FRC - Rheology, fiber dispersion, and mechanical properties

Nilufer Ozyurt*, Thomas O Mason, Surendra P Shah

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Synopsis: The effects of fresh state properties on the fiber dispersion characteristics of fiber-reinforced composites (FRCs) were studied by quantifying fiber segregation. Fresh state properties of concrete mixes were varied using different combinations of a plasticizing agent and viscosity modifier. A self-designed parallel-plate rheometer was used to obtain rheological parameters. Vibration was applied to the specimens and vibration times were varied to understand the effects of vibration on fiber segregation. An electrical characterization method, alternating current-impedance spectroscopy (AC-IS), was used to quantify fiber segregation in specimens. The relationship between fresh state properties and fiber segregation was evaluated.

Original languageEnglish (US)
Title of host publicationFiber-Reinforced Concrete in Practice - Papers Presented at the ACI Spring 2006 and Fall 2006 Conventions
Number of pages10
Edition268 SP
StatePublished - Dec 1 2006
EventACI Spring 2006 and Fall 2006 Conventions - Denver, CO, United States
Duration: Nov 5 2009Nov 9 2009


OtherACI Spring 2006 and Fall 2006 Conventions
Country/TerritoryUnited States
CityDenver, CO


  • AC-impedance spectroscopy
  • Fiber dispersion
  • Rheology
  • Viscosity-modifying agent

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)


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