An essential element for the longevity of concrete structures is to provide an efficient waterproofing to protect the structure against the corrosive action of water. The double waterproofing system occupies a central place to satisfy these conditions. Eurovia is innovating in this area by proposing a waterproofing process new and reliable, which finds its advantage over all types of works, new or maintenance, Novaplast®.

1. WATERPROOFING PROCESS
novAplast
Double waterproofing
®

2. novaplast®
waterproofing process
An essential element for the longevity of concrete structures is to provide an efficient waterproofing
to protect the structure against the corrosive action of water. The double waterproofing system
occupies a central place to satisfy these conditions.
Eurovia is innovating in this area by proposing a waterproofing process new and reliable, which finds
its advantage over all types of works, new or maintenance, Novaplast®
key benefits
key figures
structure that can be adapted to all
A
types of traffic
2 components
process used both in new construction
A
and maintenance
for a perfect waterproofing
etter long-term view in terms of
B
management and maintenance strategy
of the structure
A process chosen in 2011
as part of the call for Innovation
Road launched by the Ministry of
Ecology, Sustainable Development,
Transportation and Housing
(MEDDTL) and by the Setra, in the
« sustainability of civil
engineering structures »
category.

3. Yesterday
background
Today’s
solution
The waterproofing of structures in France falls into
identified categories: mastic asphalt, prefabricated
bituminous sheets possibly protected by mastic
asphalt, resins and mechanized high-rate systems.
After consideration, the main way of reducing costs
has been identified: substituting the mastic asphalt by
a «traditional» bituminous micro-asphalt mix which
will be produced in asphalt plants and applied by
equipment specific to the roadworks industry.
Many project managers and owners prefer a
waterproofing based on prefabricated sheets
protected with mastic asphalt, mainly for security
reasons. The mastic asphalt has however two major
drawbacks:
Only a few production units,
Application at low rate.
The system which was then chosen consists of a
prefabricated sheet protected by a bituminous microasphalt mix specially designed to maximize its level of
density and give it de facto waterproofing properties.
This solution keeps the advantage of the «double»
waterproofing, longevity token.
The challenge was therefore to provide a waterproofing
system more flexible in terms of production and
application, in order to reduce costs, while remaining
on a system based on two waterproofing components
that ensure sustainability.
In order to protect the waterproofing of the structure
for years and future works, the idea of introducing
a pigment in the micro-asphalt mix emerged. This
measure makes it detectable during maintenance
operations, which will facilitate the work of operators
responsible for the repair of the wearing course. This
feature has led Eurovia to apply for a patent.
Thanks to this colorful innovation, the client can count
on a durable waterproofing system able to bear several
maintenance sequences of the surface layer.
This last aspect gives to the new system an adequacy
for each component of the whole structure between its
function and its lifetime:
On one hand, the waterproofing system ensuring its
structural protection role as long as possible,
On the other hand, the wearing course which is
directly in contact with the external factors such as
traffic and climate and should therefore be replaced
more often.

4. A METHODICAL AND CONTROLLED
application
old impregnating varnish. Unlike conventional
C
varnishes based on solvents, the new varnish, used
preferentially for Novaplast®, is a solvent-free
emulsion.
ne-component liquid resin to carry out the
O
waterproofing edges (generally vertical parts
waterproofed so far with sheet). As the varnish
presented above, this product is bringing progress for
working conditions of application teams.
refabricated bituminous sheet. It consists of a filler
P
added bituminous binder highly modified by polymers
SBS and a non-woven polyester steel frame. This
sheet also has a Technical approval for over 10 years
and is therefore largely proven with millions of square
meters of references.
icro-asphalt mix Microplast® N with highly modified
M
bitumen Styrelf® 13/40. Applied from 25 to 30 mm
thick, its high density brings a supplement to the
waterproofing of the process. The binder provides
excellent resistance to rutting, fatigue and cracking.
earing course of minimum thickness of 45 mm. In
W
the common case, it will be a Semi-Coarse Asphalt
Concrete 0/10 or High Modulus Asphalt Concrete
0/10.
The important mechanised laying process allows cost
reduction. First, the sheet is rolled out and hot-bonded
onto the support by a secured device working with hotair, automatically guided. The rate of laying can reach
up 2,000 m2/day while the same operation performed
manually only reaches about 100 m2/day.
Secondly, the micro-asphalt mix is produced in
traditional mixing plant and applied by common
equipment specific of the roadworks industry. These
equipments are available in all Eurovia divisions, which
represent an important network. This solution therefore
reduces transport between the mixing plant and the
jobsite in comparison with the mastic asphalt technique.
Novaplast® is the subject of a request for a patent.
Novaplast® is the subject of a request for a Technical
approval.
Novaplast® is selected in 2011 as part of the IDRRIM
Innovation Awards.
Novaplast® 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
- January 2013 - photos credit: photolibrary Eurovia
After careful cleaning of the substrate, the various
components of the Novaplast® process are applied as
follows: