Geogrid vs Geotextile
While you’ll find the two in civil engineering in pretty much the same applications in the main highways, on slopes and in retaining structures and so on, they vary widely in how they work and indeed function.
Grasping the difference between the two means you can choose wisely and that pays off in terms of performance in the work and economy.
Geogrid
“A geogrid is a polymer or fiberglass based grid that has a regular open grid or mesh pattern” is how our buddy on geotextile.com introduces it.
“The primary function of geogrids is reinforcement where they work simply by interlocking with other aggregate and/or soil materials. When the load is applied the geogrid distributes the stress over the wide area of the base thus giving greater stability to the base layer.”
Common Types include: Uniaxial geogrid; Biaxial geogrid; Triaxial geogrid; HDPE Geogrid; PP Geogrid; PET Geogrid; Fiberglass Geogrid…
Geogrids Are Used For
Road base reinforcement. Subsequent loading of base materials in areas of stabilisation work. Soft soil stabilisation. Retaining wall systems; Embankment reinforcement; Steep slope protection and, on general land reclamation projects etc. etc etc. Geotextile
“A geotextile is a permeable textile membrane from [generally] polypropylene (PP) or polyester (PET)” Greg tells us.
“Unlike geogrids they exist as continuous sheets and blankets and do not exhibit open grid structures. They serve principally the functions of separation, filtration, drainage and protection.“The term may be used to describe all geotextiles or geotextile products not otherwise classified here; non-woven geotextiles, woven geotextiles, needle-punched geotextiles“Typical Uses Include: Separation layers, Road drainage, Erosion control, Landfill protection, Erosion control, Railway and embankment filtering layers. The Biggest Difference, That Is The function itself, is Different for both. Simply put, geogrids are meant to support and distribute loads, and geotextiles are meant to provide a barrier, and filter through it.
In brief: Geogrid = strength Geotextile = separation and filtration Both are obviously different, but used hand in hand often”.
Geogrids Geogrids can be made of a number of materials: high-density polyethylene; HDPE, polypropylene; PP, polyester; PET,”A geogrid is a rectangular grid made from high-tensile plasticsheet material”.
Example uses:
Road embankments Erosion control Foundation stability and load bearing”.
Geotextiles Geotextiles can be made of polypropylene, PP, woven fabrics of polyester or PET.
Example uses: “Surveying to locate an underground scour hole Protect against soil erosion Airlift and mechanically pump beaches from off-shore dredging operations”and geotextile, landcape intertitiallyDeposit and dredge sands, etc.”.
Practical Geogrids and Examples: Being versatile and with a good working life 5 to 25 years, they can be used for:
Separation and stabilisation of road construction sites for construction of roads over weak subgrade soils and fill platforms to reduce fill consumption and the depth of filling and prevent future settlement; ie. they can establish a roadbed.
At waste disposal sites to allow passage of heavier trucks, separation, act as filter and stabilise.
Foundations and total elevations with the inclusion of necessary bedding”.
Stabilise side slopes of earth dams and embankments in general”, a great many opening for builders”.
“Road following land reclamation of sludge and stiff brown clay at a landwidth of 6 yards, boundary of road facing, first in total earthworks and second in lowered excavation level of some 18 – 24 inches before reaching good natural materials, and fill in process. Geotextiles are used at land/camping and the joining point with the first layer filled in with:(and geotextiles for filter cloth)”.
“Transport dangerous materials; protects tube and fabric”.