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Microvia®

a benchmark in skid resistance

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Better acoustic comfort for users and the surrounding community

Excellent skid resistance

An ideal solution for repair works

Production possible with Tempera® processes

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road construction engineering doctrine in France distinguishes between the structural role

played by the base courses and the functional role required for vehicle traffic, which is provided

by an appropriate surface course. This wearing course can be thin but it must have excellent and

durable surface characteristics.

Microvia® is a modified binder based sand asphalt with 0/6mm 2/4 gap grading developed by

Eurovia for surface courses. The solution offers both comfort and performance.

mIcROVIa® HIgH-peRfORmaNce saND aspHaLT

Millions of square metres

applied worldwide

A product recognised since 1984

laid in a maximumthickness of 10 to 30mm

fROm THe ROaD TOTHe mOTORWaY: a pROcess WITH maNY appLIcaTIONs

Microvia® can be employed in a wide variety of projects. The surfacing can be used on all properly designed pavements and withstands all types of traffic on both urban streets and country roads. Its excellent skid resistance properties at all speeds ensure safety for motorists. Microvia® is the surfacing of choice for pavements with high-speed traffic such as national highways, expressways and motorways.

Microvia® is also much appreciated in suburban and urban areas thanks to its low rolling noise properties, which changes little with age, and to its very aesthetic appearance, which is due to the small size of the aggregates used.

The performance of Microvia® accounts for its success; millions of square metres have been applied in France since 1984 and many projects have been carried out in a large number of other European countries.

OuTsTaNDINgskID ResIsTaNce

The chart below shows the envelope of braking force coefficient values (NF P 98-220-2 standard) measured after one year of traffic on a variety of Microvia® TM projects compared to the envelope of values for all surfacings in France.

The surfacing’s excellent macrotexture is characterised by its average texture depth ATD (EN 13036-1 standard) when new, which is always greater than 0.8 mm. The surfacing more than meets the specification of the skid resistance Circular No. 2002-39 of 16 May 2002 in both urban and suburban as well as interurban areas, i.e. for all authorised traffic speeds.

Microvia® TM envelopeNational envelope, all surfacings

Speed(km/hr)

05040 60 70 80 90 100 110 120

BFC

0,2

0,4

0,6

0,8

because eVeRY DeTaIL cOuNTs

Microvia® is always laid over a tack coat, which is most often a modified bitumen emulsion. This waterproofs the substrate and ensures the excellent bonding on which the long service life of the surface course depends. Two types of Microvia® are offered. They differ in the thickness in which they are laid.

Microvia® TM meets the requirements of the EN 13108-2 Class 1 and Class 2 "very thin asphalt layer concrete" standard.

a specIaLmIx DesIgN

The qualities of Microvia® are the result of the combination of a specific grading and a polymer-modified bitumen.

The mechanical performance of Microvia® TM is always superior to the specifications of the VTLAC standard.

The aggregates are chosen according to the EN 13043 "Aggregates for bituminous mixes" standard and meet the requirements of the EN 13108-2 standard. A high percentage of 4/6 crushed chips and a low dose rate of 0/2mm crushed fines result in a gap graded curve and a very coarse asphalt mix.

The Microvia® binder is selected from the Polybitume® range of polymer modified bitumens developed by Eurovia or from the Styrelf® binder range.

The various degrees of modification offered by the Polybitume® range of binders makes it possible to match the binder to the specific requirements of each project according to the nature and characteristics of the substrate, traffic, loadings and weather conditions (see technical fact sheets presenting the various types of Polybitume®).

Polybitume® P is covered by a Technical Opinion.

TECHNICAL DEPARTMENT

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

Tel.: +33 1 47 16 38 00 - Fax: +33 1 47 16 38 01

www.eurovia.com

technique@eurovia.com

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Microvia®, Tempera®, Polybitume® and Styrelf®, are registered trademarks.

fuLL peRfORmaNce

Microvia® TM

Very Thin Layer Asphaltic Concrete (VTLAC), 20 to 30mm thickness

Microvia® UM

Asphalt for Ultra Thin Layer (AUTL), 10 to 20mm thickness