BETEX TP Non-woven Fabrics

The range of applications for non-woven geotextiles in construction is as wide as the range of structures in which they are used. Non-woven fabrics are the archetypal geosynthetic.

Depending on the structure and composition of the fabric, they can be used as a filtering, separation and/or protective layer in highway construction, buildings, civil engineering, gardens and landscaping. The mode of operation is always similar, but the requirements of different construction projects can vary considerably.

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Your advantages

Good mechanical and hydraulic filtration properties

Excellent chemical resistance

Good adaptability

Easy to install

General

BETEX TP is a mechanically-bonded staple fibre non-woven geotextile made of polypropylene (PP). This polymer has high chemical resistance, even to aggressive media such as soils with a high pH value. The raw material polypropylene is easy to process and, as a result of its high elasticity, is also extremely flexible without any associated loss in robustness.

BETEX TP Non-woven Fabrics can thus be used to clad even complex shapes to excellent effect. The exceptionally wide range of BETEX TP Non-woven Fabrics allows them to be used in practically all types of application.

Functions

Separation

trennen BETEX TP Non-woven Fabrics can be used to separate two different types of soil or unbound sub-base layers from each other. This separation is extremely important, for example, in cases where the subgrade soil must be prevented from mixing with a high-quality sub-base layer. By separating the layers, the quality of the layer structure can be sustained in the long-term and the useful life of the structure can be optimised.

The separating function of the fabric often means that a blinding layer can be omitted.

Filtration

The filter function of the non-woven fabric must be tailored to the particular circumstances, depending on the grain mobility within the soil and the influence of water on the layers to be separated. In simple cases, such as those assumed in M Geok E StB 2016 (Leaflet on the use of geosynthetics in earthworks for highway construction), BETEX TP Non-woven Fabrics provide the necessary mechanical and hydraulic filtration. For more complex applications, the ideal product can be selected from the BETEX TP product range after determining the filter requirements and taking into account the characteristic aperture width, the water permeability and possibly also the filtration length. In general, the functions of separation and filtration complement each other, and this dual function is often a prerequisite in geotechnical applications.

Protection

The protective function of the fabric can be considered in isolation from the two functions described above. In this case, the purpose is to protect a structure or another functional component, such as a sealing membrane, from mechanical damage. Such protection may be required, for example, when concreting or when positioning coarse-grain mineral construction materials. Here, BETEX TP Non-woven Fabrics provide the necessary protection. They can minimise the effects of point loads and absorb shear forces.

Our BETEX TP Non-woven Fabrics are available in various thicknesses from 2.3 to 12 mm to provide the required level of protection for an extremely wide range of applications.

Applications

BETEX TP Non-woven Fabrics are used as separating and filtering layers in situations where soil and mineral fill materials need to be effectively separated in order to prevent the migration of particles and the formation of unstable interfaces.

Separation and filtration in traffic infrastructure

Block paving
Bedding for paving
BETEX TP Non-woven Fabric
Base course

Separation and filtration layer for green roofs

Vegetation
Substrate
Drainage membrane
Root-proof membrane
BETEX TP Non-woven Fabric
Roof sealing membrane

Drainage layer for slopes (perforated pipe)

Topsoil
BETEX TP Non-woven Fabric
Seepage water
Free-draining fill material
Partially perforated pipe
Sealing membrane, if required

Separation and filtration layer for drainage systems

Soil and vegetation
Sealing membrane
Free-draining fill material
Partially perforated pipe
BETEX TP Non-woven Fabric

Filter layer behind gabions

Backfill material
BETEX TP Non-woven Fabric
Gabions
Drainage pipe

Data

Properties	TP 15	TP 17	TP 30	TP 40	TP 50	TP 80
Product type	Mechanical bonded nonwoven
Raw material	Polypropylen (PP) white
Geotextile robustness class (GRK)	3	3	4	5	5	5
Mass per unit area (g/m2)	150	170	300	400	500	800
Thickness (mm)	2,3	2,6	3,5	4,3	5,0	6,5
Areas of application
Building protection				○	○	○
Roof greening	●	●	●	●	●	●
Landfill construction and contaminated sites			●	●	●	●
Drainage systems			●	●	●	●
Green areas	●	●	●	●	●	●
Home gardens	●	●	●	●	●	●
Retention basins			○	○	○	○
Reservoirs			○	○	○	○
Ponds			○	○	○	○
Underground car park greening	●	●	●	●	●	●
Road construction	●	●	●	●	●	●

● suitable | ○ partly suitable (project-related assessment necessary)

Special types available on request.

Request further product information

Installation

The subsoil should be as flat and even as possible in order to ensure full contact with the fabric across its entire surface.
The fabric must be laid flat and free of creases. Creases resulting from the shape of the structure should be removed by cutting the fabric and allowing it to overlap like roof shingles.
Fill material must be placed on top of the BETEX TP Non-woven Fabric on the day that the fabric is laid.
When filling and compacting material on top of the fabric, care must be taken to prevent displacement or creasing of the fabric.

Our detailed installation and laying instructions for BETEX TP Non-woven Fabrics must also be followed.