Strong stray current isolation performance Corkelast® ERS Canberra

Formally reported measurements to the Stray Current Working Group, show the Canberra embedded rail system continues to prove an excellent seasonal trend.

Rail-to-earth resistance results in the wet surpass 20, while dry conditions show phenomenal readings in the order of 60 to 80

edilon)(sedra Australia supplied the Corkelast® Embedded Rail System (ERS). The ERS track covers 12 kilometres of double track in total and a depot.

The Canberra Light Rail project provides convenient access to the city centre and northern suburbs for residents and commuters. Travellers can use a durable rail connection for many years to come, thanks in part to the proven excellent electrical insulation characteristics of Corkelast® ERS!

In order to explain the theme of stray current isolation, we have made this short animation video (click on the image to start the video).


Newly built Odense Tramway line completed: Danish ‘green dream’ becomes reality

After an intensive period of preparations and installations, the newly built Odense Tramway line is completed. The first test drives have been successfully carried out. We are proud of being part of this project, complying to the latest environmental standards!

The intended purpose of the 14,5 km new double-track light rail transit is to reduce the number of car trips in the growing city, as well as noise pollution and carbon emissions, while reducing lifecycle costs.

We are pleased with the great teamwork before and during the installation of these green tracks. Our well-known edilon)(sedra SDS (Sound Damping System) has been applied in combination with the innovate rail insulation system, edilon)(sedra Editack Spray. This is a unique PU based rail coating system which ensures an optimal degree of stray current insulation. Editack Spray is easy to install even under harsh climatological conditions and can be durably applied on any type of rail, in compliance with all technical standards.

The opening of the new line is planned for the end of 2021. From then on, the dreamed-of tramway is expected to serve 35.000 passengers every weekday, connecting the important administrative facilities, the University of Southern Denmark and shopping areas.

Odense green track

edilon)(sedra Editack Spray – a unique insulation system for all kinds of tramway & LRT tracks






Extension to Vitoria-Gasteiz tram network – It doesn’t get any greener!

edilon)(sedra has been awarded the contract to supply track systems for the 5 km extension of the Vitoria-Gasteiz tramway for contractor UTE Tecsa Altuna and end-customer Euskal Trenbide Sarea. Vitoria-Gasteiz is one of the most environmental orientated cities in Spain.

Investments in green development to improve infrastructure, are supported by both the local government and city council. Low noise and vibrations combined with an outstanding electrical isolation are some of the key requirements for the track.

Our track systems Corkelast® EBS and SDS provide answers to these requirements and will be installed accordingly. Our rail coating solution Editack, will be supplied for rail isolation and our Trackelast® noise & vibration mats for sensitive areas. Product deliveries will start from Spring 2021. Our application engineering team supports with the design works, preparation of switches and installation supervision.

The 5 km extension includes five new platform stops that are identical in structure, size and shape. They will be located in Santa Lucía, La Iliada, Nicosia, La Unión and Salburua. From 2008, we arranged a broad spectrum of rail fastening systems and technical consultation services for the Vitoria- Gasteiz tramway in Spain, including ‘in street’, station, grass and depot tracks (16,5 km in total). The tramlines are perfectly integrated in the urban landscape and offer a vital contribution to the city’s high ambitions in the field of sustainability.


The importance of electrically insulated tracks

A high electrical insulation of the track infrastructure is an important aspect, especially for urban transport modes, such as for light rail and metros. If the railway system is not adequately insulated from the ground, this can lead to damaged tracks and pipes laid underground. Stray currents can cause considerable corrosive damages to the rails, fastening systems and installed track reinforcement. In addition malfunctions in train control and signalling systems are possible effects. Stray currents also lead to the risk of damaging surrounding rusted metallic components that are not part of the railway, such as gas pipes.

The standard EN 50122-2 specifies requirements for protective measures against the effects of stray currents caused by the operation of an electrically powered railway. The following aspects have a significant influence on electrical insulation and should be considered during the track design phase: distance of the substations, return line connections, insulation of the rails from earth and additional measures to improve them.

