GRP REINFORCEMENTS

Structural elements often have to be rehabilitated or even completely replaced because the steel reinforcement has rusted through and the concrete structure has been destroyed as a result. This applies in particular to components that are exposed to de-icing salt. Corrosion is no longer an issue when GRP reinforcement is used. GRP reinforcement reduces the number of component repairs. GRP reinforcements are mainly used in concrete and polymer concrete parts.

Comparison of steel and GRP reinforcement

Charakteristics	Steel Reinforcement	GRP-Reinforcement
Material	Steel	GRP
Tensile strength, MPa	360-390	1200-1300
E-Modul, MPa	200000	60000
Elongation at break, %	25	2,2
Lin. Thermal expansion coefficient, 10-6/K	13-15	9-12
Density, kg/dm3	7	1,9
Length	6-12m	6m or as required
Corrosion and chemical resistance	no	yes
Thermal conductivity	yes	no
Dielectric	no	yes
Radiolucent	no	yes
Insensitivity to electromagnetic fields	no	yes
Expected service life	30 Years	100 Years
Diameter Ø		4, 6, 8, 10, 12, 14 mm

Mechanical properties of GRP rods for concrete reinforcement

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

Profile	Rod with spiral winding
Matrix	Epoxy
Reinforcing fibres	ECR glass fibre
Diameter, mm	4, 6, 8, 10, 12, 14, … max. 40
Standard lengths, mm	6000
Customised lengths	possible on request
Colour	natural/black
Tensile strength, MPa	1200
E-modulus, GPa	60
max. elongation, %	2,2
Density, kg/dm³	2,1
Barcol hardness	>60
Coefficient of expansion, 1/K	12*10E-6
Specific resistance, Ohm/cm	10E10-10E15
Surface resistivity, Ohm	10E10-10E13
Dielectric strength, kV/mm	5
Creep 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 temperature °C	-100 / +155
Thermal class	F
Water absorption, %	<0,15
Softening temperature(Martens) °C	200
Glow resistance	2b
Fire behaviour	DIN 4102 B
Corrosion of flue gases pH	6,1
Combustion energy, J/g	7639

Extract test
Concrete C16/20 - Cube 100x100x100 mm
Rod 6 mm - pull-out force 16 kN
Rod 8 mm - pull-out force 35 kN

Available sizes

maximum width: 1,8 m

	2	2,5	3	4	6	8
Mesh 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

GRP Grid Mats Performance

E-Modulus GPa 40
Tensile strength MPa 200

Sizes	Rods/m	Minimum tensile strength Mesh - N/m
Rod 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 option of glass-fibre reinforcement is used. Thanks to its durability and high resistance to external influences, renovation work and cracks in the concrete are significantly reduced. Fibrolux offers a fibreglass-based reinforcement system that fully meets the requirements for sustainability, durability, efficiency and cost savings. As a construction material, steel has been a success story since the industrial revolution. However, steel also has disadvantages, which GRP reinforcement is able to compensate for.

GRP reinforcement mats have some unbeatable advantages over steel, which have made them indispensable for a variety of applications in construction projects for several years:

GRP reinforcement mats - solutions for the construction industry

Corrosion-free – durability
Very high tensile strength at the same Ø compared to steel
Allow for low concrete coverage
Chemical resistance
Electrically/thermally non-conductive
Easy to machine and process
Very light weight despite their many properties
Practical handling with spacers and cable ties
Material has excellent load-bearing capacity
Efficiency/cost savings, smaller Ø required

Plastering walls becomes easier:

Adhesion to the substrate is better
The use of materials is reduced
The formation of cracks is virtually impossible.

The same advantages that apply to plastering walls also apply to plastering ceilings.
Here, the improved adhesion of the plaster is an even more important factor:

The repair of components, even in difficult places, is particularly facilitated by the simple handling and processing of GRP mesh grid mats and is completed in a shorter time.