Basiscursus Asfaltverhardingen 2016

Use of Colas Active Sealing – With PenTack

To prolong the service life of road pavement

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Asfalt Innovatie Symposium 2019Research meets Industry

Colas Danmark

Basiscursus Asfaltverhardingen 2016

Prolong the service life with

Colas Active Sealing with PenTack

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Asfalt Innovatie Symposium 2019Research meets Industry

Henrik StaerColas Danmark

Inhoud

• What is PenTack.

• When is it optimal to use.

• Work process.

• Test result.

• Pictures.

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AirportsMotorways and roads

Automobile testing centers

We work within 3 main areas

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What is PenTack, and what does it contain

Description Function

Bitumen emulsion • Binder from bitumen emulsion is added

• Holes between the stones are filled up

• Amount of water getting down into the pavement is reduced

• The dosage is adjusted depending on each Pavements

Rejuvenator emulsion • The existing asphalt bitumen is added new and easier carbon

compounds

• Adhesion between stone materials and binder are re-established

• Approved flexibility in as well the surface as in the depth of the

asphalt pavement

Water • Added to achieve the optimum viscosity of PenTack®

Crushed granite • 0 – 2 mm

• 0,4 – 1,2 kg. per m2

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Preservation of Asphalt Pavements

Unique preservation process

• Cold applied bitumen emulsion based system.

• The 3 components spray-material is adjustable during application.

• The viscosity is adjusted to the pavement it is sprayed on.

• The spray rate is continuously optimized to the type and degradation status of the asphalt.

• Significant ability to penetrate into the asphalt.

• Sanded with different types and sizes of aggregate depending on

type of working area.

Before PenTack® sealing After PenTack® sealing

The yellow parts in the illustration are the added binderThe red dots represent the fine aggregate

The combined result adds asphalt mortar and restores the Microstructure of the surface

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Normal degradation curve without maintanance

Colas Active Sealing – with PenTack®

Alternative will be:

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Preventive maintenance with PenTack Sealing

Colas Active Sealing – with PenTack®

Pavement condition

….putting the degradation curve back in time.

Time

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Right time for Sealing is…

Colas Active Sealing – with PenTack®

• When you see the stone lost from the pavement.

• When you see approx. 30% of the top of the stone in your pavement.

• When the mortar is gone.

• When the pavement still is without potholes etc.

Before PenTack After PenTack

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Work process – PenTack sealing

Colas Active Sealing – with PenTack®

Handspraying work

Spraying work

Adding sand

2 months after

Air bubbles indicate penetration

Water has evaporated

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Principles of PenTack ®

UV photos

Colas Active Sealing – with PenTack®

Width : 10 cm

Depth: 3,5 cm

Top layer: Open asphalt 8 mm

Aggregates (Void volume 13-15%)

Top layer: Drainage asphalt

(Void volume 23%)Depth: 5,0 cm

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PenTack Sealing of M64 highway

Colas Active Sealing – with PenTack®

Test site facts:

Where: Motorvway M64 - Km 55,9 -61,2 - Slow lane

Asphalt type: Noise reducing asphalt from 2006

Goal: To prolong the expected lifetime of the wearing course by sealing with PenTack while keeping the skid resistance above the limits given in the Danish regulations.

Surface

Crack/void alongStone

PenTack Sealing

Stone

Mortar

After PenTack sealingBefore PenTack sealing

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Before and after PenTack ®

Colas Active Sealing – with PenTack®

5 years after

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6 years after

Before and after PenTack ®

Colas Active Sealing – with PenTack®

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Before and after PenTack ®

Colas Active Sealing – with PenTack®

Before PenTack® preservation

Porous friction course RAF Loussiemouth

After PenTack® preservation

The following summer

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Before and after PenTack ®

Colas Active Sealing – with PenTack®

Henrik StaerHenrik.staer@colas.dk+45 40 16 31 42