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,

 

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