TL;DR
Fiber reinforcement is the addition of short synthetic, glass, or steel fibers to a concrete mix — commonly polypropylene micro-fibers dosed around 1 to 1.5 pounds per cubic yard — distributing millions of tiny tendons that restrain plastic shrinkage cracking while the slab is green. Micro-fibers do not replace structural steel; macro-synthetic and steel fibers at higher doses can substitute for wire mesh in slabs on grade.
What it means
Fiber reinforcement is the addition of short synthetic, glass, or steel fibers to a concrete mix — commonly polypropylene micro-fibers dosed around 1 to 1.5 pounds per cubic yard — distributing millions of tiny tendons that restrain plastic shrinkage cracking while the slab is green. Micro-fibers do not replace structural steel; macro-synthetic and steel fibers at higher doses can substitute for wire mesh in slabs on grade. The giveaway on a finished surface is occasional fiber fuzz, which UV exposure and traffic wear away.
Where it sits in the glossary
Fiber reinforcement is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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