In cooperation withMC-Bauchemie Müller GmbH & Co. KG

Whisper-Grip®

A member of the vdw-group

Skid resistant enhancingand noise reducingroad surface dressing

Safer and less noisy

Giesberg TunnelSwitzerland (N6 Interlaken/Brienz)20,000 m2

Over 20 years’ experience and more than3.5 million m2 speak for themselves!You may have even already been drivingon Whisper-Grip®. Check our reference listof Whisper-Grip® laid in Germany andinternationally.

The three main problemswith our roads …

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1.A lack of skid resistance has beenidentified in accident analyses

as one of the main causes for roadaccidents by departments for roadsafety and transport. The number ofaccidents correlates directly to thenumber of vehicle registrations. Inorder to “identify” the high risk areasthe skid resistance properties of theentire motorway road network inGermany has been SCRIM-tested.Depending on the wearing courseaggregate type and the Polished StoneValue (PSV), a significant part of themotorway network is classed as beingat “caution level”, if not at “thresholdlevel”. Should investigations provethat road sections with a lack of skid-resistance cause a significant increasein accidents in wet road conditions,immediate action must be taken.Whisper-Grip®, the new road surfacetreatment based on reactive resinsand special aggregates provides thesolution. (Complies with Germanregulations ZTV-BEB-StB 02,German regulation for rehabilitationof concrete roads).

2.Noise pollution caused by tyres.

Traffic noise is “the bane ofmodern life”. New guidelines andregulations over the last few yearshave led to vast improvements inpassive noise protection. However,noise barriers don’t always meet thenecessary economical and ecologicalcriteria. That’s why active noise pro-tection should be of prime importance.The aim must always be noisereduction at source. An optimised,quiet road surface can be achievedwith Whisper-Grip®.

3.Traffic obstructions as a resultof road maintenance works will

increase even more in the future. Aquick and economic surface dressingsystem such as Whisper-Grip® benefitshighway maintenance, organizations,drivers and all other road users.

BAB A40 Wankum/Wachtendonk(motorway), Germany12,100 m2 (1 lane, km 6.3 – 10.9)

A3 Südautobahn (South) Klagenfurt/Velden(motorway), Austria63,000 m2 (km 325.8-348.3)

BAB A8 Karlsruhe/Stuttgart(motorway), Germany17,000 m2 (km 254.7-253.2)

… and their fast andeconomic remedy.

Bridge Project SchengenLuxembourg4,000 m2

■ old surface ■ Whisper-Grip®

Device for the measurement of gripand skid resistance values

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The Whisper-Grip® Safety Concept

Worn and polished road surfaces canachieve micro and macro texture bythe application of Whisper-Grip®. Themicro texture gives the road surfaceprofile peaks, i.e. the area in contactwith the tyre which increases frictionbetween tyre and road surfaces.A macro roughness between 0.2 and3 mm provides the road surface withexcellent drainage properties that arecomparable with open-pored asphalt,where excess water quickly drainsaway below the surface.

Whisper-Grip® surface dressings arecharacterised by optimised micro andmacro roughness that provide stronggrip and excellent skid resistance.Tests have shown that grip and skidresistance values between 50 and 55SRT result in twice as many accidentson wet roads compared with a valueof 60 SRT. Whisper-Grip® howeverprovides grip values between 70 and85 SRT. Even with regard to SCRIMmeasurements or the Stuttgart-friction-measurements friction values havebeen found to be excellent – the decid-ing factor in the elimination of aqua-planing. It is also been demonstratedby statistical analyses that accidentnumbers are drastically reduced whereWhisper-Grip® has been applied.

Tyre noise reduction through

Whisper-Grip®

The main cause of traffic noise is thenoise generated by the rolling contactbetween the tyre and the road surface.Heavy noise pollution occurs whencars travel at only 30 km/h and trucksat around 60 km/h and above already.

