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


Ozyurt N., Woo L. Y. , Mason T. O. , Shah S. R.

ACI MATERIALS JOURNAL, cilt.103, ss.340-347, 2006 (SCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 103 Konu: 5
  • Basım Tarihi: 2006
  • Dergi Adı: ACI MATERIALS JOURNAL
  • Sayfa Sayıları: ss.340-347

Özet

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 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.