Product>Geogrid

Geogrid

  • Geogrid is plastic polymeric material drawn into rectangular or square grid-like configuration. it can be classified into two types by the way they are drawn: uniaxial (or unidirectional) drawing and biaxial (or bidirectional) drawing.
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    insights of plastic geogrid

  • geogrids is produced by extruding polymeric materials (mostly polypropylene or high-density polyethylene) into sheet, punching a pattern of holes in the sheet, and heating and stretching the punched sheet in predefined direction(s). Unidirectional geogrids are only drawn longitudinally while bidirectional geogrids are drawn longitudinally and then transversely
  • The polymeric macromolecules are reoriented and rearranged with increased binding strength along the molecular chain when the geogrid is being heated and drawn. Consequently, overall strength of the material is improved. The ductility of the drawn polymer sheet is about 10%-15% that of the original one. With carbon black added into the polymer, a geogrid will have better durability as carbon black can improve the product’s performance in aid-resistance, alkali-resistance, erosion-resistance and anti-aging.
  • What is uniaxial geogrid? A uniaxial geogrid is made with HDPE (high-density polyethylene) and produced by extruding the material into thin sheet, punching a regular pattern of holes in the sheet, and drawing it longitudinally.

    What are the characteristics of uniaxial plastic geogrid?

    1. The polymeric macromolecules, regularly oriented and linearly arranged, are formed to elliptical grid-like integral structure with high node strength. Such a structure has high tensile strength and high stiffness. Therefore, it is an ideal product for load support and stress distribution in soil-reinforcement applications.

    2. Unidirectional plastic geogrids have a unique characteristic of small creep deformation under long-time permanent load, with much higher creep strength than geogrids made with other materials, and thus can increase the lifespan of engineering works.

    3. Geogrids are interlocked with soils to form an effective stress distribution mechanism. In other words, a concentrated load can be quickly and effectively distributed to a large area of subsoil and thus the local stress is reduced.

    4. Engineering applications of uniaxial plastic geogrid:

    5. Unidirectional plastic geogrid is a high-strength geosynthetical material, widely used in such applications as river embankment, tunnel, dock, road, railway and buildings.

    1. What is biaxial plastic geogrid?

    A biaxial plastic geogrid is made with PP (polypropylene) or PE (polyethylene) and produced by plastifying and extruding the material into sheet, punching a pattern of holes in the sheet, and heating and stretching the punched sheet longitudinally and transversely.

    2. What are the characteristics of biaxial plastic geogrid?

    biaxial geogrid has high tensile strength both longitudinally and transversely and are an ideal product for load support and stress distribution in soil reinforcement applications,especially large foundations requiring permanent load support.

    3. Engineering applications of biaxial plastic geogrid

    biaxial plastic geogrids are suited to reinforcement of foundations requiring permanent load support, such as river embankment, road subgrade and side slope, tunnel wall, airport, parking lot, and dock.


    geogrid state technical standard

    PP uniaxial geogrid Specification(GB/T17698-2008)
    Specification Tensile strength
    kN/m
    Tensile strength at
    2% elongation
    kN/m
    Tensile strength at
    5% elongation
    kN/m
    Nominal longation
    %
    Products in the range of coal mine
    Fire out time from outer flam(S) Surfacs resistivity(Ω)
    TGDG35 ≥35.0 ≥10.0 ≥22.0 ≤10 ≤3 <1×109
    TGDG50 ≥50.0 ≥12.0 ≥28.0
    TGDG80 ≥80.0 ≥26.0 ≥48.0
    TGDG120 ≥120.0 ≥36.0 ≥72.0
    TGDG160 ≥160.0 ≥45.0 ≥90.0
    TGDG200 ≥200.0 ≥56.0 ≥112.0
    TGDG260 ≥260.0 ≥73.0 ≥146.0
    Note:The above table is referring to GB/T17689-2008.MT141-2005 Standard.Special sizes are aVailable at cusomer's request.
    PP uniaxial geogrid Specification(GB/T17698-2008)
    Specification Tensile strength
    kN/m
    Tensile strength at
    2% elongation
    kN/m
    Tensile strength at
    5% elongation
    kN/m
    Nominal longation
    %
    Products in the range of coal mine
    Fire out time from outer flam(S) Surfacs resistivity(Ω)
    TGDG35 ≥35.0 ≥7.5 ≥21.5 ≤11.5 ≤3 <1×109
    TGDG50 ≥50.0 ≥12.0 ≥23.0
    TGDG80 ≥80.0 ≥21.0 ≥40.0
    TGDG120 ≥120.0 ≥33.0 ≥65.0
    TGDG160 ≥160.0 ≥47.0 ≥93.0
    TGDG200 ≥200.0 ≥70.0 ≥140.0
    Note:The above table is referring to GB/T17689-2008.MT141-2005 Standard.Special sizes are aVailable at cusomer's request.