P&P Plastics pty Ltd^

EnviroFIX Dam Lining System

EnviroFix Thermal Lock Geosynthetic Clay Liners 9GCL’s) are needle punched reinforced composites which combine two durable geotextile outer layers with a uniform core of natural sodium bentonite clay to from a hydraulic barrier.

The sodium Bentonite clay utilised in EnviroFix Thermal Lock is a naturally occurring clay mineral that swells as water enters between its clay platelets. When hydrated with confinement, the Bentonite swells to form a low permeability clay liner with the equivalent hydraulic protection of approximately one meter of compacted clay.

EnviroFix Thermal Lock is produced by distributing a uniform layer of the sodium bentonite between two geotextiles. Fibres from the upper nonwoven geotextile are then needle punched through the layer of bentonite and incorporated into a lower geotextile (either a woven or nonwoven/woven composite). This process results in a strong mechanical bond between the fabrics.

A proprietary heat treating process – the Thermal Lock process is then used to modify and more permanently lock the needlepunched fibres into place. Unique properties including increased internal shear resistance an long term creep resistance, result from this procedure.

Installation Basics

  • To install EnviroFix a steel bar is inserted through the core and the roll is suspended from a loading frame. The roll is then either unrolled, or the free end is secured in an achor trench and the suspended roll is slowly backed away.
  • A clearly marked overlap-line is indicated on each panel edge to facilitate the correct overlap width.
  • No special tolls are required to cut EnviroFix. A utility knive is all that is needed to cut the panels into any configuration.

GCLs must be properly confined by a minimum cover soil layer before being allowed to hydrate fully.  Please see detailed installation guide for more details.

EnviroFix Installation Guidelines