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Drainage geocomposites

The gravel has been used from the first Century before our era like a drainage system. Is an efficient drainage system but there are also many disadvantages such as transport (voluminous material and limited resources) and installation costs.

It has been observed a considerable increase in using geosynthetics materials in civil engineering from all over the world. So that it was developed a new drainage system: Drainage geocomposites composed from a drainage geonet with one or two thermal-bonded geotextiles on one or both sides with specific functions of filtration, drainage and separation.

The specific functions of the geocomposites are: filtration, drainage, separation and protection for the waterproofing layer against possible damages.


  • Protection:The drainage geocomposites provides an effective protection for insulated coverings or   waterproof materials (membrane, paint, bentonite mattresses etc.) for embankments and constructions (heavy vehicles traffic, compaction processes and so on).
  • Filtration: Nonwoven geotextiles perfectly filter the fluids, stopping the passing of fine materials and preventing clogging of the collecting pipes.
  • Drainage: The geocomposites have high capacity drainage even on slopes with small inclination and when are tried to hard loads.
  • Waterproofing: Some geocomposites contain a sealant film, adding the waterproofing function to that mentioned above.
  • Separation: The geocomposites include one or two geotextiles whose role is to separate different types of natural or geosynthetic products.


  • high drainage capacity even on slopes with small inclination and when are tried to hard loads.
  • high wear resistance that allows it to act at great depth without diminishing the performances.
  • tensile strength.
  • excellent performance to compression and flow.


  • Very robust, allowing them to withstand damage during installation
  • Lightweight and flexible.
  • Easiness in transportation and storage
  • Capacity of isolation between structure and ground
  • Durables
  • Non-fragile
  • Chemically inert
  • Resistance to microorganisms
  • Resistance to oxidation
  • Resistance to atmospheric agents
  • Resistance to salt water


Drainage geocomposite

Is the traditional system

The drainage geocomposite is chosen using technical studies demonstrating that you will be able to eject 1.5 times more water than the traditional solution.

High transport costs (bulky materials)

Its installation is difficult and expensive (heavy materials)

A product easy to be transported and stored


Labor achieving affects the infill material compacting because gravel it's a non-cohesive material.

An economical product easily and quickly to install (because it is light and flexible). Increases the performance of the layers all over the area. Increased installation performance.

Gravel is not uniformly distributed over the surface (heterogeneous properties)

The product is spread out all at once, without interrupting the compaction of the filling material.

Gravel can damage structures and waterproofing systems, thus requiring protection for elements (geotextiles)

Is a material with homogeneous properties, in contrast with gravel

Gravel produce useless pressure on concrete or municipal   wastes (in case of landfills)

The drainage geocomposite incorporates the protection and separation functions without the need of new
Geocomposites are easy and don’t cause overloads.

Environmental problems: it is a valuable, rare, expensive product

Without environmental problems: polypropylene and polyethylene are not harmful, don’t pollute and are 100% recyclable

A more expensive solution

Savings of at least 60% compared to traditional drainage


Vertical drainage

  • Retaining structures
  • Abutment bridges and other structures
  • Vertical structures
  • Retaining structures of reinforced soil
  • Permanent closure
  • Expansion joints

Horizontal drainage

  • Foundations
  • Open spaces drainage
  • Terraces
  • Green spaces (gardens, golf courses)
  • Backfills drainage
  • Drainage of road and rail beds
  • Trams
  • Underground parking