Monitoring fiber dispersion in fiber-reinforced cementitious materials: Comparison of AC-impedance spectroscopy and image analysis

Nilufer Ozyurt, Leta Y. Woo, Thomas O Mason, Surendra P. Shah

Research output: Contribution to journalArticle

65 Citations (Scopus)


Fiber dispersion is an important factor that affects both the fresh and hardened state properties of cement-based materials. While there are some well-studied, fundamental methods for monitoring fiber dispersion, most of them are destructive and time-consuming. Previous work has shown that AC-impedance spectroscopy (AC-IS) can be used as an effective tool for nondestructively monitoring fiber dispersion in both the fresh and hardened states of fiber-reinforced cementitious (FRC) materials. AC-IS was found to be sensitive to different dispersion phenomena. In this study, fiber clumping and orientation were studied using image analysis to verify the AC-IS measurements. The results of the two methods agreed well within experimental uncertainty, suggesting that AC-IS can be used as a nondestructive and rapid method for monitoring fiber dispersion in cementitious materials.

Original languageEnglish
Pages (from-to)340-347
Number of pages8
JournalACI Materials Journal
Issue number5
Publication statusPublished - Sep 2006



  • Fiber-reinforced cementitious materials
  • Fibers
  • Testing

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

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