On Whisper-Grip® wearing courses thetyre noise is significantly reduced dueto a surface that is much more finely-structured. Noise measurementsaccompanied by frequency analysesdemonstrate this strikingly (see diagramon page 7). In bridge constructionalternative noise protection measuresare frequently impractical. Here tyrenoise can often only be reducedby applying Whisper-Grip® surfacedressing.

BAB A5 Achern/Appenweiler(motorway), Germany51,000 m2

Seelisberg TunnelSwitzerland (A2 Luzern/Gotthard)3,450 m2

Whisper-Grip® – one surfacedressing for many differentrequirements …

Katschberg TunnelAustria (A10 Tauern Motorway)20,000 m2

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How does Whisper-Grip® work?

Whisper-Grip® is a surface dressingthat can be applied to both asphaltand concrete wearing courses.Whisper-Grip® is a two-componentreactive resin agent mixed with a highpolish stone value (PSV) aggregate(maximum particle size 4mm).

Electronically controlled applicationequipment is used to spray the correctamount of resin binder onto the drysurface. The rate and speed of appli-cation is determined by the pumpcapacity and the settings determinedby the operatives.

Immediately after the resin applicationspecial high PSV aggregate is scatteredonto the still wet surface. Dependingon the amount of resin applied, 1–2mm, 2–3 mm or 3–4 mm aggregatesare used.

After curing of the reaction resinthe strews aggregate that hasnot bonded is removed by roadsweeping machines.

Immediately after application

of Whisper-Grip® the road can be

re-opened for traffic.

The exceptional bonding properties ofthe binder resin ensure durability ofthe surface dressing. The outstandingproperties are certified through:■ ZTV-BEB-StB 02 (German)For the structural maintenance andrepair of concrete traffic surfaces■ “Notes on slid resistance enhancing

measures for asphaltic traffic surfaces”,edition 2002, by the Research Instituteof the Department of Transport. (Germany)

A2 Südautobahn (South) Kärnten(motorway), Austria41,300 m2 (km 328.7 – 331.0)

BAB A57 Köln/Neuss(motorway), Germany78,000 m2 (km 107.8 – 97.2)

HVO busbaan UtrechtNetherlands7,300 m2 (coloured Whisper-Grip® surfaceto separate bus lane)

… skid resistant, quiet, light-coloured and quickly installed

A7 Genua, Vignole, RoncoItaly33,000 m2

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Whisper-Grip® – tried-and-tested

and highly adaptable

The unique application of Whisper-Grip® ensures rapid installation. Shortlane closure times are also ensuredthrough the special formulation of theresin binder. These advantages havemade Whisper-Grip® the preferredchoice for road surface treatment,especially in tunnel road works.

Often tunnels only have two lanes andclosing one of them causes significanttraffic disruption. The fast applicationrate minimises the negative impacton traffic flow. Up to 20,000 m2

of Whisper-Grip® can be applied ina single day (application at night orday possible).

Improved visibility in dark and wet

conditions combined

The cubic form of the aggregateparticles combined with the excellentsurface texture of Whisper-Grip® resultin a superb retro-reflection of theheadlights even on wet roads.Therefore visibility particular in darkand wet conditions is improved.The surface appearance can be furtherenhanced by the use of a special light-coloured bauxite grit; an additional

safety aspect of Whisper-Grip®!

A smooth ride –

thanks to Whisper-Grip®

Busy road networks and the steadilyincreasing traffic volume frequentlynecessitate tailor-made solutions.Special coloured lanes for instance canbe laid quickly and cost-effectively.

The use of a special aggregate, suchas red porphyry or granite, makes itpossible to create coloured roadsurfaces with Whisper-Grip®. Thisachieves a good visual separation ofdifferent traffic zones.