Often control and signalling technologies, such as train detectors, are in use on the infrastructure to detect and position vehicles, in order to secure the track. The use of such circuits results in specific insulation requirements for the track system. In order to ensure reliable train operation, construction measures must provide defined electrical and magnetic characteristics for track sections in which track circuits are to be installed.

In some cases, the planned slab track is designed with a reinforced in-situ concrete layer. The diameter of the reinforcement also has an influence on the control and signalling systems. Steel reinforcement in the track and track system, such as tie bars or lattice truss girders, dampens the electrical field. If an electrical conductor comes into the oscillating electrical field generated by induction, the frequency will change. For this reason, it is important to ensure a proper electrical insulation of the track system.

In general, a track system is ideally suited if it guarantees a high level of insulation, including a sufficiently large safety buffer to compensate for the difference between laboratory tests and the real condition on the track site.

EBS as safety buffer
The Corkelast® EBS-RF and EBS-UF track systems (EBS) are designed to match these high requirements. The key component of both systems is a prefabricated tray which consists of Geotextile and the Corkelast® elastomer. This material combination ensures a very high electrical insulation. The tray is working as an insulating intermediate layer and will disconnect fastening systems from the track as well as both running rails.

EBS: rail-to-rail and rail-to-earth insulation





Newhaven: remplacement d’un passage à niveau dans une zone ferroviaire et routière à haut risque

edilon)(sedra a remporté le contrat pour la fourniture et le remplacement d’un passage à niveau existant par un passage à niveau à deux voies de 48 m sur les quais de Newhaven, au Royaume-Uni. L’emplacement du passage à niveau est considéré comme une zone ferroviaire et routière à haut risque.

Le passage à niveau de la ligne secondaire sur les quais de Newhaven est utilisé par les rames automotrices de transport de passagers et de marchandises. Le passage à niveau constitue le seul accès à la grande zone de manutention de matériaux en vrac des quais de la ville. Ces quais voient passer un volume très élevé de matériaux d’agrégat en vrac qui arrivent par bateau, la majorité repartant via le passage à niveau. La combinaison des charges lourdes, de la piètre qualité du sol, du mauvais drainage et de l’angle non perpendiculaire du passage à niveau par rapport à la route provoque la déformation du profil de la route, représentant un risque élevé pour les usagers de la route. Des plaintes sont couramment déposées auprès du conseil chargé des enjeux de sécurité.

Le passage à niveau actuel repose sur des panneaux de caoutchouc et la structure sous-jacente est constituée d’alluvions marines saturées sans drainage défini. Le passage à niveau existe depuis environ 4 ans, et n’est pas en mesure de maintenir son profil routier. L’angle du passage à niveau n’est pas perpendiculaire à la route. Ceci génère des forces d’oscillation dommageables lorsque les véhicules routiers à essieux multiples traversent les unités de caoutchouc. Au cours des discussions entre le propriétaire de la voie, NWR Sussex et edilon)(sedra, il a été convenu que la seule solution viable, à faible risque et rentable était d’appliquer le système de passage à niveau préfabriqué Corkelast® LCS-350. Le système est une variante de développement du passage à niveau Harmelen existant, déjà approuvé par NWR.

Passage à niveau actuel à panneaux de caoutchouc sur les quais de Newhaven


Dans cet environnement difficile, les avantages éprouvés du Corkelast® LCS-350 ont été un facteur déterminant dans le choix du système par NWR:

