FRP roll - Fiber-reinforced polymer substance to wrap beams,
Fiber-Reinforced Polymer (FRP) reinforcing can be made from various types of fibers such as glass (GFRP), basalt (BFRP) or carbon (CFRP). A surface treatment is typically provided that facilitates a bond between the reinforcing and the concrete.

Beneficial characteristics of FRP reinforcing include: (taken fromĀ FDOT)

  • It is highly resistant to chloride ion and chemical attack
  • Its tensile strength is greater than that of steel yet it weighs only one quarter as much
  • It is transparent to magnetic fields and radar frequencies
  • GFRP has low electrical and thermal conductivity

FRP composite materials are comprised of high strength continuous fibers, such as glass, carbon, or steel wires, embedded in a polymer matrix. The fibers provide the main reinforcing elements while the polymer matrix (epoxy resins) acts as a binder, protects the fibers, and transfers loads to and between the fibers.

FRP composites can be manufactured on site using the wet lay-up process in which a dry fabric, made of carbon or glass, is impregnated with epoxy and bonded to prepared concrete substrate. Once cured, the FRP becomes an integral part of the structural element, acting as an externally bonded reinforcing system. FRP composites can also be prefabricated in a manufacturing facility in which the material is pultruded to create different shapes that can be used for strengthening applications, such as rods, bars and plates. (from Structure Magazine)

Usage Restrictions / Parameters

GFRP, and/or CFRP reinforcing bars may be used in the following concrete components when approved by the SSDE:

  • Approach Slabs
  • Bridge Decks and Bridge Deck overlays
  • Cast-in-Place Flat Slab Superstructures
  • Pile Bent Caps not in direct contact with water
  • Pier Columns and Caps not in direct contact with water
  • Retaining Walls, Noise Walls, Perimeter Walls
  • Drainage Structures
  • Beam Strengthening
  • Seismic Glass Fiber Reinforcement
  • Plank Reinforcement
  • Penetration Reinforcement