Geogrid role

Geogrid (geogrid) is a major geosynthetics, compared with other geosynthetics, it has unique performance and efficacy. Commonly used as reinforced soil structure of the rib material or composite materials, such as the rib material. Geogrid is divided into plastic geogrid, steel geogrid, glass fiber geogrid and polyester warp knitting polyester geogrid four categories. Grid is made of polypropylene, polyvinyl chloride and other polymers by thermoplastic or molded two-dimensional grid or a certain height of three-dimensional grid screen, when used as civil engineering, known as geogrid.

Low Temperature Resistance

One-way geogrid's special use: low temperature resistance. United company's low temperature geogrid, in -45 ℃ ~ 50 ℃ repeatedly after 200 times of hot and cold cycles, the performance indicators are to meet the requirements, and has been tested by the Qinghai-Tibet Railway, applicable to the north of the less frozen soil, ice-rich frozen soil, high ice-containing permafrost adverse geology. Two-way geogrid products are mainly used in railroads, subways, highways, electric power, water conservancy, soil and water conservation, two-way stretching plastic geogrid is made of polymer through extrusion, plate, punching process and then longitudinally and horizontally stretched. The material in the longitudinal and transverse direction have great tensile strength, this structure in the soil can also provide a more effective force bearing and diffusion of the ideal interlocking system, adapted to a large area of permanent bearing foundation reinforcement. Use: Bi-directional tensile plastic geogrid is suitable for all kinds of embankment and roadbed reinforcement, slope protection.

Anti-fatigue cracking

Asphalt overlay on old cement concrete pavements has the main function of improving the functionality of the pavement and contributes little to the load-bearing function, with the rigid concrete pavement under the overlay still playing a key load-bearing role. Asphalt overlay on old asphalt concrete pavement is different, the asphalt paving layer will be load-bearing together with the old asphalt concrete pavement. Therefore, asphalt overlay on asphalt concrete pavement will not only cause reflection cracks, but also fatigue cracking due to long-term loads. We analyze the loading situation of the asphalt paving layer on the old asphalt concrete pavement: since the asphalt overlay layer is a flexible surface layer of the same nature as the asphalt overlay layer, when subjected to loads, the road surface will be curved and sunk. The asphalt cover layer in direct contact with the wheels is subjected to pressure, and in the area beyond the edge of the wheel load, the surface layer is subjected to tensile force. Due to the fact that the two areas of force are different in nature and are in close proximity to each other, damage is likely to occur at the junction of the two areas of force, i.e., at the point of sudden change in force. Fatigue cracking occurs under long-term loading. Fiberglass geogrid in asphalt cover layer, can be the above compressive stress and tensile stress dispersion, in the two pieces of force area between the formation of a buffer zone, where the stress gradually change rather than sudden change, reduce the stress sudden change on the asphalt cover layer of damage. At the same time, the low elongation of the glass fiber geogrid reduces the bending of the pavement, ensuring that the pavement will not occur transitional deformation.