NOW E&S

New Material Division

Glass (Carbon) Fiber Reinforced Polymer Rebar (GFRP/CFRP Rebar)

The next-generation construction material produced in combination of the molding and engineering technologies of the glass (carbon) fiber material with rust-resistance, high strength, and low weight, which makes it possible to expand the lifespan of buildings and structures and to improve quality and productivity.

Glass Fiber Reinforced Polymer (GFRP) Rebar Product

Glass Fiber Reinforced Polymer (GFRP) Rebar has such advantages as more strength (three times) and lower weight (1/9) than steel based rebar, corrosion resistance, low maintenance cost, and lifecycle (over 80 years) cost reduction. Therefore, with the material, it is possible to prevent deterioration of concrete structures and expand their lifespan. As a new material product, GFRP Rebar has actively been used for civil engineering, construction, bridges, tunnels, roads, railways, wind power and offshore structures, and others in advanced countries since the 2000s.

(GFRP) Rebar (comparison between GFRP Rebar and steel (Fe) Rebar)

Metal Rebar (Fe) D13mm	GFRP Rebar D10mm
Rust and corrosion, vulnerable to salt	Excellent corrosion-resistance and chemical-resistance
Low tensile strength	About three times stronger tensile strength than steel rebar
Heavy unit weight (995g/m)	Light weight (150g/m, about 15% of the weight of steel rebar)
High construction cost (trailer transportation, etc.)	Construction cost saving (11t truck transportation, work efficiency improvement)
Possible fluctuation and rise of rebar price	More than 25% lower cost than that of rebar (flexible depending on the market price of rebar
Expansion and contraction as thermal conductor (heat conductivity: 46W/m℃) Causing damage by transferring fire upstairs in case of building fire	Non-conductor without thermal conductivity (heat conductivity: 0.35W/m℃) No heat transfer due to insulation, and safe
Vibration delivery, and vulnerable to earthquake	Shock absorption, strong for earthquake, and reduction in noise between floors

GFRP G-Bar Production Line

G-Bar Production Line

Features and Advantages of G-Bar

Product spec.the products whose outside diameter ranges from 7mm to 32mm (discussion for special specifications)
Applied technologypatented technology based on pultrusion
Material propertyHigh-strength and low-weight product compared to steel rebar, due to glass fiber complex material
Product featuresNo corrosion, high tensile strength, and improved quality and lifespan of buildings
Applied areasCivil engineering, buildings, offshore structures, roads, railways, bridges and tunnel construction, etc.

Mechanical Properties of G-Bar

Type	Unit	G10	G13	G16
Complex Material	Glass long fiber + Unsaturated polyester resin
Tensile Strength	MPa	800 ~ 1,300
Tensile Stiffness	GPa	49	50	49
Max. Load of Tension	kN	88	151	245
Flexural Strength	MPa	912	791	645
Flexural Stiffness	GPa	41	44	29
Weight	g/m	150	250	400
Thermal Expansion Coefficient	xE-6/℃	6.95
Fiber Volume Rate	%	60.7
Porosity	%	0.8
Fiber Density	g/cm³	2.54
Resin Density	g/cm³	1.2
Flexural Max. Load	N	871.2	2481	4176.2