Steel Rebar vs GFRP Webinar: Why Steel Still Reigns Supreme for Reinforced Concrete
July 17, 2025; 12:00 PM – 1:00 PM CDT
Salem Faza, CMC
This presentation outlines the history of ASTM specifications for steel and GFRP bars for concrete reinforcement. A review of the mechanical properties of steel vs GFRP rebars will be presented along with the design codes and tools that are available for engineers. Extensive design examples utilizing the ACI and AASHTO codes will be presented along with a thorough evaluation of the carbon footprint (EPDs) for all the reinforcing products.
Reinforcing steel, commonly known as rebar, plays a crucial role in reinforced concrete structures. The first ASTM specification for deformed reinforcing bars was introduced in 1910. Over the past 50 years, advancements in corrosion resistant rebars were essential for extending the service life of concrete structures, especially in marine environments, bridges and areas exposed to de-icing salts. The need for corrosion resistant steels lead to the development of ASTM A767 (Galvanized), ASTM A755 (epoxy coated), ASTM A955 (stainless steel), ASTM A1035 (Low-Carbon Chromium) and ASTM A1094 (Continuous Hot Dipped Galvanized).
GFRP rebar is an alternative to traditional steel reinforcement. GFRP is made from high-strength glass fibers embedded in a polymer resin matrix. The fibers provide tensile strength while the resin matrix protects against environmental damage. GFRP rebars claim to be non-corrosive due to the fact that it does not contain any steel products and are produced in accordance to ASTM D7957 and ASTM D8505.
Following this webinar, the participants will be able to:
• Understand the major specifications for corrosion resistant steels as well as non-metallic reinforcement.
• Evaluate the availability and the difference in mechanical properties between the different types of reinforcement.
• Recognize the benefits of using state-of-the-art corrosion resistant steel vs the limitations of GFRP.
• Identify potential applications for all types of corrosion-resistant products. Attendees will receive one hour of PDH credit.