Welcome to r/ConChip — a home for synthetic fiber reinforced concrete

Hi everyone, and welcome to r/ConChip!

This is a community for anyone working with — or curious about — synthetic macro fibers and fiber reinforced concrete (FRC). Whether you're designing tunnel segments, spraying shotcrete, pouring industrial floors, or running beam tests in a lab, you'll find something useful here.

Who should join
- Structural / civil engineers
- Contractors and shotcrete crews
- Precast producers
- Researchers and lab technicians
- Anyone dealing with EN 14651, ASTM C1609, or fiber dosage on site

What we talk about
- Macro synthetic fiber vs steel fiber — performance, cost, handling
- Shotcrete, tunnel segments, precast, industrial flooring, UHPC
- Testing standards: EN 14651, EN 14488, ASTM C1609/C1550
- Mix design, dosage, and real job-site experience
- Case studies and project photos
- Industry news and new technology

A few ground rules

1. Be professional and respectful — we're all here to learn.
2. No spam, no hard selling. Product mentions are fine only when they genuinely answer a technical question.
3. Share knowledge, not brochures. Data and site experience beat marketing claims.
4. Please post in English so everyone can follow.

What's next
I'll be posting one technical piece every day — starting tomorrow with a comparison of macro synthetic fiber vs steel fiber across 7 practical dimensions. If there's a topic you'd like covered, just ask.

Now it's your turn: introduce yourself in the comments — what do you do, where are you from, and which application are you most interested in? Let's get this community going.

— Mod team