Microsurfacings have proven their effectiveness in a large number of road projects and represent an excellent compromise between technical characteristics and costs. Eurovia has developed a "second generation" microsurfacing that confirms this technical performance track record, especially in terms of skid resistance and durability.

1. microsurfacING with high skid resistance
Gripfibre
®
Strong skid
resistance

2. GRIPFIBRE®
MICROSURFACING
WITH HIGH SKID RESISTANCE
Microsurfacings have proven their effectiveness in a large number of road projects and represent
an excellent compromise between technical characteristics and costs. Eurovia has developed
a "second generation" microsurfacing that confirms this technical performance track record,
especially in terms of skid resistance and durability.
The innovative aspect of this microsurfacing is the inclusion in the formula of synthetic fibres
that have undergone special surface treatment. They make it possible to apply gap-graded mix
designs without risk of segregation and thus ensure lasting surface texture. They reduce the risk
of emulsion drainage and loose chippings when the road is re-opened to traffic.
Gripfibre® can be produced in a wide range of colours to differentiate traffic zones – bicycle lanes,
emergency lanes, private roads, etc.
Key BENEFITS
KEY Figures
old, ultra-thin technique
C
nergy savings and raw materials
E
conservation
10mm thick
surface course
apid re-trafficking
R
educed inconvenience for users
R
and the adjacent community
Several million
fibres per m2
xceptional skid resistance and
E
durability
Nearly
15 million m2 of
microsurfacing applied annually
worldwide
ATD
values of up to 1.8mm

3. SUPERIOR SKID
RESISTANCE
simplicitY and
excellence
Gripfibre® offers an effective and safe alternative
to surface dressings, for example on variable
substrates and winding roads. The process represents
an economic way to regenerate roadway surface
characteristics in both rural and urban areas, where its
low thickness eliminates the need to raise the level of
joints, kerbs and manholes. It is routinely used to meet
accident zone treatment requirements.
Gripfibre® is a 0/6, 0/8 or 0/10mm dense or gap
graded microsurfacing with added fibres. It is usually
applied in a single layer of about 10mm thickness over
properly shaped substrate. Gripfibre® extends the
service life of structurally sound pavements.
100%
BENEFICIAL
Gripfibre® achieves unprecedented
skid resistance and durability levels.
It can be used for construction and
maintenance of roads of all traffic
loads. It is applied at high laying rates
and can be rapidly re-opened to
traffic, thus reducing inconvenience
to users and the adjacent community.
A dual layer application is possible in cases of limited
substrate deformation (less than 20mm under a
3m straight-edge). For greater deformations, prior
reshaping or cold planing is required.
Gripfibre® is produced and laid by a single selfpropelled machine that transports and stores the
constituent materials, proportions them, mixes them
and spreads them over large widths on the roadway.
The equipment used by Eurovia is fitted with extending,
variable-width spreaders. Some machines use frontend loading and continuous feed of both aggregate
and liquid components and thus achieve very high
application rates.

4. Gripfibre® waterproofs pavements and provides
them with durable skid resistance.
The macrotexture is high in new pavements and
does not suffer a marked reduction over time.
Average texture depth ATD (EN 13036-1)
0/6 Gripfibre® dense graded
0.6 to 0.8mm
0/6 Gripfibre® gap graded
0.9 to 1.4mm
0/10 Gripfibre® gap graded
1.3 to 1.8mm
Measured after 1 year of T1 traffic (500 trucks / day)
0/6 Gripfibre® gap graded
0.7 to 1mm
After 7 years of T0 traffic (1200 trucks / day)
Skid resistance levels are also high and in newly
laid surfacings and change very little over time.
The following table shows average braking force
coefficient (French NF P 98-220-2 standard)
measured on representative gap-graded
Gripfibre® surfaces.
0/6 Gripfibre®
A75 motorway
(Central France)
RN 56 highway
(Eastern France)
Traffic
T0
T1
CAREFULLY SELECTED
COMPONENTS
The aggregates used in Gripfibre® come from
hard stone quarries, which the company
carefully selects for the purpose. They meet
the same requirements as those used in hot
mix for surface courses (EN 13043 standard).
New mix designs incorporating reclaimed
asphalt pavement are possible.
The Gripfibre® binder is usually a cationic
modified bitumen emulsion with slow
controlled breaking properties, Emulvia®
Grip P or Emulvia® Grip S. A pure bitumen
emulsion may also be used, depending on
the traffic volume for which the pavement is
designed.
0/10 Gripfibre®
section
The usual spread rate, applied to a substrate of
appropriate quality, is respectively 13kg/m2 for
a 0/6 grading and 20kg/m2 for a 0/10 formula,
approximately.
1 year
4 years
1 years
5 years
40kph
0.56
0.57
0.51
0.41
60kph
0.5
0.51
0.43
0.38
-
-
0.39
0.34
0.4
0.41
-
-
BFC
80kph
at 90kph
The fibres are synthetic and over 4mm in
length. They are added at a dosing of several
million fibres per m2 to reinforce Gripfibre®.
The other additives (cement or lime and
surfactant in aqueous solution) control
the setting of the emulsion and adapt it to
worksite conditions.
Gripfibre® is patented, as is the fibre proportioning system.
The process is covered by French Technical Opinion No.
137 and by British Board of Agrement, Quebec Ministry of
Transport and Sétra certificates.
Gripfibre® is a registered trademark.
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
- August 2013 – 500 copies – Photos: Eurovia photo library
DEPENDABLE
SKID RESISTANCE