|
|
Dr Sally Humphreys
Applied Market Information Ltd
Market and technology trends for waterproof
membranes
Pages | 1 | 2 | 3 |
Cynthia
Teniers of EVAL Europe has been studying the use of ethylene-vinyl alcohol
copolymers (EVOH) to reduce volatile organic compound (VOC) loss through
geosynthetics. Liners are used to protect the environment by containing
liquids and vapour emissions; however current monolayer membranes can permit
VOCs to pass through. If a 2-4% EVOH layer is added to a PE or PP membrane,
or even to the clay liner, it can greatly improve the barrier performance.
During production of the multilayer polymer membrane an adhesive tie layer is
needed.
H&R ChemPharm has developed a new liquid applied super absorbent polymer
system, which forms a film coating and embeds in the substrate. It is
currently in use in cables in a coated-yarn layer to protect optical fibres.
The company has received enquiries from consultant geo-engineers about using
this system in geomembrane applications as it blocks water and contaminants
and is self-healing. The Technical University of Munich and Bolton Textile
Institute have been studying the potential. The production method is simple
– fabric is immersed in a bath of polymer and then pressed through
heated rollers above 120C before being rolled up.
Fire performance is a critical requirement of building materials. Warrington
Fire Gent carries out fire testing to look at factors like flame spread. The
standards which apply to roofing include ENV 1187 (CEN TS 1187) and EN
13501-5. Protocols include placing a basket of wood wool onto the roof
construction test sample and flaming for 30 minutes with the roof at
different angles. Each European member state chooses a test method and level
of safety.
The International Green Roof Association has highlighted the safety features
for roofing including wind uplift, structural load bearing capability, fire
regulations and drainage. It is particularly important to check the membrane
joins and to test for leaks. A finished roof needs fall protection, which can
be a rope and harness system for maintenance, or full fencing for a roof with
public access. High rise gardens have been opened in Singapore and New York
offering a park experience in the centre of the city.
In the late 1950s Fatra produced one of the world’s first PVC
geomembranes for use in a dam in Dobsina. This Czech company now produces
waterproof membranes for a variety of applications including ground
waterproofing for new buildings, which need to act as a radon and moisture
barrier. The advantage of synthetic membranes is the speed of installation,
low labour, movement with the building minimising tears and cracks, and
excellent chemical resistance. However, they are thin compared to bitumen and
can be torn during installation. An active check system can be built in to
show where leaks are occurring and to facilitate repair. It is much more
critical to get ground waterproofing right first time, because of the
difficulties of access and the consequences of failure. Leak detection
systems are available from Sensor in Bratislava and permit remote monitoring
of membrane installations.
The waterproof membrane market is growing worldwide and providing
multifunctional components to the construction industry and aiding in the
move to LEED certification, by incorporating cooling, gardens and alternative
energy functions. The next AMI networking event for the industry, Waterproof
Membranes 2011, is scheduled for 15-17 November 2011 at the Maritim Hotel,
Cologne, Germany.
Pages: | 1 | 2 | 3 |
Гидрол-Кровля©
При
любом
использовании
материалов
активная
ссылка на
сайт http:||Kgidrol.narod.ru обязательна
|
