Influence of fiber dispersion on the performance of microfiber reinforced cement composites

Y. Akkaya, S. P. Shah, M. Ghandehari

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

29 Citations (Scopus)

Abstract

High performance fiber reinforced composites are identified by their enhanced elastic behavior, pseudo-strain hardening response and toughened post-peak response. If the composite is adequately reinforced by fibers, the bridging action will transfer the load and multiple cracking will occur. This study investigates the effect of dispersion of fibers on the multiple cracking behavior of fiber reinforced composites. Electronic Speckle Pattern Interferometry technique is used to record the location of crack initiation, sequence of the multiple cracking and corresponding cracking stresses. Microstructural parameters at each crack location are statistically quantified by the theory of point processes. The size of the fiber free areas and fiber clumping are calculated at the crack cross-sections. By using Linear Elastic Fracture Mechanics, fracture toughness of the matrix is calculated. A strong relation between the cracking stress and the fiber free areas in the composite is observed. It is shown that the toughness of the composite depends on the fiber clumping at the first crack cross-section.

Original languageEnglish
Title of host publicationInnovations in Fiber-Reinforced Concrete for Value
EditorsN. Banthia, M. Criswell, P. Tatnall, K. Folliard
PublisherAmerican Concrete Institute
Pages1-18
Number of pages18
ISBN (Electronic)9780870311260
Publication statusPublished - 1 Oct 2003

Publication series

NameAmerican Concrete Institute, ACI Special Publication
VolumeSP-216
ISSN (Print)0193-2527

Bibliographical note

Publisher Copyright:
© 2003 American Concrete Institute. All rights reserved.

Keywords

  • Extrusion
  • Fiber clumping
  • Fiber dispersion
  • Fiber-reinforced concrete
  • Laser interferometry
  • Multiple cracking

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