bidim nonwoven geotextiles provide an effective, economical solution to a range of engineering problems including weak soil, rutted and cracked roads and liquid and gas leaks from landfill sites. All bidim nonwoven geotextiles are manufactured in Australia to ISO 9001 standards and are supported by a rigorous MQA process as well as being designed to meet the requirements of Australian and New Zealand road authorities.

Function

bidim nonwoven geotextiles provide excellent filtration and features a strong three-dimensional structure with high elongation. bidim nonwoven geotextiles also have a high melting point and high UV resistance.

Drainage

bidim nonwoven geotextiles have a three-dimensional structure designed to improve drainage performance. Ideal for use in subsoil drainage systems, bidim will assist in the removal of water from road and railway works, sports fields and behind retaining walls.

Separation

bidim nonwoven geotextiles are used in the construction of roads, railways and embankments where the ground is soft and unstable. Using a layer of geotextile to separate the soft ground from the fill material will reduce the amount of fill required, increase the life span of the road or rail structure and cut long-term maintenance costs.

Filtration

bidim nonwoven geotextiles are highly porous, allowing water to pass through while preventing soil migration. When used in revetment and subsoil drainage projects, bidim geotextiles are more cost effective than natural filters.

Protection

Using heavyweight bidim nonwoven geotextiles in landfills extends the life of the lining system by protecting it from punctures and excessive deformation. The geotextile acts as a cushioning and stress relieving layer, minimising the chances of leakage in the long term. Needle free bidim geotextiles are commonly specified in landfill and containement applications ot prevent damage to the underlying liner. 

Applications

Roads

Nearly every road built today uses a nonwoven geotexile such as bidim, to provide separation and filtration under the road formation. The ingress of water into road pavements poses the most significant damage potential to any road; therefore rapid removal of this water is of the utmost importance. bidim is the only bidemnsional geotextile on the market today - meaning it has the same strength properties in both directions. 

Standard road construction practice requires the inclusion of road edge drainage systems which incorporate geotextiles; in order to optimise performance of these drains a geotextile with high flow rates is desirable. The three dimensional structure of the nonwoven geotextile provides numerous flow paths, with the result that bidim geotextiles allow water to flow at rates which exceed most natural materials it is placed in contact with.

Rail Formation

bidim geotextiles are commonly used in the rail sector to separate the capping layer form the ballast layer, providing separation and filtration. The rail industry typically demands bespoke bidim grades due to the nature of their aggregates and applied loads.  

Embankments

High quality fill material can become contaminated when it is placed directly in contact with a soft or poor quality ground; the result being a loss of performance of the fill material. In order to limit the contamination and subsequent strength loss, geotextiles are used to separate the two distinct materials. Construction in this environment can place the geotextile separator under high stress with forces from rock placement and equipment loads needing to be transferred into the poor quality material. bidim geotextiles are ideal for this application as it combines high elongation with high strength to provide unsurpassed toughness and survivability characteristics.

Liner Protection

Heavy duty geotextiles are used to prevent damage to impermeable liners designed to contain harmful liquors in landfill and mining applications; the design of the liner system needs to limit the chance of punctures during installation and reduce the risk of long term stress cracking of the geomembrane. Research has shown that bidim geotextiles can significantly reduce forces placed on the impermeable liners, protecting them in both the short and long term. Needle free bidim is commonly specified in liner protection applications to help prevent damage to the liner from damage. 

Advantages

  • The incorporation of bidim geotextiles reduces the need for quarried fill materials and reduces construction times.
  • Tightly rolled wide rolls can result in significant transportation cost savings.
  • Local production of bidim allows full QA traceability of every roll, with many customers auditing our local production facilities.
  • Needle free bidim geotextiles provide designers and installers in the waste and containment sectors with confidence that their liner will not be damaged.
  • Local UV testing conducted over many years, which important as we have one of the most extreme UV environments in the world.
  • Centre of Excellence research and testing into use of bidim as a cushion layer, yielding savings to contractors and asset owners. 
  • Local production of bidim allows for production of project specific grades or roll dimensions.
  • Complies with all road, rail and landfill authority specifications.
  • Local stock holdings ensure we have the right product in the right place at the right time.

Installation

bidim geotextiles are supplied fully wrapped in rolls up to 6m in width to minimise wastage and laps. Installation can be assisted with the use of a Geofabrics supplied spreader bar. For more detailed installation instruction refer to our comprehensive Storage & Installation Guide.

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