices were proposed to assess the overall performance of UHS-ECC. The developed UHS-ECC records the highest compressive strength and the best overall performance compared with existing high-strength ECC.