XiTRACK Procedure

XiTRACK Ltd provides a design, supply and supervisory service. 

A problem site is quantified by careful assessment followed by monitoring of its static and dynamic track performance. Site information (including site physical data and maintenance history) is collected in sufficient detail so that the site can be mathematically modelled to determine the nature and source of the problem and the required type and location of the XiTRACK Polymer treatment.  The polymer properties are selected to match the predictive models' output and are tailored to its requirements; a wide range of parameters can be varied which are translated into the performance of the XiTRACK GeoComposite.  A range of outline solutions is then prepared for costing purposes. 

One of these options is then selected by the client and a detailed designed solution (including any pre-preparation of the site and weather shielding) is drawn up and the polymer requirement, both in terms of physical properties and topographic distribution, is defined.  If specified, the XiTRACK design is submitted to our external checker, Faber Maunsell.  The polymer treatment by an approved applicator using specified mixing equipment is usually supervised by XiTRACK Ltd; some time afterwards the site is re-monitored to confirm that the treatment is performing to specification.  Factors outside the control or scope of the XiTRACK treatment itself may mean that minimal post-fitting re-alignment or geometry correction may be necessary for a short period.

Special attention has been paid so that the XiTRACK treatment can be carried out in a wide range of temperature, weather and ballast conditions; it leaves the track fully draining.  The track and ballast are preferably pre-prepared by conventional techniques to ensure optimum performance and alignment.  XiTRACK Polymer is fast reacting and the site is quickly returned to operational use.  After application, it allows the ballast to move in a controlled manner but minimises its migration, GeoComposite performance can be verified by on-site monitoring and comparison with the mathematical models.

The XiTRACK Process is typically suited to track with poor alignment-retention history.  It reduces or eliminates the costs of frequently maintaining it, for example high-speed turnouts, curves, wet-spots, and sections where ballast memory is a problem and becomes degraded.  It is particularly effective in areas of poor vertical track stability.  It can be used to help overcome the problems associated with resonant structures and especially on transitions of any type.  It can be designed so that conventional maintenance techniques can continue to be used after application. In all cases it contributes considerably to track safety.