Geogrid is a major geosynthetic material. Compared with other geosynthetics, it has unique performance and efficacy. It is often used as the reinforcement of reinforced soil structure or the reinforcement of composite materials.
Geogrid is divided into four categories: plastic geogrid, steel plastic geogrid, glass fiber geogrid and warp-knitted polyester geogrid. Geofantex mainly produces three products: plastic geogrid, fiberglass grid and polyester warp-knitted polyester grid. The grid is a two-dimensional grid or a three-dimensional grid screen with a certain height, which is made of polypropylene, polyvinyl chloride and other high molecular polymers through thermoplastic or molding. When used in civil engineering, it is called geogrid.Plastic Geogrid
Plastic geogrid is a square or rectangular polymer mesh formed by stretching. According to the different stretching directions during manufacture, it can be unidirectional stretching and bidirectional stretching. It punches holes on polymer sheets (mostly polypropylene or high-density polyethylene) produced by extrusion and then performs directional stretching under heating conditions. The unidirectional stretch grid is only stretched along the length of the sheet, while the bidirectional stretch grid is made by continuing to stretch the unidirectional stretched grid in the direction perpendicular to its length.
Basic characteristics of plastic geogrid
- Mechanical properties: Due to the directional stretching during the manufacturing process, the polymer molecules are aligned along the stretching direction, which strengthens the connection force between molecular chains and greatly improves its tensile strength, even stronger than mild steel. It is still large, but the elongation is small. The interlocking force of soil and rock materials in the grid is increased, and the friction coefficient between them is also significantly increased.
- Temperature resistance performance: Due to the stretching effect, its high-temperature resistance performance is also improved.
- Durability: Due to the addition of aging materials such as carbon black in the geogrid, it has good durability such as acid resistance, alkali resistance, corrosion resistance, and aging resistance.
- Construction performance: The geogrid is light in weight, and has a strong bite force with soil or gravel; it is resistant to acid and alkali, corrosion, and aging; it is flexible and easy to construct. The plastic geogrid is a flat plastic mesh material with a certain degree of flexibility, which is easy to cut and connect on site (it can be connected by polyethylene rope or connecting rod), and can also be overlapped, which is convenient for on-site assembly into the required shape and folded during the construction process. The impact of the curve is small, the construction is simple, and no special construction machinery and professional technicians are required.
The Uniaxial and Biaxial applications of plastic geogrid are as follows:
- Uniaxial geogrid is suitable for highway and railway subgrade, embankment, side slope reinforcement, various retaining wall reinforcement, river and sea dam reinforcement, yard reinforcement, bridge abutment reinforcement, and shallower foundation reinforcement. It is widely used in various reinforced retaining walls.
- Biaxial grid is suitable for road and railway subgrade, embankment reinforcement, shallow foundation reinforcement, large squares, car yards, wharf yards, storage yards, and other permanent bearing foundation reinforcements, river roadbed reinforcements, prevention of reflective cracks on asphalt concrete pavements, etc. . It is widely used in the subgrade, embankment reinforcement, and shallow foundation reinforcement.