novAplAst ®

WATERPROOFING PROCESS

Double waterproofing

NOvAPlAST®

WATERPROOFING PROCESSAn 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

   A structure that can be adapted to all types of traffic

   A process used both in new construction and maintenance

   Better long-term view in terms of management and maintenance strategy of the structure

kEy FIGuRES

2 componentsfor a perfect waterproofing

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.

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.

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 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.

TOdAy’S SOluTIONAfter 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.

The system which was then chosen consists of a prefabricated sheet protected by a bituminous micro-asphalt 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.

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.

yESTERdAy bACkGROuNd

>   Micro-asphalt mix Microplast® N with highly modified 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.

>   Wearing course of minimum thickness of 45 mm. In 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 hot-air, 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.

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

After careful cleaning of the substrate, the various components of the Novaplast® process are applied as follows:

>   Cold impregnating varnish. Unlike conventional varnishes based on solvents, the new varnish, used preferentially for Novaplast®, is a solvent-free emulsion.

>   One-component liquid resin to carry out the 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.

>   Prefabricated bituminous sheet. It consists of a filler 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.

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

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A METHOdICAl ANd CONTROllEd APPlICATION