Schöck ComBAR® (composite rebar) belongs to the class of so called fibre composite materials. In fibre composites fibres are combined with other materials to achieve improved properties and synergy effects. The properties of the resulting material can be customized by choosing specific fibres, by adjusting the fibre orientation and by varying the additive and binder contents.
One of the best known composites is glass fibre reinforced polymer (GFRP). It is being used in many fields, such as electronics and shop building, to produce light weight, high strength and extremely durable components.
material properties of straight bars*
|
reinforcing steel
DIN EN ISO 15630
DIN 488
|
stainless steel
EN 10088
|
Schöck ComBAR® |
|
tensile strength ftk (N/mm2)
|
550 |
550 |
1000 |
|
characteristic yield strength fyk (N/mm2)
|
500 |
500 |
1000 |
|
design value of yield strength fyd (N/mm2)
|
435 |
435 |
435 |
|
strain at ultimate limit state εULS
|
2.18 ‰ |
2.72 ‰ |
7.25 ‰ |
|
tension modulus of elasticity (N/mm2)
|
200,000 |
160,000 |
60,000 |
|
design value bond stress fbd C20/25 (N/mm2)
|
2.3 |
2.3 |
2.3 |
|
design value bond stress fbd C30/37 (N/mm2)
|
3.0 |
3.0 |
3.0 |
|
design value bond stress fbd C40/50 (N/mm2)
|
3.7 |
3.7 |
3.7 |
|
concrete cover
|
according to
DIN 1045-1 |
ds + 10 mm |
ds + 10 mm |
|
density γ (g/cm3)
|
7.85 |
7.85 |
2.2 |
|
thermal conductivity λ (W/mK)
|
60 |
15 |
< 0,5 |
|
coefficient of thermal expansion α (1/K)
|
0.8 - 1.2 x 10-5 |
1.2 - 1.6 x 10-5 |
0.6 x 10-5(axial)/2.2 x 10-5(radial) |
|
magnetism
|
yes |
very low |
no |
*all symbols according to DIN 1045-1/EC-2 |