Thermite welding is a technique in which rails with a temperature of more than 2500 degrees are welded together without joints. This is done by means of a bucket containing thermite, a mixture of iron and aluminum powder. The igniter enters the bucket and starts a chemical reaction that connects the rails. Thermal welding is used for welding all types and qualities of rails, including groove rails and crane rails.
The advantage of thermal welding is that the process is standardized and the welder can work efficiently compared to conventional welding techniques. "The advantage of the Pandrol welding packages is that welding is done quickly and in an environmentally friendly way," explains director Mark van den Rijen.
The first system is in a steel bucket which can be fitted with a special filter lid. Van den Rijen: “The thermite is burned in the bucket, creating a lot of smoke. Thanks to the filter, this smoke is trapped and absorbed, making it safer to work. This is better for the health of welders and their colleagues in the track, but also offers benefits when performing work in tunnels, for example. "
Because the sand mold is placed in the bucket in an innovative way, the residue is loose in the bucket after welding, making it easy to separate and the steel bucket can simply reach the old iron. He points out that such seemingly small differences save a lot of time and help to ensure that not too much material is thrown into the residual waste, which is bad for the environment. ”
The second thermal welding system that is being demonstrated is in a cardboard bucket. “The advantage of this system is that almost all material, including the bucket, burns. As a result, you have almost no residual material to remove, which can save a lot of time. Because the bucket is made of cardboard, the system is also even cheaper than systems with an iron bucket. "
“Thermite welding is a standardized process, making it less susceptible to error and thus better safeguarding the quality of the weld. Alom wants to take a new step towards with these products to a safer and more sustainable rail market. ”
ProRail 'experimental garden' with FFU sleepers.
ProRail set up a testing ground in the track between Zwolle and Heino with four different types of alternative, sustainable sleepers. This is a two-year trial in which the applicability of the sleepers is tested and the degree of noise and vibration reduction is also examined.
Pandrol drives greater weld traceability in rail sector.
Pandrol, the market leading manufacturer of aluminothermic welding systems, has released an innovative new app which is specifically designed to improve weld traceability across the rail sector. The app is also available for the Netherlands.
Tracktex, An effective, economical, easy-to-install replacement
‘Tracktex’ is a micro-porous filter sandwiched between two geotextile protectors which, when deployed at the base of ballast, prevents rain water penetrating through to the underlying formation but allows upward movement of water whilst filtering any fine soil particles.
Synthetic Railway Sleepers: Light, durable en strong
Alom offers , along with Sekisui, a Synthetic Railway Sleepers. These synthetic sleepers are produced by compressing single strands of glass fibre with polyurethane foam using a high pressure extraction press. The expected lifetime is more than 50 years.