Geogrid type introduction and basic characteristics

Geogrid is currently a very wide range of reinforcing materials, its types, the main types of unidirectional tensile plastic geogrid, bi-directional tensile plastic geogrid, multi-directional tensile plastic geogrid, bi-directional woven polyester geogrid, bi-directional polyester geogrid, bi-directional welded polyester geogrid, bi-directional welded steel geogrid, bi-directional woven fiberglass geogrid, etc.

1 Stretching also material geogrids

Tensile plastic geogrid generally have unidirectional stretch, two-way stretch and multi-directional stretch plastic geogrid and other forms.

Unidirectional stretch plastic geogrid mainly use high density polyethylene (HDPE) or polypropylene (PP) as raw material, its tensile strength is high, elongation is low, adapt to all kinds of soil, is widely used in recent days - a kind of ideal reinforced material.

Bi-directional plastic geogrid mainly adopts polypropylene (PP) as the raw material, can be used for reinforcing the stress can be evenly distributed in all directions, the integrity is better, suitable for a large area of permanent bearing foundation reinforcement.

Three-way stretch plastic geogrid is a new type of product developed and improved on the basis of unidirectional and bi-directional stretch plastic geogrid, the main material is polypropylene (pp). Its main feature is close to isotropic, and in the 360 ° direction has a similar tensile modulus, can be completely in contact with the soil, so that the stress distribution is more uniform, increasing the friction of the tendons and soil interface, can be better with the soil embedded lock.

2 Warp-woven polyester geogrid

Warp-knitted polyester geogrid pro polyester fiber filament as raw material, warp and weft direction woven into the grid blank, coated with polyvinyl chloride (PVC) rubber or styrene-butadiene latex processed into the plane mesh structure geogrid, as shown in Figure 1-H. Its high strength and modulus, creep is small, tear resistance is good, but the manufacturing requirements are high.

3 Welded steel-plastic geogrid

Steel-plastic composite geogrid is a high-strength steel wire (or other fibers) as raw materials, after special treatment, and polyethylene (PE) mixed, and add other additives, through extrusion to make it become a composite high-strength tensile strips, and the surface of the rough embossed. The single strips are woven or clamped together in the warp and longitudinal directions at a certain spacing, and are molded by welding their joints using a special bond-strengthening fusion welding technique.

4 Welded polyester geogrid

PET polyester welded geogrid with polyester as the main material, adding anti-aging oxidants and other additives, after a low number of mechanical stretching into a delicate ribbing, according to the plane of the warp and weft into a right angle, by ultrasonic special welding molding of geosynthetics. The tool project needs to briefly use different mesh diameters and rib widths and thicknesses to change the size of the tensile strength of the ribbons.

5 Warp-woven glass fiber geogrid

Warp knitting glass fiber geogrid is made of glass fiber as raw material, using a certain weaving process made of mesh structure materials, fiber filament double-sided coating and become, it makes full use of the fabric in the yarn strength, to improve its mechanical properties so that it has good tensile strength, tear strength and creep resistance. In addition, there are high tensile strength, high melting point, corrosion resistance, as well as good compatibility with asphalt mixtures and other characteristics.