2. SEALVIA®
COLD MICROSURFACING
Pavements with surface defects only can be maintained by laying ultra thin surfacings.
Building on its conventional asphalt slurries, Eurovia now offers Sealvia® cold microsurfacing for
cost-effective maintenance of damaged pavements.
key
benefits
key
figures
Virtual immediate re-trafficking
An economic pavement surface
maintenance process
Ultra-thin
10 mm layer
Very easy to apply
L
ess disruption to the surrounding
community
Very high laying rates of up to
20,000 to 25,000 m2/day
Nearly 15 million m2
of microsurfacing applied
worldwide every year, of which
10 millions in France
3. highly
COST EFFECTIVE
an advantageous
process
Sealvia® is a cost effective pavement surface
maintenance technique that does not directly affect
the pavement structure. It is used for the same
purposes as surface dressings and ultra-thin hot
asphalt mixes and can replace them.
Waterproofing, uniform surface appearance and
improved surface roughness are the main benefits
of Sealvia®. Thanks to the use of modified emulsion,
Sealvia® offers many additional advantages:
The equipment used to produce and lay Sealvia is
compact and the product is applied cold and at high
laying rates. For all these reasons, Sealvia® worksites
limit disruption to the surrounding community and to
road users.
reater cohesion,
g
®
Given the very thin layer in which it is applied (10 mm)
and its characteristics, Sealvia® is especially well suited
to the maintenance of urban streets (no ancillary
works) and roads with moderate traffic.
Its range of applications covers both maintenance and
new construction:
unicipal, rural and urban roads,
m
epartmental highways,
d
ousing estate roads, industrial zones,
h
hopping centre car parks,
s
otorway emergency stopping lanes and service
m
areas,
unnel pavements, etc.
t
ower thermal sensitivity,
l
uperior deformability,
s
igher durability,
h
etter water resistance than a pure bitumen
b
microsurfacing.
4. A FULLY CONTROLLED
technique
The macrotexture has been measured on a large
number of projects. The table below shows the values
obtained for a 0/6 Sealvia® after one year under T1
traffic (300 to 750 trucks/day).
Sealvia® combines dense graded (0/10 mm, 0/6 mm
or 0/4 mm) materials and modified bitumen
emulsion. The aggregates are crushed from hard
rock and comply with the requirements of the
EN 13043 standard.
Average texture depth (EN 13036-1)
When the pavement is slightly deformed (by 1 to
2 cm), a dual layer is recommended. At higher
deformations, more extensive treatment – asphalt
mix reprofiling or planing – is needed.
The binder is selected from among the polymer
modified emulsions devised and developed by
Eurovia for this purpose: Emulvia® Grip P or Emulvia®
Grip S. Additives can be used to adapt emulsion
breaking time to worksite conditions.
The macrotexture of the surfacing depends on the
grading of the mineral aggregate used.
0.8 to 1 mm
Braking force coefficient (P 98-220-2)
BFC at 40 km/h
≥ 0.40
BFC at 90 km/h
≥ 0.25
simplified
application
The laying equipment transports and stores the
constituents - aggregates, emulsion and additives.
It mixes and spreads them on the pavement to be
maintained at the required spread rate.
Sealvia® is produced and applied by a single selfpropelled mobile machine. Some machines are front
loading and supply the constituents continuously,
making it possible to achieve high laying rates of
up to 20,000 to 25,000 m2/day. All machines have
extendable spreaders that can be readily adapted to
variable-width surfaces.
An Avis Technique (FTO) has been issued for Sealvia®
(under previous brand names).
Sealvia® is a registered trademark.
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
- November 2010 - photos credit : photolibrary Eurovia
Proportions vary according to substrate type and
condition, traffic and grading. Average dosing per
layer is 15 kg/m2 for the 0/10 grading, 10 kg/m2 for
the 0/6 and 7 kg/m2 for the 0/4.
ATD
