Questions You Should Know about Uniaxial Geogrid

Currently there are three categories of geogrids available:

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The first, and &#;original&#;, geogrids are commonly referred to as &#;punched and drawn&#; geogrids.

A sheet of either HDPE or Polypropylene has holes punched into it in a regular pattern and the sheet is then &#;drawn&#; or &#;stretched&#; into the finished product. The drawing is done under controlled conditions of temperature and strain rates to avoid fracture whilst allowing ductile flow of the molecular chains. This operation aligns the molecular chains in the direction of drawing to convert low-strength polymer into high-strength grids.

The second category of Geogrids is &#;coated yarn&#; types. They are, in fact, technical textiles in the form of grids and use bundles of fibres (most commonly Polyester) as the reinforcing component that are then coated to provide protection during installation and in service. The grid structure is formed by knitting or intertwining the transverse and longitudinal bundles of fibres.

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The third category of Geogrids is made by laser or ultrasonically welding together polyester or polypropylene rods or straps (as used in packaging/shipping) in a gridlike pattern.

Geogrids are polymeric (plastic) construction materials used to confine and stabilize granular fill materials to increase their load distribution capabilities while reducing its potential to deform under load. Geogrids have openings called apertures, which allow for rock particles to strike through. This action is known as particle interlocking, and it allows for rock to become confined within the aperture.

Geotextiles are construction materials made from woven or non-woven polymeric (plastic)  fibers. They can be used to provide filtration and separation, which restrains soil from mixing with adjacent materials due to dynamic forces. Geotextiles cannot confine granular fill materials, since there are no apertures to achieve particle interlocking.

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