WHAT IS FRP REBAR?

In this series, we are going to cover some frequently asked questions we hear when we introduce our product, GatorBar, to anyone new. The first and most basic question is the obvious one. What is FRP rebar? While it may surprise you FRP rebar has been with great success for over thirty years, and is in over 350 bridges across Canada and 90 in the United States.

So let’s answer the question: FRP stands for Fiber Reinforced Polymer. FRP rebar is comprised of two elements; a fiber (usually carbon, glass, aramid, or basalt) and a matrix resin (polyester, epoxy, or vinyl ester). The role of the matrix resin is to hold together, protect, and transfer the load between the fibers.

FRP rebar FRP rebar

So how does the end product, FRP rebar, differ from steel rebar? There are two big differences someone will notice immediately when comparing the two side by side.

  • First, FRP is much lighter than steel, up to 7 times to be exact!
  • The second is that FRP rebar is much less stiff, or technically speaking, FRP has a modulus of elasticity that is 5 times less than that of steel. To learn about how the lower modulus of elasticity can be beneficial in slab on grade applications, download our whitepaper here.

But the difference goes further than that:

  • FRP rebar is corrosion resistant, where steel will eventually rust and crack the concrete it’s supposed to reinforce. This leads to structural life that is up to 2 times longer when FRP rebar is used!
  • FRP has a greater tensile strength than steel
  • FRP rebar is thermally and electrically non-conductive

Now you know the basics. We are here to answer any additional questions you may have, just contact us!

Costello Construction

Costello Construction

Kauai, HI

"It [GatorBar] is so easy to work with it feels like we are cheating! We have always used a #4 steel rebar grid in warehouse slabs to add structural integrity, but no matter how hard you try, 6x6x10/10 wire mesh always ends up on the bottom of the slab. There is never enough time to pull it up, and even if you Dobie it up, the steel bends down when you step on it. In the end, it does not add structural strength to the slab. GatorBar springs back, staying centered in the slab."