LOW-NOISE THIN SUrfACE COUrSE

VIAPHONE®

Acoustic comfort and high skid resistance

kEyBENEfITS

Easy to apply

Excellent skid resistance

Substantial reduction in rolling noise

Greater acoustic comfort for surrounding communities and users

kEyfIgUrES

As automobile traffic increases in urban areas, noise generated by vehicle traffic has become an

increasing nuisance and a growing concern. Road traffic noise abatement has therefore become

a major priority.

Viaphone® is a low-noise mix designed to meet urban requirements. It is one of the products

developed by Eurovia to meet the new expectations of those living in the vicinity of roads and of

road users with respect to noise abatement and more broadly to environmental protection.

Viaphone® is an innovation that combines exceptional acoustic and skid resistance properties.

VIAPHONE® LOW-NOISE THIN SUrfACE COUrSE

Perceived road traffic noise halved

Laid in a thickness of

20 to 40 mm

THE WINNINgfOrMULA

Viaphone® efficiently and sustainably combats rolling noise pollution generated by vehicle traffic. It has a lower risk of long-term silting up than porous asphalt. Based on its intrinsic properties, it is a surfacing of choice for construction and maintenance of urban and suburban pavements: streets, thoroughfares, highway access routes, roundabouts, etc.

In addition to comfort and safety, Viaphone® offers a uniform surface and a fine, aesthetically pleasing mosaic. In urban works, since it is applied in a thin layer it requires no manhole leveling and presents limited joint problems.

ExCELLENCE, ACrOSS THE BOArD

Viaphone® has a 0/6 gap-graded 2/4 mineral structure with a high percentage of 4/6 chips, giving it a very coarse particle size distribution curve.

An appropriate tack coat – using a modified bituminous emulsion for heavy traffic - waterproofs the substrate and contributes to the surfacing’s tangential shear resistance. The use of a special rapid and controlled breaking emulsion keeps the site and its surroundings clean. Light gritting together with a conventional emulsion achieves the same result; a paver with integrated spray bar can also be used.

VIAPHONE rECOgNISED fOrITS PErfOrMANCE

BINDEr PArTICULArS

Viaphone® was selected by the Direction des Routes as part of the Road Innovation Charter. The report on projects carried out in that context stated that the objectives of “reducing rolling noise and improving skid resistance” were achieved. The certificate has been delivered in 1996.

A French Technical Opinion was also issued for Viaphone® which was the industry’s first low-noise surfacing to be covered.

The binder used is generally pure bitumen with an addition of organic fibres. Depending on traffic and loading, it can also be selected from the range of polymer-modified binders developed by Eurovia

Polybitume® P is covered by a French Technical Opinion.

The relatively high binder content improves the workability of Viaphone® and facilitates its application.

OPTIMISEDNOISE ABATEMENT

The low size range of the chips used in Viaphone® reduces the noise induced by the impact of vehicle tyres on rough pavement surfaces. Fibres primed with bitumen act as an «acoustic damper». Rolling noise measurements have been carried out on a variety of road sections laid with Viaphone® using the «controlled vehicle» procedure from the «In situ characterisation of roadway surfacing acoustic quality» standard.

Note: according to the acoustic pressure road traffic noise characterisation law expressed in decibels, a 3 dB(A) reduction in rolling noise corresponds to a 50% reduction in traffic.

grEATEr SAfETy

The high macrotexture and excellent braking force coefficient at all measuring speeds lend Viaphone® a high level of safety.

Viaphone® is a registered trademark.

In February 2012, Viaphone® has won a Gold prize for the Czech Construction Academy for its highly innovative composition.

Rolling noise (S 31-119-2)

Viaphone® ≈ 72 dB(A)0/10 SCAC ≈ 76 dB(A)(indicative values)

Texture depth by sand patch test (EN 13036-1)

ATD 0.9 mm(indicative values)

Braking force coefficient (P 98-220-2)

60 km/h 0.5090 km/h 0.40(indicative values after 6 months of T1 traffic)

The special formulation, which includes fibres, lends Viaphone® its low rolling noise and high skid resistance

properties. The acoustic performance of Viaphone® also stands out as a result of its stability over time.

ACOUSTIC COMfOrT IS ENHANCED

TECHNICAL DEPARTMENT

18, place de l’Europe - 92565 Rueil-Malmaison cedex

Tel. : 33 (0)1 47 16 38 00 - Fax : 33 (0)1 47 16 38 01

www.eurovia.com

technique@eurovia.com

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