Viaplast® - High-performance waterproofing

365 views

Published on

The role of engineering structure waterproofing is to protect the deck and structure from
the corrosive effects of zenithal water, which may also contain aggressive products such as
decicing salts used on pavements in winter.
Laying a waterproof screen on a concrete deck can sometimes produce unwanted side effects.
Because of the microporosity of the concrete, air and water can become trapped under the
waterproofing and air and steam escaping from the concrete can produce blistering that can
damage the waterproofing and the surface course.
The new Viaplast® process developed by Eurovia eliminates the risk of blistering and can be applied at high output rates.

Published in: Technology, Business
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
365
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
5
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Viaplast® - High-performance waterproofing

  1. 1. ENGINEERING STRUCTURE WATERPROOFING VIAPLaST  ® High-performance waterproofing
  2. 2. VIAPLAST® ENGINEERING STRUCTURE WATERPROOFING The role of engineering structure waterproofing is to protect the deck and structure from the corrosive effects of zenithal water, which may also contain aggressive products such as decicing salts used on pavements in winter. Laying a waterproof screen on a concrete deck can sometimes produce unwanted side effects. Because of the microporosity of the concrete, air and water can become trapped under the waterproofing and air and steam escaping from the concrete can produce blistering that can damage the waterproofing and the surface course. The new Viaplast® process developed by Eurovia eliminates the risk of blistering and can be applied at high output rates. k ey benefits k ey figures omplete absence of blistering C apid application R ew laying constraints F Surface course thickness reduced by at least 25 mm mmediate retrafficking I Over 10 years of technical success Nearly 200,000 laid worldwide m2
  3. 3. AN UNRIVALLED PROCess Viaplast® is therefore a very suitable process for waterproofing multi-storey car parks, due to its light weight. Viaplast® is a one-of-a-kind product that has revolutionised concrete road bridge waterproofing. It uses a self-adhesive sheet that is applied at high speed and prevents the appearance of blistering. The absence of blistering, even when the uncoated layer remains exposed to the sun, has been demonstrated in all projects carried out to date. Viaplast® is a new and exceptionally effective process that broadens the Eurovia range of waterproofing techniques. Laying output rates are substantially higher than those of hot-welded sheets. The complex can be re-trafficked before the final surface course is laid, which reduces lead times and worksite constraints. Thanks to the presence of the sand asphalt and the absence of blistering risk, the surface course thickness can be reduced: 45 mm for T2 traffic (200 trucks/day) 25 mm for light traffic (A conventional single-layer adhesive waterproofing must be overlaid with at least 70 mm of asphalt mix.) a few major projects harilaos Trikoupis Bridge in Greece C aine viaduct (A11 motorway) M lermont Ferrand light rail C laubert bridge in Rouen F
  4. 4. The Viaplast® complex is made up of a fillerised elastomeric bitumen reinforced with a non-woven polyester fabric. The upper surface is sanded and covered with crepe paper, which can be peeled off. Cold adhesive elastomeric bitumen strips are attached to the underside. These calibrated discontinuous strips are separated by nonadhesive film zones. A siliconed film, which is removed during laying, protects the underside as a whole. The complex is laid cold in a semi-adhesive process. This allows for high laying speeds and avoids the blistering that can occur with overall adhesion. Characteristics 3.5 kg/m2 2.5 mm 1m 11 cm 10 m Mass per unit area Nominal thickness Roll width Width of welding strips Length of standard roll * Excluding thickness of adhesive lines. Substrate preparation – sweeping, pressurised water cleaning, cold priming – is the same as for a conventional adhesive membrane. Flashing is installed conventionally by welding a Hydroplast® type membrane. The joints at the end of the engineering structure and at roll ends must be completely closed by full-surface welding to avoid unwanted water ingress through the parts of the waterproofing that do not adhere to the deck. SE COND layer Viaplast® microconcrete owes its mechanical properties to the binder used, which can be pure or contain an additive,“Additive R”, which is added into the mixer. For a continuous mixing plant, the binder can be prepared by mixing Additive R into the bitumen during binder production (Liant R® binder). The additive makes it possible to produce an asphalt mix with high binder content, low voids content ( 6%) and therefore low permeability coefficient, with no risk of rutting. The microconcrete is laid at high output rates using conventional laying equipment. Surface course 0/6 microconcrete thickness = 25 mm Self-adhesive strip } Viaplast® A Technical Opinion was issued for Hydroplast® and renewed in 2004. A Technical Opinion was issued for Viaplast® in 2002. Hydroplast® and Viaplast® are registered trademarks. Concrete with cold primer dressing 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 - May 2011 - photos credit : photolibrary Eurovia f irst layer

×