Presentation asphalt reinforcement bebit g plus

© BECO Bermüller & Co. GmbH1

Asphalt reinforcement

BEBIT G and

BEBIT G PLUS

http://www.beco-bermueller.de/start.html


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



PET vs. GLASS

Average crack length ≈ 4 mm (72 mm without reinforcement)

Average crack length ≈ 18 mm (72 mm without reinforcement)

Easy recycling due to the mineral baseDifficult recycling possibilities

Softening point: 800 - 850 °CSoftening point: 180 - 190 °C

E - Modulus of glass is much higher than of asphalt efficient reinforcement

E - Modulus of PET is fare lower than of asphalt no reinforcement

The low elongation of < 3 % and the similar physical properties of the glass grid and asphalt creates rigid asphalt layers and prevents cracking.

The high elongation of 10 - 16 % allows movements of the asphalt layers. The asphalt cracks even before the grid is able to react.

GLASSPET



Crack propagation

0

10

20

30

40

50

60

70

80

1 2 3 4 5 6 7 8 9 10 11

Number of Load Changes in 100.000

Av

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th o

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mm

Without BEGRID or BEBIT

With PES Geogrid

With BEBIT G or BEBIT G plus

PET vs. GLASS

Beam Test @ Nottingham University

Without BEBIT G Plus

With BEBIT G Plus



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



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



BEBIT G



BEBIT G Plus PET



• one side laminated on: 140g-PES-nonwoven

• strength: 50/50 kN/m, 100/100 kN/m

• width: 2,20 m





BEBIT G Plus PET



BEBIT G Plus



• 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)





BEBIT G Plus



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



• 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




• 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




• 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.




• 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.




• 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.




• The overlapping of long-itudinal and diagonal connections should be at least 2 openings

• The overlapping should also be done in the work flow direction

work flow direction

2 openings

overlapping

• After installation of BEBIT G Plus there shouldn’t be any traffic except the asphalt paver and its supplier trucks




• 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




• Because of the mineral row material base BEBIT G Plus can be cut easily with regular implements on side




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 !



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 !



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



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


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Presentation asphalt reinforcement bebit g plus