GFRP reinforcement | Corrosion-free glass fibre…

A corrosion-free alternative to steel

GRP reinforcement

GRP reinforcement bars and GRP mesh panels are a lightweight and sustainable alternative to steel reinforcement.

They are characterised by ease of handling and processing, as well as a low concrete cover. The flexibility of the mesh mats allows for the reinforcement of curved surfaces. When plastering walls and ceilings, this improves the adhesion of the plaster to the substrate, reduces material usage and minimises cracking. Resistance to de-icing salt reduces maintenance and repair costs.

Comparison of steel and GRP reinforcement

Characteristics	Steel reinforcement	GRP reinforcement
Material	Steel	GRP
Tensile strength, MPa	360–390	approx. 1,000
Modulus of elasticity, MPa	200,000	45,000
Elongation at break, %	25	2.2
Linear coefficient of thermal expansion, 10⁻⁶/K	13–15	9–12
Density, kg/dm³	7	1.9
Length	6–12 m	6 m or as required
Corrosion and chemical resistance	No	Yes
Thermal conductivity	Yes	No
Dielectric	no	yes
Transparent to light	no	yes
Resistance to electromagnetic fields	no	yes
Expected service life	30 years	100 years
Diameter Ø		4, 6, 8, 10, 12, 14, 16, 20 mm

Mechanical properties of GRP bars for concrete reinforcement

Properties may vary depending on the diameter. The material properties are based on typical values and must be verified by the end user depending on the intended application. The bars do not have general building approval.

Profile	Helically wound rod
Matrix	Epoxy
Reinforcing fibres	ECR glass fibre
Diameter, mm	4, 6, 8, 10, 12, 14, … max. 40
Standard lengths, mm	6000
Custom lengths	available on request
Colour	natural/black
Tensile strength, MPa	1200
Modulus of elasticity, GPa	60
Max. elongation, %	2.2
Density, kg/dm³	2.1
Barcol hardness	>60
Coefficient of thermal expansion, 1/K	12×10⁻⁶
Electrical resistivity, ohms/cm	10E10–10E15
Surface resistivity, ohms	10E10–10E13
Dielectric strength, kV/mm	5
Creep current resistance, CTI	KC 600
Dielectric constant	<5
Dissipation factor	0.01
Thermal conductivity, W/m*K	0.4
Specific heat capacity, kJ/kg*K	1.0–0.6
Max. continuous operating temperature °C	-100 / +155
Thermal class	F
Water absorption, %	<0.15
Softening temperature (Martens) °C	200
Glow resistance	2b DIN 4102 B
Fire behaviour
Corrosion caused by flue gases pH	6.1
Combustion energy, J/g	7639

Extraction test
C16/20 concrete – 100x100x100 mm cube
6 mm bar – pull-out force 16 kN
8 mm bar – pull-out force 35 kN

Available sizes

maximum width: 1.8 m

	2	2.5	3	4	6	8
Stitch size
50 x 50 mm	X	X	X	X
50 x 100 mm	X	X	X	X	X	X
100 x 100 mm			X	X	X
100 x 150 mm			X	X	X	X
100 x 200 mm				X	X	X
150 x 150 mm				X	X	X
200 x 200 mm				X	X	X

GFRP Grid Mats Performance

Modulus of elasticity GPa 40
Tensile strength MPa 200

Sizes	Bars/m	Minimum tensile strength of mesh – N/m
Bar diameter mm		2	2.5	3	4	6	8
50 x 50 mm		212,560	19,625	28,260	50,240	113,040	200,960
50 x 100 mm	10	6,280	9,813	14,130	25,120	56,520	100,480
100 x 100	10	6,280	9,813	14,130	25,120	56,520	100,480
100 x 150 mm	7	4,396	6,869	9,891	17,584	39,564	70,336
100 x 200 mm	5	3,140	4,906	7,065	12,560	28,260	50,240
150 x 150 mm	7	4,396	6,869	9,891	17,584	39,564	70,336
200 x 200 mm	5	3,140	4,906	7,065	12,560	28,260	50,240

Solutions for the construction industry

When steel reaches its limits, the more environmentally friendly glass-fibre reinforcement is used. Thanks to its durability and high resistance to external influences, the need for renovation work and the occurrence of cracks in concrete are significantly reduced. Fibrolux offers a glass-fibre-based reinforcement system that fully meets the requirements for sustainability, durability, efficiency and cost savings. As a structural material, steel has been a success story since the Industrial Revolution. However, steel also has disadvantages, which are offset by GRP reinforcement.

GRP reinforcement mats have a number of unbeatable advantages over steel, which have made them indispensable for a wide range of applications in construction projects for several years now:

The rust-free and lightweight alternative to reinforcing steel

Whether in maritime applications, tunnel construction or for long-lasting infrastructure: GRP reinforcement bars combine maximum tensile strength with complete resistance to corrosion, ease of installation and a long service life.

High tensile strength

Fibreglass-reinforced plastic (FRP) reinforcement offers greater tensile strength than conventional reinforcing steel for the same cross-section.

Durability and cost-effectiveness

Avoiding corrosion-related refurbishment work can reduce the long-term life-cycle costs of a building.

Electrically insulating

Glass-fibre-reinforced plastic does not conduct electricity. This prevents leakage currents and is advantageous for structures located near railway tracks, induction loops or transformer stations.

Do you have any questions about our products or the various ways they can be used? We’d be happy to advise you!

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