NONWOVEN GEOTEXTILES

COASTS AND RIVERBANKS

It is a non-woven geotextile made by high tenacity polypropylene staple fibres, needle-punched and/or thermocalandered, without resins or glues, UV stabilized. It is not toxic and does not pollute the environment. It is resistant to alkalis, acids and organic substances. Moulds, rodents and microorganisms cannot attack GEO. Its qualities and properties are not substantially modified by climatic factors like frost, heat, humidity etc.

TECHNICAL FEATURES

  • USE: as separation and filtration layer.
  • INSTALLATION: in the erosion control works of coasts, riverbanks, canals, between the base soil and the permeable revetment (rock blocks, rip-raps, gabions).
  • REFERENCE STANDARD: EN 13253 (Geotextiles and geotextile-related products. Characteristics required for use in erosion control works (coastal protection, bank revetments).
  • RELEVANT CHARACTERISTICS: tensile strength, static and dynamic puncture resistance, permeability normal to the plane, characteristic opening size, durability.
  • RECOMMENDED PRODUCTS: to be chosen according to the characteristics of subsoil, to the type of revetment blocks, and to the dropping height of blocks installed on the nonwoven. For example, with dropping height over 1 m and a weight of blocks over 1000 – 15000 – 2000 kg respectively, GEO PP AG 500 – 600 – 700 g/m2 should be used.

UNIT WEIGHT: 500 - 700 g/m2
ROLL SIZE: max roll width 650 cm

In our internal laboratory the mechanical and hydraulic characteristics of the final product are tested, as well as the quality of the fibre.

FUNCTIONS

SEPARATION

FILTRATION

APPLICATIONS

LAYDOWN AND USEFUL SUGGESTIONS

Just like all materials for Civil Engineering, non woven geotextiles should be handled, stocked and transported with appropriate care in order to avoid alteration of characteristics required for each job. Hereunder some suggestions about handling, stocking, transportation and installation.

SITE PRELIMINARY WORKS
Soil must be duly prepared and sharp stones removed before laying the geotextile. During the laying the non-woven is subjected to different mechanical stress, according to the characteristics of soil, covering material and method used for laying down and compacting it. The mechanical characteristics of the non-woven have to be always selected in accordance to the specific conditions of installation.

OVERLAPPING

The overlapping is connected to different possible situations:
At least 30 cm when the soil is solid enough;
At least 50 cm when the soil can be easily deformed;
At least 50 cm for the protection of waterproofing sheets;
At least 1 m in case of underwater installation.

 

UV PROTECTION
GEO® is produced from synthetic fibres, consequently is subject to ageing due to long exposure under UV rays. .

 

COLD TEMPERATURE IS NOT A PROBLEM
Low temperatures do not affect the characteristics of geote
xtiles.

 

CARE ABOUT HIGH TEMPERATURES
High temperatures might affect the characteristics of geotextiles. Keep the supplier informed about how you intend to use the material, in order to get the suitable type.

For loading/unloading operations a frontal-loader with long stick or long shovels is necessary.
Stick or shovels should be at least 2/3 of the width of roll, in order to avoid damages to the carton/plastic core of roll.
In case above equipments cannot be used (it may happen on a site), ropes, chains and earth-moving machines may be used.

 

Rolls of GEO have a carton/plastic core inside and are externally protected by a foil of LDPE. Under these conditions the rolls can be stocked in open air space, without any relevant variation of the original characteristics. The ideal situation is however a covered stock area.

In case above indications cannot be followed, to protect rolls from contamination, UV rays, humidity etc, we suggest:

- To avoid direct contact between the soil and the rolls, especially when they are not used in a short time;

- To cover the rolls with a resistant and dull PE sheet;

- To ask supplier for having a suitable packing.

 

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NONWOVEN GEOTEXTILES
NONWOVEN GEOTEXTILES

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