In most cases, this is actually true. Generic stone wool is not suitable for railways. However, our version – Rockdelta stone wool resilient mats – are engineered expressly to meet the extreme demands of railway applications. Today, they are the leading performer in their class. Rockdelta stone wool resilient mats are the only mineral fiber material proven through experience and testing to be suitable for controlling ground borne noise and vibrations in railway applications.
The cornerstone of the performance of Rockdelta stone wool mats is their stiffness. The mats are produced with up to 10 times the density of regular stone wool products used in thermal insulation applications. This is critical when you consider that, at any given time, a typical rail structure has to support different kinds of rolling stock – from tramways and light rails, all the way to freight and heavy tonnage trains. In addition, when used for ballasted tracks, our products are manufactured with a dual density. This means that the resilient mat will have an upper layer with higher puncture resistance for the side in contact with the ballast. The lower layer provides the desired elastic properties of the resilient mats. This makes them highly effective for both controlling vibrations and protecting the track infrastructure.
To ensure that the mats provide the desired performance from the moment they are installed through to the end of their lifetime, each mat will undergo a unique ageing process so that they perform consistently from day one. Finally, since it is a stone wool-based material, the resilient mats have outstanding fire resistance, are safe for humans and the environment and have a high degree of material stability.
Outstanding track protection with stone wool mats
Rockdelta is the world’s leading technology in stone wool resilient mats for tracks. Rockdelta is a product line of Lapinus, part of the ROCKWOOL Group. ROCKWOOL is the worldwide market leader in stone wool-based solutions and operates 46 plants in 39 countries. The company is dedicated to continually finding and engineering new sustainable stone wool solutions for global challenges. Best known as firesafe insulation material, ROCKWOOL stone wool nowadays has many other and sometimes surprising fields of application. ROCKWOOL has five brands that are responsible for the commercialisation of these products. Lapinus is the dedicated brand for specially engineered solutions and obviously that is why Rockdelta fits in its portfolio perfectly.