Analysis of Fiber Content and Orientation in Prefabricated Slab Elements Made of UHPFRC: Non-Destructive, Destructive, and CT Scanning Methods
Petr Konrád, Karel Künzel, Přemysl Kheml, Michal Mára, Kristýna Carrera, Libor Beránek, Lucie Hlavůňková, Jindřich Fornůsek, Petr Konvalinka, Radoslav Sovják
TL;DR
This study introduces a non-destructive method to analyze fiber content and orientation in concrete slabs, improving quality control in prefabrication.
Contribution
A novel non-destructive testing method using a coil’s quality factor for fiber analysis in UHPFRC slabs is introduced and validated.
Findings
The coil’s quality factor correlates well with fiber distribution and orientation in UHPFRC slabs.
The method reliably detects material defects and predicts mechanical properties of the slabs.
Results were validated using destructive tests and CT scanning, confirming the method’s accuracy.
Abstract
This study investigates fiber content and orientation in prefabricated slab elements made of ultra-high-performance fiber-reinforced concrete (UHPFRC), using novel non-destructive measurement using a coil’s quality factor, where the coil is put to one side of the specimen only. This allows the analysis of slab specimens of arbitrary size. That then allows an accurate quality control of elements made in the prefabrication industry. This study presents an experimental campaign designed to evaluate the non-destructive principle’s accuracy and practical feasibility. Twenty-five large slab specimens were made in an industrial prefabrication plant using various casting methods to introduce different flow-induced fiber parameters. The slabs were subjected to this non-destructive testing, then destructive bending tests and CT scanning to tie the results together and validate the non-destructive…
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Taxonomy
TopicsInnovative concrete reinforcement materials · Structural Behavior of Reinforced Concrete · Smart Materials for Construction