Aslan 600 GFRP Dowel Bars

Aslan 600 Glass FRP Dowel Bars

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Are used as a “Load Transfer” device between joints in concrete slabs. They provide a mechanical connection between slabs but allow for horizontal contraction and expansion of the slab itself.
The Achilles heel of concrete pavement is the joint. Joint failure is often the result of corrosion of the steel dowel bar. Aslan 600 Dowels will not rust or corrode, locking a concrete joint together or causing spalling of the surrounding concrete. In addition, while providing the necessary shear capacity at the joint, the lower stiffness of the GFRP Dowels may reduce fatigue stresses in the concrete surrounding the dowel.
GFRP Dowels are also electromagnetically transparent and frequently used in high-speed toll collection areas near inductance sensors.

GFRP Dowel Bars are used in:
  • Jointed Rigid Pavement
  • Dowel Bar Retro-fits
  • High Speed Tolling Areas
  • Automatic & Wire Guided Vehicle Areas
  • Canals and Desalination Input Canals
  • Magnetometer Isolation Pads
GFRP Dowel Bars as a Load Transfer Device in:
  • Contraction Joints
  • Expansion Joints
  • Isolation Joints
  • Construction Joints
  • Shear Dowels in MSE Walls

Aslan 600 Physical & Mechanical Properties

Dowel
Dia - mm

Dowel
Dia - in

Nominal

Area - mm2

Nominal

Area - in2

Longitudinal
Shear Strength
per ASTM D4475
shear along
main axis - MPa

Longitudinal
Shear Strength
per ASTM D4475
shear along
main axis - psi

Transverse
Shear Strength
per ASTM D7617
shear
perpendicular
to axis - MPa

Transverse
Shear Strength
per ASTM D7617
shear
perpendicular
to axis - psi

Transverse
Shear Force
per ASTM D7617
shear
ultimate load
perpendicular to axis - kN

Transverse
Shear Force
per ASTM D7617
shear
ultimate load
perpendicular to axis - lbs

16

5/8

197.9

0.307

42.06

6100

151.7

22,000

30.04

6754

19

3/4

285.0

0.442

40.66

6800

151.7

22,000

43.25

9724

25

1

506.7

0.785

58.61

8500

151.7

22,000

76.82

17,270

32

1-1/4

791.7

1.227

58.61

8500

151.7

22,000

120.10

26,994

38

1-1/2

1160

1.800

59.98

8700

151.7

22,000

176.10

39,600

Aslan FRP reserves the right to make improvements in the product and/or process which may result in benefits or changes to some physical-mechanical characteristics. The data contained herein is considered representative of current production and is believed to be reliable and to represent the best available characterization of the product as of July 2011. Transvers shear test is per ASTM D7617, which has superseded the ACI 440.3R method B.

The "shear strength", typically the "transfers" or "double shear" strength of the Aslan 600 is determined using the ASTM D7617 method. Formerly, this method was described in ACI 440.3R method B.4. Nuances of the test fixture can have influences in the measured results.
a separate parameter, the "longitudinal shear" or "short beam shear" subjects the bar to a three point loading fixture and measures the shear strength along the main axis of the bar. This testing is performed per ASTM D4475.
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Transverse shear testing per ASTM D7617

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Inter-laminar shear or longitudinal shear testing per ASTM D4475

A comprehensive list of physical & mechanical properties of Aslan 600 fiberglass dowel bars is found in our Brochure & Data Sheet

Fiber Content
Fiber content or fiber volume fraction is a key variable in the overall mechanical properties of the GFRP Dowel.

Fiber content > 70% minimum by weight per ASTM D2584
Density
GFRP Dowels are approximately one fourth the weight of steel dowels.

Dowel Dia - mm

Dowel Dia - In

Unit Weight
kg / m

Unit Weight
lbs / ft

165/80.44650.30
193/40.56550.38
2510.96740.65
321-1/41.56271.05
381-1/22.45561.65
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Moisture Absorption
Susceptibility to moisture absorption is a key indicator of successful long-term durability.

24 hour absorption at 122ºF (50ºC) < 0.25%
At saturation < 1%
Transition Temperature of Resin - Tg
Known as the "glass transition temperature" or the temperature at which the resin changes from a "glassy state" and begins to soften.

Tg = 230ºF (110ºC) per ASTM D570

Aslan 600 Non-metallic Dowel Baskets

Aslan FRP currently offers non-metallic dowel bar baskets for 10" (25.4cm) thick and 12" (30.48cm) thick segmental paving. These support chairs are well suited to segmental cast paint, but not appropriate for use with continuous paving as they are unable to resist the large forces associated with the advance of a large mass of low slump concrete.

When slip form paving is used, it is necessary to use a dowel bar insertion machine with the Aslan 600 dowels.

Part Number

Concrete
Thickness - cm

Concrete
Thickness - In

Dowel
Height - cm

Dowel
Height - in

Dowel
Spacing - cm

Dowel
Spacing - in

DBB1500-12-5

25.4

10

12.70

5

30.48

12

DBB1500-10-6

30.48

12

15.24

6

25.40

10

The #3 Aslan 100 GFRP rebar "runner" ties multiple dowel bars together and allows for any variation of dowel bar spacing to be used. If the dowel spacing is narrower than the pre-set spacing of the basket, simply nest a pair of runners beside each other and overlap the baskets slightly at their base.

Minor adjustments in centerline height are also achieved by placing the runners on smaller "dobies" i.e. concrete support blocks or brick of appropriate thickness.
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DBB1500-12-5

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DBB1500-10-6

Handling and Placement

Sealing of Aslan 600 Dowel ends is NOT necessary
Greasing of Aslan 600 Dowels is NOT necessary (the bond strength to the concrete is sufficiently low.)
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When installing dowels in the baskets:
- Press fit the dowel into the opening
- Tap the dowel into the basket from the end to secure the dowel into place
- Attach the dowels and baskets to the runners in the spacing required
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Field cutting of Aslan 600 Dowels is generally not necessary. However, if required use a fine blade saw, grinder, carborundum or diamond blade. Aslan FRP uses a diamond blade in a wet bath for cutting the dowels.
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