Geomreza Bebit G i Bebit G+ za ojačavanje asfalta proizvođača Beko

1. Asphalt reinforcement
BEBIT G and
BEBIT G PLUS
1 © BECO Bermüller & Co. GmbH

2. Contents
1) Comparison PET vs. GLASS
2) BEBIT Glass Grids
• BEBIT G
• BEBIT G PLUS PET
• BEBIT G PLUS
• Experiences and installation of BEBIT G
• Abstract
2 © BECO Bermüller & Co. GmbH

3. PET vs. GLASS
PET GLASS
The high elongation of 10 - 16 % allows The low elongation of < 3 % and the
movements of the asphalt layers. The similar physical properties of the glass
asphalt cracks even before the grid is grid and asphalt creates rigid asphalt
able to react. layers and prevents cracking.
E - Modulus of PET is fare lower than of E - Modulus of glass is much higher than
asphalt  no reinforcement of asphalt  efficient reinforcement
Softening point: 180 - 190 °C Softening point: 800 - 850 °C
Difficult recycling possibilities Easy recycling due to the mineral base
Average crack length ≈ 18 mm Average crack length ≈ 4 mm
(72 mm without reinforcement) (72 mm without reinforcement)
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4. PET vs. GLASS
Crack propagation
80
Without BEBIT G Plus
Average Length of Cracks in mm
70
60
50
Without BEGRID or BEBIT
40 With PES Geogrid
With BEBIT G or BEBIT G plus
30
20
10
With BEBIT G Plus
0
1 2 3 4 5 6 7 8 9 10 11
Number of Load Changes in 100.000
4 Beam Test @ Nottingham University © BECO Bermüller & Co. GmbH

5. BEBIT
• open glass grid:
BEBIT G
• open glass grid + 140g-non-woven:
BEBIT G Plus PET
• open glass grid + flat textured glass:
BEBIT G Plus
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6. BEBIT G
• woven grid: glass filament yarns
• coating: SBR-Latex
• strength: 50/50 kN/m , 100/100 kN/m
• width: 2,20 m
• length: up to 100 lm
• good for recycling because of mineral base
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7. BEBIT G
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8. BEBIT G Plus PET
• woven grid: glass filament yarns
• coating: SBR-Latex
• one side laminated on: 140g-PES-nonwoven
• strength: 50/50 kN/m, 100/100 kN/m
• width: 2,20 m
• length: up to 100 lm
• good for recycling because of mineral base
8 © BECO Bermüller & Co. GmbH

9. BEBIT G Plus PET
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10. BEBIT G Plus
• woven grid: glass filament yarns
• coating: SBR-Latex
• mash filling: flat textured glass (glass texture)
• strength: 50/50 kN/m, 100/100 kN/m
• width: 2,20 m, 3,60 m (June 2007)
• length: up to 100 lm
• good for recycling because of mineral base
10 © BECO Bermüller & Co. GmbH

11. BEBIT G Plus
11 © BECO Bermüller & Co. GmbH

12. Experiences and installation
of BEBIT G Plus
• In advance of a big renewing 4 brand products of
different manufactures have been installed in a
testing field in Zwickau, East Germany.
• Assessments:
- Handling regarding Quality of Installation,
- Roll measurements
- traffic ability
12 © BECO Bermüller & Co. GmbH

13. Experiences and installation
of BEBIT G Plus
• Cracking is a well known problem
in bituminous road surfaces
• Cracking can result from different
causes :
- heavy load
- erosion in the ground
- bad construction of the road surface
- variations in temperature / frost - dew changes
13 © BECO Bermüller & Co. GmbH

14. Experiences and installation
of BEBIT G Plus
• The surface should be
smooth, clean and free of
bituminous leavings
• Cracks and holes are to
be filled and consolidated
• Outlets in the reconstru-
ction area - drains or duct
covers - must be omitted
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15. Experiences and installation
of BEBIT G Plus
• The surface must be dry and
the temperature should be
+10° C minimum
• The reconstructing area is
to be sprayed with a tack
coat with an amount of
about 65 - 70 % bitumen.
• The mass of spray at flat rate is about 500 g/m², the
mass of spray at acclivity and decline respectively of
maximum 8% about 1000 g/m².
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16. Experiences and installation
of BEBIT G Plus
• After a waiting time of about 20 - 40 minutes (at 20 -
25 °C outdoor temperature) following the applying of
tack coat BEBIT G Plus should be installed by
unrolling.
• The amount of tack coat may vary according to the
requirements of the construction site (especially on
flat regulation layers).
• To reach an ideal adhesion the width of the sprayed
area should overlap the total width of the BEBIT G
Plus about 50 to 150 mm each side.
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17. Experiences and installation
of BEBIT G Plus
• Drapes and wrinkles of
BEBIT G Plus during
installation should be
avoided.
• In sharp curves or special
requirements the grid can
be cut in sections.
• If there are still drapes BEBIT G Plus should be cut
layed flat and then sprayed with some extra tack coat
and overlapped in the work flow direction.
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18. Experiences and installation
of BEBIT G Plus
• The overlapping of long-
itudinal and diagonal
connections should be at
least 2 openings
work flow direction overlapping
• The overlapping should
also be done in the work
2 openings
flow direction
• After installation of BEBIT G Plus there shouldn’t be
any traffic except the asphalt paver and its supplier
trucks
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19. Experiences and installation
of BEBIT G Plus
• It is important that road
work vehicles minimise
hard breaking and turning
• Hard truck stops and sharp
turns can damage the grid
• The asphalt should have
an installation temperature
of about 160°C or as specified by the engineer and be
installed with a minimum thickness of 70 mm
19 © BECO Bermüller & Co. GmbH

20. Experiences and installation
of BEBIT G Plus
• Because of the mineral row material base BEBIT G
Plus can be cut easily with regular implements on side
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21. Abstract
 the installation of BEBIT G Plus reinforces the
pavement and inhibits crack formation !
 the durability of the pavement is much extended, so
that consequential costs can be minimised !
 Installation coasts will be optimised through the
application of BEBIT G Plus with an improved and
simplified laying !
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22. Abstract
 the savings in life cycle costs compared with
traditional construction having regard to an
extended reconstruction cycle averages app.
30 - 50 % !
 Numerous of realised projects as well as studies
allocate, that in regard to the above mentioned
Installation Guide an optimal layer bond is
guaranteed !
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23. Airport Bangkok, Thailand
Project: Reinforcing runways and Taxiways, 2nd
International Airport Suvarnabhumi (SIBA)
Owner: Government Thailand
Contractor: ITO Joint Venture
Material: BEBIT G Plus : 240.000 sqm
23 © BECO Bermüller & Co. GmbH

24. Airport Taipei, Taiwan
Project: Reinforcing runways and Taxiways
International Airport Taipei
Owner: Government Taiwan
Contractor: Fo-Thai Industrial Ltd.
Material: BEBIT G Plus : 175.000 sqm
24 © BECO Bermüller & Co. GmbH