PP Plastic Two-Way Geogrid

PP plastic two-way geogrid has been widely used in many construction projects. It is an important engineering material that helps to strengthen and stabilize soil. Its mechanical properties greatly affect its practical application. The structure of pre-punched holes and technical conditions during the stretching process have a great influence on its mechanical properties.

Strength

PP plastic two-way geogrids offer strength to buildings and roads by compacting soil or gravel. They are often used for road and railway projects that require strong reinforcement. They are also suitable for underground projects because they can resist corrosive chemicals and have high tensile strength. Moreover, they are resistant to moisture and can be installed quickly.

The production of biaxial geogrids requires a series of steps, including extrusion, plate punching, preheating, longitudinal stretching, secondary heat preservation, transverse stretching, cooling and shaping, cutting and winding. The research on the mechanical properties of extruded polypropylene geogrids is focused mainly on the conditions in the stretching process, but the effect of pre-punched holes on these parameters is not yet fully understood.

This study was conducted to investigate the effects of pre-punched hole sizes and lengths on the mechanical properties of a biaxial plastic geogrid. The geometry of the grid was simulated using Abaqus software. The results of the study showed that the mechanical properties of the geogrid depend on the diameter-to-distance ratio and the percentage difference between longitudinal and transverse spacings.

In addition to the ribs, the junctions of a geogrid are important for its overall durability and serviceability. Several factors affect the junctions’ durability, such as oxidation and temperature. Oxidation is a major cause of long-term degradation of PP and HDPE. Nevertheless, advances in additives and polymer chemistry have reduced oxidation degradation.

Durability

A primary concern for some geogrid users is durability. This may be because geogrids are susceptible to degradation in harsh climates, including high heat and humidity, freezing and thawing cycles, or dry and arid environments. However, these concerns can be reduced by using a geogrid that is suitable for the site conditions and soil type. The Erosion geomat geogrid should also be properly installed and sealed to prevent water, air, and debris from entering the structure.

To improve the durability of PP plastic two-way geogrid, researchers have studied the impact of process parameters on mechanical properties. This includes the influence of the diameter-to-distance ratio and the percentage difference in longitudinal and transverse spacing on the tensile properties of biaxial geogrid sheets. Additionally, they have investigated the effects of varying the number and size of holes in a grid plate on the mechanical properties.

Results from these experiments show that the tensile strength of a geogrid increases with increasing the diameter-to-distance ratio. In addition, the diameter-to-distance Erosion geomat ratio affects the performance utilization factors of the ribs and junctions in a geogrid. This can be explained by the fact that the ribs and junctions of the geogrid deform to different extents during the stretching process.

Flexibility

The PP plastic two-way geogrid is often used in wall retaining and slope stabilization projects. It is characterized by its high load-bearing capacity, strength and flexibility. This type of geogrid can be placed in a variety of soil types, including clay and sand. It is also easy to handle and install. It is ideal for sites with poor compaction. In addition, this product is resistant to corrosion and offers excellent stability.

The biaxial geogrid is produced from high molecular polymer through extrusion, formed and punched before being longitudinally and transversely stretched. It is then cooled and subjected to secondary heat preservation, which reduces the internal damage caused by stretching and improves the mechanical properties of the longitudinal ribs. The biaxial geometry also allows it to provide a more effective chain system for force bearing and spreading in the soil.

A key challenge is the junction point of the biaxial geogrid. This is a region with a higher stress concentration than the ribs and is where failures can initiate. To avoid this problem, a design is needed that can order the polymer chains at the junction points. This can be achieved by increasing the tensile strength and reducing the junction stress. In addition, the oxidation degradation of high-density polyethylene (HDPE) and PP can be reduced by the use of additives.

Cost

Plastic geogrids are a cost-effective way to improve the strength and stability of soils. They are also resistant to biological degradation, moisture, and UV rays. They are often used to stabilize slopes, walls, and road bases. In addition, they can improve the engineering properties of soil by promoting lateral confinement and soil consolidation. However, some manufacturing defects can significantly affect the performance of geogrids. These defects include variations in aperture size and shape, and bent ribs. Manufacturers must conduct thorough inspections and quality control to ensure that these defects are not present in the final product.

Biaxial geogrids are made of high molecular polymer that is extruded into sheet and punched into a regular mesh net before being stretched longitudinally and laterally. This structure provides an effective force bearing and spreading system for the soil and can reduce construction time and labor costs. This product is mainly used in highway, railway and slope protecting projects to strengthen the ground loading capacity and extend service life.

The cost of PP plastic two-way geogrid depends on the number of ribs and the diameter of each node. The smaller the diameter-to-distance ratio is, the better the performance utilization factor will be. This is because the nodes deform to varying degrees during the stretching process, which increases the tensile strength contribution of each node.