Title:
UHPC Fiber Orientation and Volume using Electrochemical Impedance Spectroscopy: A Simulation Study
Author(s):
Ettini
Publication:
Web Session
Volume:
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
3/23/2024
Abstract:
Fiber orientation in ultra-high performance concrete (UHPC) is a critical factor that relates to both material- and structural-level behavior. Many techniques have been studied to quantify fiber orientation including but not limited to computer vision-aided image analysis, computerized tomography (CT) scanning, and electromagnetic methods. This presentation will discuss a pilot study on the application of electrochemical impedance spectroscopy (EIS) to determine fiber orientation and fiber volume in UHPC-class materials. A series of prismatic beam samples were created with different fiber volume fractions. Different casting methods were employed to create random and aligned fiber orientations. Specimens were scanned using EIS and subsequently subjected to 4-point bending to assess tensile resistance. Additionally, a limited parametric study was completed using a commercially available multiphysics modeling platform. This aimed to determine how different parameters such as fiber orientation and fiber volume fraction influence the impedance response. The presentation will provide an overview of this work and its preliminary findings.