Straight bars
Straight bars
Bar sizes, dimensions, weights, ultimate tensile strength
| ComBAR® bar |
designated diam. (ACI/CSA) |
core diam. (mm) |
exterior diam. (mm) |
specific weight (kg/m) |
| ø 8 | M8 | 8 | 9 | 0.13 |
| ø 13 | M13 | 13 | 13.5 | 0.30 |
| ø 16 | M15 | 16 | 18 | 0.53 |
| ø 20 | M20 | 20 | 22 | 0.80 |
| ø 25 | M25 | 25 | 27 | 1.22 |
| ø 32 | M32 | 32 | 34 | 1.93 |
Material properties of straight bars
|
properties |
values |
comments |
|
ultimate tensile strength |
> 1,000 MPa |
all bar diameters |
|
1,000 hour tensile strength 1) |
950 MPa |
5th percentile |
|
logarithmic temporal slope 1) |
< 15 % |
5th percentile |
|
modulus of elasticity |
> 63.5 GPa |
8, 12, 16, 25 mm 2) |
|
ultimate elongation |
1.67% |
ø 16mm bar 2) |
|
bond strength |
12.2 MPa |
ø 16mm bar |
|
bar surface profile factor (bond) |
≤ 1.0 |
(CSA S806 9.3) |
|
bond coefficient |
0.6 3) |
(CHBDC 16.8.2.3) |
|
bar surface factor |
≤ 0.8 |
(CHBDC 16.8.4.1) |
|
transverse shear strength 4) |
≥ 150 MPa |
acc. CSA / ACI |
|
min. concrete cover |
d + 10 mm/d + 5 mm (pre-cast) |
min. cover for load transfer |
|
fibre content |
> 75 % (vol) |
no secondary fibres or fillers |
|
void ratio |
< 1% |
–
|
1) values for determination of design value of tensile strength according to durability concept of fib defining time-to-failure lines
2) values for 16mm ComBAR® bars (certification of compliance with ISIS specifications/CSA S807, University of Toronto); certifications for 8, 12, 16, 25 mm bars completed
3) value determined for ComBAR® bars of all diameters
4) values in tests according to CSA / ACI not for design of dowels. Ongoing test series shown substantially higher values.
The Quality of all components of the ComBAR® reinforcement system is continuously tested as part of the Quality Control program of Fiberline Composites,
