Quantitative characterization of anisotropic properties of the interfacial transition zone (ITZ)between microfiber and cement paste

Shan He, Zhong Li, En Hua Yang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

A new approach to characterize ITZ between microfiber and cement matrix is reported. Results show that microstructure of hydrated cement paste is highly modified in the vicinity of microfibers, with higher porosity and less anhydrous cement. ITZ can extend up to 100 μm from the interface into the matrix. The larger extent of ITZ suggests that perturbation due to inclusion of microfibers to packing of cement grains is severer than that due to inclusion of aggregates. Furthermore, ITZ between microfiber and cement matrix is highly heterogeneous along its axial direction. Existing ITZ analysis methods performed on 2-D cross-sectional plane intersecting with fiber axis thus can lead to errors and uncertainties. Mechanical properties of ITZ between microfiber and cement matrix are anisotropic. Stiffness and ductility of ITZ in the radial direction are 31% and 28% higher than that in the tangential direction, respectively.

Original languageEnglish
Pages (from-to)136-146
Number of pages11
JournalCement and Concrete Research
Volume122
DOIs
Publication statusPublished - Aug 2019
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2019 Elsevier Ltd

ASJC Scopus Subject Areas

  • Building and Construction
  • General Materials Science

Keywords

  • Characterization (B)
  • Fiber reinforcement (E)
  • Interfacial transition zone (B)
  • Microstructure (B)
  • Nanoindentation

Fingerprint

Dive into the research topics of 'Quantitative characterization of anisotropic properties of the interfacial transition zone (ITZ)between microfiber and cement paste'. Together they form a unique fingerprint.

Cite this