AR glassfiber roving and AR chopped strand are widely used as reinforcement in the GRC production process.

(1) Alkali-resistant glassfibre contain a high percentage of zirconia (ZrO2), which enhances its resistance to alkali in cement composites.Zirconia is what makes the glassfiber alkali resistant. The higher the zirconia content the better the resistance to alkali attack. These AR fibers also have excellent acid resistance.

(2) AR chopped glass fibers are mixed in to GFRC concrete mixture to greatly increase the flexible strength, and reduce shrinkage.

AR glassfiber with high zirconia content(usually 14.5% min.) is essential for GRC production.16.5% ZrO2 content glassfiber is required for the GRC making process in Europe.