High-strength high-ductility Engineered/Strain-Hardening Cementitious Composites (ECC/SHCC) incorporating geopolymer fine aggregates

Ling Yu Xu, Bo Tao Huang, Victor C. Li, Jian Guo Dai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

In this study, Engineered/Strain-Hardening Cementitious Composites (ECC/SHCC) incorporating geopolymer fine aggregates were successfully developed with high strength and high ductility. A multi-scale investigation was conducted to gain an in-depth understanding of the microstructure and ductility enhancement mechanism of geopolymer aggregate ECC (GPA-ECC). The use of geopolymer fine aggregates enabled the high-strength ECC to achieve higher tensile ductility and finer crack width compared to existing ones with similar compressive strength in the literature. It was found that the GPA reacted with the cementitious matrix, and the width of the GPA/matrix interfacial transition zone (ITZ) was larger than that of the silica sand/matrix ITZ. Moreover, the GPA achieved a strong bond with the cementitious matrix and could behave as “additional flaws” in high-strength matrix, resulting in saturated multiple cracking and excellent tensile ductility of ECC. This study provides a new avenue for developing high-performance fiber-reinforced cementitious composites based on artificial geopolymer aggregates.

Original languageEnglish
Article number104296
JournalCement and Concrete Composites
Volume125
DOIs
Publication statusPublished - Jan 2022

Keywords

  • Alkali activation
  • Artificial fine aggregates
  • Ductility
  • Engineered cementitious composites (ECC)
  • Geopolymer
  • Strain-hardening cementitious composites (SHCC)

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

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