Fibers create a 3D support system,effectively inhibiting the initiation and propagation of micro-cracks,significantly improving post-crack residual strength and ductility.Greatly enhances toughness,allowing the material to absorb more energy upon failure,exhibiting a"yielding"behavior rather than brittle fracture.Improves resistance to impact,fatigue,and blast loads.Synthetic fibers primarily control early-age plastic shrinkage cracking,while steel fibers markedly enhance hardened-state mechanical properties.
Classified by fiber material:Steel FRC(SFRC),Synthetic FRC(SNFRC),etc.Key specifications include fiber type,aspect ratio,dosage,and crucial toughness indices(e.g.,residual strength factors,equivalent flexural strength ratio).Performance requirements and fiber dosage vary significantly depending on the application.
SFRC:Industrial floors,warehouse slabs,bridge decks,tunnel linings,military protective structures,precast segments.PP FRC:Pavements,parking lots,exterior rendering(for plastic shrinkage control).Adding steel fibers to shotcrete can replace wire mesh,improving support capacity and application efficiency.
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