10 Questions You Should to 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.

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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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What Are Geogrids?

Geogrid Solution Overview

Before we define what a geogrid is, let's take a look at the larger category of geosynthetics. A geosynthetic is a synthetic product, usually made from or including polymeric materials, that is used to solve civil and geotechnical engineering problems in or on the ground. Geosynthetics add to or enhance the functions of conventional materials to make construction more efficient, cost-effective, and reliable. Designs using geosynthetics should be based on the function(s) of the selected materials to meet the engineering objective(s).

Geogrids were invented by Tensar in the late s and are a category of geosynthetic material that can be used to provide the functions of reinforcement, stabilization, and filtration.

All Geosynthetics Are Not Created Equal

Tensar geogrids have been tested extensively to ensure long-term performance and value.

Your reputation is at stake any time your stamp is used on a design. At Tensar, we don't take this lightly. That's why we have invested extensively in research and testing for all of our geogrid applications, proving their design and performance parameters time and again. You can use your stamp with confidence every time Tensar geogrids are specified in a design. Don't risk using products with unproven technologies.