BAB A4 Eisenach(motorway), Germany19,500 m2 (both directions)

Intercontinental Airport Leipzig/HalleGermany20,000 m2 (de-icing pads with drainage stripsand to sealer)

Whisper-Grip®

– ready for take-off

Airport Den HeldernNetherlands20,000 m2

Airport LeuwadenNetherlands13,000 m2

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Grip-perfection a must

Whisper-Grip® surface dressings arenot just used on motorways and otherclassified roads – its unique applicationtechnology and numerous outstandingqualities have made it the preferredchoice for airport traffic surfaces.

The demands on the surface dressingare extremely high in this particularapplication. Whisper-Grip® has beensuccessfully used in areas whereairplanes de-icing takes place.

In wintry conditions planes are de-icedalmost continuously. This involveslarge amounts of de-icing agents (e.g.“Clear-Way” or “Safe-Wing”) thatform a gelatinous, slippery mass onthe apron. In order to keep the risk ofskidding as low as possible for aircraftand vehicles it is of paramountimportance to achieve high grip andskid resistance on these surfaces.

With a macro roughness between 0.2and 3 mm Whisper-Grip® provides anideal surface that quickly drains thede-icing slurry away from the contactpoint between tyre and surface.

During taxiing an aircraft’s nose wheelputs a heavy point load onto thede-icing surface. With the excellentbonding properties of its binder bothto the substrate as well as to thestrewn in aggregate, Whisper-Grip®

ensures lasting durability of thewearing course.

Resistance to aviation fuel goeswithout saying!

A40 Venlo/Duisburg(motorway), Germany12,000 m2

BAB A81 Stuttgart/Würzburg(motorway), Germany25,600 m2 (1st and 2nd lane)

A10 Tauern MotorwayAustria23,000 m2 (section km 136-133)

Giessbach TunnelSwitzerland (N6 Brienz/Interlaken)17,000 m2

Whisper-Grip® – the leader insurface dressings.

■ old surface ■ Whisper-Grip®

Whisper-Grip® – a versatile productwith 8 important advantages

1. High grip and skid resistance

2. Reduces the risk of aquaplaning

3. Reduces the noise generated by tyres

4. Improves visibility in dark and wet conditions

5. Minimal traffic delays as a result ofrapid installation

6. Multitude of applications

7. High cost-effectiveness

8. Whisper-Grip® can be recycled

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Whisper-Grip® – A system with

good pedigree

griproad, a subsidiary of the VDWGmbH (Gebrüder von der Wettern,“vdw”) has a long and successful trackrecord in road construction.Continuous research, the developmentof new technologies, and a well-established reputation for masteringdifficult technical problems, gripboardis a renowned, sought-after roadconstruction company.

MC-Bauchemie products are used toimprove and refine concrete, protectsurfaces and restore buildings andstructures. Thanks to intensive researchand development MC-Bauchemiehas been able to develop countlessinnovations that have been highlyinfluential in the construction industry.

Both companies pursue the sameethos: to strive for the continuousimprovement of products andprocedures and to develop newconcepts. The technical expertise ofboth companies is trend-setting andforward-looking.

Reduction of moving traffic noise levelsfor passenger cars(according to DIN ISO 362)

MC-Bauchemie Müller GmbH & Co. KG

Am Kruppwald 1-8D-46238 BottropTel: +49-(0)20 41 101-271Fax: +49-(0)20 41 26 44 60www.mc-bauchemie.de

griproad Spezialbeläge GmbH

Alfred-Schütte-Allee 10D-50679 Köln-DeutzTel: +49-(0)2 21 98 06-0Fax: +49-(0)2 21 98 06-285www.vdw-gruppe.de

Dipl.-Ing.

Markus Leischner

Engineer

Tel: +49-(0)2 21 98 06-263mobile: +49-(0)1 71 5 51 05 75email: marcus.leischner@

vdw-gruppe.de

Dipl.-Ing.

Michael Goldschmidt

Phone: +49-(0)20 41/101-294Mobile: +49-(0)1 78/310 10 94email: michael.goldschmidt@

mc-bauchemie.de

A member of the vdw-group