bidim®

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.

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.

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.

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 containment applications to prevent damage to the underlying liner. 

Nearly every road built today uses a nonwoven geotextile 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 bidimensional 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.

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.  

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.

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. 

For small residential, plumbing and landscaping drainage and filtration applications we recommend the use of our Filterwrap product.

Filterwrap is supplied in small easy to handle roll sizes and is designed to replace natural filters in many applications particularly revetments and subsoil drainage. The extremely high porosity of nonwoven geotextiles allows water flow while preventing fines migration. These properties allow Filterwrap to be used where drainage or control of groundwater is a concern such as behind retaining walls, working over soft ground in driveway construction and gravel paths or in landscaping applications to provide separation between soil and drainage aggregates in planter boxes and roof gardens.