Steel-plastic geogrids play a crucial role in subgrade materials.

Glass Fiber Reinforced: The glass fiber geogrid is a geosynthetic material primarily made from glass fiber. Glass fiber boasts a high tensile strength, typically ranging from 60 to 120 kN/m, which makes the glass fiber geogrid excel in resisting the generation and expansion of pavement cracks. Moreover, glass fiber has stable chemical properties, resistant to corrosion from acids, alkalis, and other chemicals, maintaining excellent performance in various soil and pavement environments.

The grid structure features a regular grid shape. On one hand, this grid structure provides a larger surface area, enhancing friction and adhesion with pavement materials. On the other hand, it effectively distributes stress. When the pavement is subjected to external forces such as vehicle loads, stress can propagate through the grid, preventing localized damage due to stress concentration.

Principle of Crack Resistance

Stress Absorption and Dispersion: In pavement structures, the loads generated by vehicle traffic create tensile and shear stresses. Geotextile格栅 can absorb and disperse these stresses. When pavement cracks begin to expand, the high-strength mesh of the geotextile can disperse the stresses over a larger area, effectively distributing a concentrated force in multiple directions, thereby slowing the further expansion of cracks. For instance, in asphalt pavements, frequent vehicle traffic can lead to fatigue cracks in the asphalt layer, but geotextile格栅 can effectively prevent the spread of these cracks.

Enhancing Road Integrity: The glass fiber geogrid is tightly integrated with road materials, effectively enhancing the overall integrity of the road surface. It connects various structural layers of the road, such as binding the asphalt surface with the subgrade, allowing the layers to work together under external forces. This is akin to dressing the loose road structure in a "tight-fitting garment," boosting its resistance to deformation and cracking.

Construction Key Points

Road Preparation: Prior to laying the glass fiber geogrid, the road must be cleaned and leveled. Remove debris, dust, and loose materials from the road surface to ensure it is dry and flat. If there are noticeable potholes or bumps, repairs must be made to ensure the geogrid fits the road surface tightly.

Grating Installation: Installation should be carried out according to design specifications. Glass fiber geogrids are typically supplied in rolls and attention must be given to the unwinding direction during installation to ensure the longitudinal orientation of the grid aligns with the traffic flow of the road, maximizing its crack resistance. There should be a certain overlap width between grids, usually not less than 10-15 centimeters, and effective fastening measures should be employed, such as using steel nails or specialized fastening clamps to secure the grid to the road surface, preventing any movement during construction.

Upon combining with road materials: After the geogrid is laid, it is essential to promptly proceed with the road material installation. During the process, ensure that the road materials are in full contact with the geogrid. Appropriate compaction measures can be employed to embed the road materials into the geogrid's mesh, enhancing the friction and interlocking force between them. For instance, when laying asphalt road surfaces, control the temperature and paving speed during the asphalt mixture spreading to ensure the asphalt thoroughly fills the geogrid's mesh.

Application Scenarios and Advantages

New Road Construction: Installing glass fiber geogrids in newly paved asphalt or concrete surfaces effectively prevents the occurrence of cracks. Particularly in high-load traffic roads, mountainous roads, and other areas prone to cracking, they significantly enhance the road's crack resistance, extending its lifespan. For instance, on heavy-duty cargo roads in some large ports, the lifespan of the road surface increased by 30% to 50% after the application of glass fiber geogrids.

Old Road Reconstruction: For roads that have developed cracks, laying glass fiber geogrid during the repair process is an effective renovation measure. It prevents the further expansion of existing cracks and serves as a good transition between the newly laid road materials and the old road surface, enhancing the bonding between the old and new road materials, thus improving the overall quality of the road.