- What is TrackTex
- Mud Pumping
- Proven Performance
- About Us
- Contact Us
While mud-pumping affects probably less than 10% of track renewal sites the renewal costs for those sites is proportionally much higher as they required deep excavation and installation of additional granular layers. Since the 1970’s British Rail Engineers had been investigating ways to use geotextiles to reduce the cost of treating mud pumping.
By the 1980’s geotextiles were successfully used to reduce the thickness of sand blankets, but could not completely remove the need for imported aggregate as the pore size of the geotextile alone was too large to prevent migration of fines. Impermeable layers, also known as waterproofing, had also been trialed. While they prevented water penetrating down and slurry moving up into the ballast it was found that by not allowing the water to leave the slurry the subgrade was weakened in any case.
In the late 1990’s and early 2000’s GEOfabrics became heavily involved in research to develop a new kind of geosynthetic composite which could act as a waterproof barrier to rainwater while also allowing pore water in the slurry to escape, with enough robustness to endure the abrasion in aggressive mainline trackbed environments. This meant significant investment into wide width lamination production facilities and full scale testing rig.
Following more than a decade of research live site trials confirmed the laboratory findings that TrackTex was a viable alternative to using sand blankets. It can facilitate the passage of liquid under pressure, but the pores are such that the passages of clay fines is prohibited. Without pressure, water cannot pass through the filter, therefore any underlying clay formation will, over time dry out and have an improved modulus. TrackTex is also proven to be sufficiently robust to resist installation and operational damage, yet is flexible enough to conform to uneven subgrade formation such that no slurry inducing voids exist.
This unique combination of properties means TrackTex is the most cost effective way of preventing and correcting mud-pumping failure. Fast installation rates reduce construction costs and possession time. TrackTex has been shown to increase trackbed maintenance intervals for pumping failure by over 25 times, providing significant savings over any available alternative.
At GEOfabrics, we provide technical support to help you get the most out of TrackTex and address the cause of mud pumping. This ensures the stability and performance of your tracks. Our team of experts utilizes advanced techniques and technologies to deliver effective solutions tailored to your specific needs