Classification and characteristics of geogrids
Characteristics of glass fiber geogrid:1, high tensile strength, low elongation - fiberglass geogrid with glass fiber as raw material, has a high resistance to deformation, fracture elongation rate of less than 3%.2, no long-term creep as reinforcing material, have in long-term load under the condition of deformation resistance that the creep resistance is extremely important, glass fiber does not creep, which ensure product can maintain long-term performance.3, thermal stability - the melting temperature of glass fiber above 1000 degrees Celsius, which ensures that the fiberglass geogrid in paving operations to withstand the heat stability.4, mixed with asphalt compatible materials - glass fiber geogrid treatment process after coating is designed for asphalt mixture, every fiber is fully coated with high compatibility with asphalt, so as to ensure that the glass fiber geogrid in the asphalt layer and not in isolation of asphalt mixture but, firmly together.5, physical and chemical stability, through special postprocessing agent coating, glass fiber geogrid can resist all kinds of physical and chemical erosion wear, can resist biological erosion and climate change, ensure that its performance is not affected.6, lock and limit the aggregate because of glass fiber geogrid is mesh structure, aggregate in asphalt concrete can be run through them, thus forming a mechanical interlock. This restriction hinders the movement of aggregates, so that the asphalt mixture in the case of load can achieve better compaction state, higher load capacity, better load transfer performance and smaller deformation.
Three, polyester geogrid features:1, the use of warp knitting structure, the warp and weft yarns in the fabric without bending between each other, the intersection of high-strength fiber filament bundle together to form a solid point of integration, give full play to its mechanical properties.2, high strength polyester fiber warp knitted geogrid has high tensile strength, low elongation, tear strength, vertical and horizontal strength difference is small.3, the UV aging resistance, abrasion resistance, corrosion resistance, light weight, and soil or gravel interlocking force, to enhance soil shearing strength and improve the integrity and bearing capacity of the soil has a significant effect. High tensile strength, high tear strength, strong adhesion to the soil.Four, the characteristics of plastic geogrid:1, the polymer into a linear state and the formation of a uniform distribution, high strength of the node of the long elliptical mesh integral structure. This kind of structure has high tensile strength and rigidity, and it provides the ideal chain system of bearing and diffusion of soil.2, to highlight the advantages of geogrid is deformation under sustained loading (creep) tendency is very small, creep strength is much better than other materials geogrid, plays an important role in improving the service life of the project.3, the mesh grille and soil interlock and interlock function, constitute an efficient stress transfer mechanism, so that local load can be quickly and effectively spread to a large area of soil, to reduce the local failure stress, improve the service life of engineering.
Two, steel plastic composite geogrid:1 high strength steel wire, steel plastic composite geogrid tension by warp knitting bear, resulting in high tensile modulus at low strain capacity, vertical and horizontal rib synergistic effect, give full play to the role of Geogrid on soil type.2, steel plastic composite geogrid vertical steel rib weft woven into nets, an outer coating layer forming a steel wire and the outer coating layer can destroy the function of coordination, elongation is very low (less than 3%). The main force unit of steel plastic composite geogrid is steel wire, and the creep is very low.3, through the production process of plastic surface treatment, suppress the rough pattern, in order to enhance the surface roughness of the grid, improve the steel plastic composite geogrid and soil friction coefficient.4, steel plastic composite geogrid width of up to 6m, to achieve high efficiency, economic effect of reinforcement.5, steel plastic composite geogrid used high-density polyethylene can ensure that: at room temperature will not be affected by acid and alkali and salt solution, or oil erosion; will not be dissolved by water or microbial damage. At the same time, the high molecular weight of polyethylene is also sufficient to resist ultraviolet radiation caused by aging. The grille stress aspect rib synergistic effect, can not generate node crack or damage. But in the actual project, after the packing compaction, therefore has not been affected by ultraviolet light and oxygen.
The geogrid is divided into four categories: fiberglass geogrid, steel plastic geogrid, polyester geogrid and plastic geogrid
