GFRC Methods (Glass Fiber Reinforced Concrete) Our customers often have questions about which method to use. • Spray up or self-consolidating facecoat: Use on 3D pieces or on flat surfaces with surface exposure (acid etch, sandblast). • Direct cast no facecoat: Use when there will not be surface exposure (light sanding, form liner). All powder High Performance Admixtures and Supplies: www.trinic.us Trinic, LLC – [email protected] – 800-475-1975 #precast #trinic #uhpc #gfrc | Trinic LLC.

Direct Cast Glass Fiber Reinforced Concrete Direct cast GFRC is defined as casting GFRC with no facecoat (backcoat with fiber only) directly on to the form. A self-consolidating mix that does not require vibration is used. The result is a finished casting with minimal imperfection, excellent strength and no fiber showing. Making flawless direct castings. The mix: • 50% Cementitious – 90% Portland, 10% Trinic White Silica Fume • 50% Sand – 40-50 mesh works fine; you can blend in some smaller size

Glass Fiber Reinforced Concrete – Advance Techniques – Self Consolidating Face Coat / Backcoat There are situations where you will need to spray a facecoat and hand lay a backcoat, that said if you don’t have to don’t. One technique made possible by Trinic’s GFRC Admix is to self-consolidate a face coat, work it up the edges using a chip brush, then self-consolidate a back coat. There has been some confusion within the GFRC industry about the flexural strength of self-consolidated backcoats. I’v