  • Mauvais état du sol – Possibilité de répartir la charge sur une grande surface, ce qui réduit au minimum la pression au sol.
  • Conditions de sol fluide – Comme la voie ballastée a été enlevée et que le système n’a plus besoin de bourrage, le sol est essentiellement scellé sous les dalles, ce qui crée une plateforme intégrée stable, réduisant la possibilité de « pompage » d’eau.
  • Forces dommageables causées par la circulation routière – L’utilisation de dalles plus grandes et plus lourdes rend le système plus stable, de sorte que les forces se dissipent avant que l’effet ne puisse causer d’éventuels dommages.
  • Eau entraînant de la corrosion – Le rail est chimiquement lié au béton, il est donc protégé contre la corrosion. Il n’est plus question d’utiliser des fixations en acier qui souffriraient d’une  corrosion accélérée en raison de la présence constante d’eau.
  • Soutien constant du rail, ce qui réduit la charge maximale associée à la conception traditionnelle d’une voie à traverses, tant pour la circulation ferroviaire que routière.
  • Réduction des risques pour les cyclistes et les piétons grâce à l’intégration harmonieuse des dalles au revêtement routier.
  • Durée de vie de 40 ans et interventions de maintenance minimales.

Dessin du projet de Newhaven, représentant les passages à niveau Corkelast® LCS-350

PRESS RELEASE: new generation of block systems

edilon)(sedra successfully installs a RetroFit solution for worn-out metro tunnel tracks: Corkelast® EBS-RF. A proven refurbishment concept for old booted (bi-)block sleeper tracks under operation. For more information about this fast and reliable replacement solution download our press release.

Dex®-R 2K: durable rail track fixation of Liefkenshoektunnel

In the first half of December Belgian track operator Infrabel officially inaugurated the Liefkenshoek railway tunnel. 

The railway tunnel, which is part of a 16.2 km railway track,  establishes an additional link between the two banks of the Scheldt estuary in the Port of Antwerp, currently Europe’s second-largest port. To ensure a durable tunnel rail track construction edilon)(sedra delivered high-quality adhesive edilon)(sedra Dex®-R 2K and edilon)(sedra DFS (Direct Fastening System) anchor sets.

The railway line accommodates an increase in container traffic and free up capacity on the suburban rail lines to decongest the road network. Earlier Belgian rail infra projects for which Infrabel and edilon)(sedra cooperated are the Schumann tunnel in Brussels, Central Station of Antwerp, and Diabolo tunnel in Zaventem.




Drawing of the “glued in” anchor as installed in the Liefkenshoektunnel

Drawing of the “glued in” anchor as installed in the Liefkenshoektunnel

Successful start Innotrans 2014

Very successful start of trade fair: edilon)(sedra at InnoTrans 2014

edilon)(sedra is making a very successful start at Innotrans in Berlin, one of the worlds largest rail trade fairs. The experts of the sector are informed about our forward-looking, innovative rail track systems. edilon)(sedra unites economic efficiency with safe, durable and environmental friendly systems and thus contributes positively to the sustainable development of rail track systems.

Interested expert visitors make use of the possibility of exploring state-of-the-art large scale models, such as edilon)(sedra ERS (Embedded Rail System) and edilon)(sedra EBS (Embedded Block System). Moreover, it is possible to watch a selection of interesting edilon)(sedra projects movies on one of the largest videowalls of the trade fair.

Innotrans edilon)(sedra stand_1 Innotrans


Welcome to our new website!

We are excited to announce the launch of our newly designed corporate website, which is live today, Monday the 15th of September 2014!

The site’s homepage welcomes you with a clean uncluttered design and content focused on our mission to provide you with the most accurate information and share our knowledge and expertise in the field of rail track systems.

The website offers you all kinds of improved functionalities and fast access on smart phones and tablets. A broad range of edilon)(sedra cases, brochures and leaflets can be downloaded from the site. We first launch the website in English. Soon the other language ​pages will be added​.

If you experience any problems using the new website or if you have any suggestions, please contact us.

Marketing team edilon)(sedra

Best system for both worlds

An important activity for edilon)(sedra is to provide technical solutions for ‘in street’ and tunnel tracks. The basis of these solutions is our edilon)(sedra ERS (Embedded Rail System) which is a robust and proven ballast free system with flexible application options for both light and heavy rail. read full article>>