Fiberglass reinforcing bars for civil engineering are made of alkali-free glass fiber (E-Glass) untwisted roving with less than 1% alkali content or high-tensile glass fiber (S) untwisted roving and resin matrix (epoxy resin, vinyl resin), curing agent and other materials, composite by molding and curing process, referred to as GFRP bars.
Fiber reinforced composites (FRP) in civil engineering applications in the significance of “structural durability problems and in some special working conditions to play its lightweight, high strength, anisotropic characteristics,” combined with the current level of application technology and market conditions, industry experts believe that its application is selective. In the subway shield cutting concrete structure, high-grade highway slopes and tunnel support, resistance to chemical erosion and other fields has shown excellent application performance, more and more accepted by the construction unit.
Application Technology
1. Geotechnical engineering with GFRP anchor support technology
Tunnel, slope and subway projects will involve geotechnical anchoring, anchoring often use high tensile strength steel as anchor rods, GFRP bar in the long-term poor geological conditions have good corrosion resistance, GFRP bar instead of steel anchor rods with no need for corrosion treatment, high tensile strength, light weight and easy to manufacture, transportation and installation advantages, at present, GFRP bar is being increasingly used as anchor rods for geotechnical projects. Currently, GFRP bars are being used more and more as anchor rods in geotechnical engineering.