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GEOTEXTILES

    WHAT ARE GEOTEXTILES?

    Laminated, flexible, and porous textiles primarily made from Polypropylene or Polyester, consisting of polymer fibers bonded together through weaving, needling, or heat-setting. Designed with specific strength and porosity characteristics, they are used to address various geotechnical issues related to filtration, drainage, protection, stabilization, reinforcement, and soil separation. 

    Significant technical specifications of geosynthetics

    Manufacturers and designers adhere to what is established by the Geosynthetic Institute (GSI) in its GRI specifications:

    GT-12 Geotextiles as cushion.

    GT-13 Geotextiles for separation, as well as those established by the American Association of State Highway and Transportation Officials (AASHTO):

    M288 - 05 Geotextile Specification for Road Application.

     

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    Advantages for Geotextiles

    • They increase the project's lifespan.
    • They enhance the mechanical and hydraulic properties of the soil.
    • Reduced cost per material movement.
    • Low labor cost; quick installation, no need for skilled personnel.
    • Panels can be sewn prior to installation.

    How Are Geotextiles Used Today?

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    Separation

    They prevent migration and mixing of coarse materials with fine materials.

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    Reinforcement & Stabilization

    They add tensile stress to soft soils, thereby increasing their bearing capacity.

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    Filtration

    They retain soil particles with diameters larger than their pores, allowing water to pass through

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    Drainage

    They evacuate water and gases from the underlying soil through their plane, preventing damage from the pore pressure they generate.

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    Protecton

    Buffers/avoids direct contact with a surface

    APPLICATIONS OF GEOTEXTILES

    • Communication routes

    • Foundations

    • Embankments

    • Retaining walls

    • Pavements

    • Green walls and roofs

    • Tunnels

    • Sports fields

    • Sports courts

    • Entertainment centers

    • Landfills

    • Containment of industrial waste

    • Leachate pads

    • Gabions

    • Geotextile containers

    • Erosion control

    WOVEN GEOTEXTILES

    They are manufactured from monofilaments or multifilaments. The fibers are oriented in two directions, the warp threads, which run parallel to the length of the geotextile panel (machine direction), interlace with weft threads, which run perpendicular to the length of the panel. This allows for a material with high strengths and moduli in both warp and weft directions, and low elongations.

    Physical characteristics

    Colors: Black and black with white.

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    NON WOVEN GEOTEXTILES

    They are manufactured either from continuous filaments or from staple fibers. The fibers are generally randomly oriented within the plane of the geotextiles, but preferential orientation can be achieved.

    In the spunbonding process, the filaments are extruded and laid directly onto a moving belt to form the web, which is then bonded either by heat or by needling, where the fibers are mechanically entangled.

    Physical characteristics

    Colors: Black, white, green, gray.

    Typical Applications:

    • Subgrade protection for geomembrane

    • Cover soil cushion for geomembrane

    • Soil stabilization

    • Road construction

    • Erosion control

    • Filtration

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