Biaxial PP Plastic Geogrid
Biaxial PP Plastic Geogrid is used for Improving bearing capacity of foundation, Preventing cracking and subsiding. It is convenient construction material and economical in cost.
The mechanical performance properties of PP geogrids are usually tested by tensile strength, nominal elongation and performance utilization factor. According to the Chinese national standard GB/T17689-2008 [9], the testing method is divided into single-rib method and multi-rib method.
Product Description
Biaxial PP Plastic Geogrid is made of high molecular polymer through extrusion, forming and punching before longitudinal Biaxial PP Plastic Geogrid and transverse stretching. It has considerable tensile strength in both longitudinal and lateral direction and can effectively bear and diffuse forces on soil. It is suitable for large area permanent load bearing foundation as a reinforcement material to enhance soil stability and extend service life.
In the process of manufacturing geogrid, the size of the holes and the technical parameters of the punching die have a great influence on its mechanical properties. For example, the diameter-to-distance ratio of the punched hole has a direct impact on the performance utilization factor of the ribs. It is found that the larger the diameter-to-distance ratio, the less the ribs participate in the deformation and the higher the performance utilization factor.
PP Biaxial Plastic Geogrid is commonly used in construction projects for soil reinforcement and stabilization. Its high strength, durability, chemical resistance and interlocking characteristics make it an ideal choice for many applications. The PP geogrid is ideal for improving the performance of weak subgrades by distributing dynamic loads and minimizing shear failures. It is also widely used in road construction to enhance the load bearing capacity of roads and reduce maintenance costs.
Moreover, the PP geogrid is often employed in retaining wall and embankment construction to stabilize slopes and increase their stability. It is also used in the construction of landfills and dams to prevent water loss and soil erosion.
Application
Biaxial PP Plastic Geogrid can be used in soil reinforcement projects such as embankments and slopes. It helps stabilize the structure, preventing erosion and increasing load-bearing capacity. It can also be used in pavement construction to reduce settlement and rutting. Moreover, it is effective in enhancing the strength of steep slopes in highway construction and is an excellent choice for the reinforcement of retaining walls.
The mechanical properties of a biaxial plastic geogrid mainly depend on the diameter-to-distance ratio and percentage difference of longitudinal and transverse spacing. The stress-strain law of ribs and the influence of the process parameters (heating temperature, tensile speed, insulation time and tensile ratio) on the shape and mechanical properties of the grid can be determined by numerical simulation.
The test methods of a biaxial PP plastic geogrid are divided into single-rib and multi-rib method. According to GB/T17689-2008 [9], the single-rib method requires that two ribs in the longitudinal direction should be retained and the clamping method should be as shown in Fig. 1(a).
Technical Specifications
PP Biaxial Plastic Geogrid is made of Polypropylene. It is produced through several processes, including extruding the grid sheet, punching designed holes, heating while longitudinal and transverse stretching. It has high tensile strength and can be used in soil stabilization and reinforcement applications. It has good acid and alkali resistance, corrosion resistance, ageing resistant and durability.
The test mainly studied the influence of diameter-to-distance ratio and percentage difference between longitudinal and transverse spacing on the mechanical properties of the biaxial geogrid sheets. The results showed that the tensile strength, nominal elongation and performance utilization factor of the biaxial geogrid increased with the increase of the longitudinal spacing and decreased with the increase of the transverse spacing.
The morphological characteristics, stress and strain law of the geogrid were analyzed using Abaqus hyperelastic constitutive model. The analysis indicated that the longitudinal ribs of the biaxial geogrid were thicker than the transverse ribs. The longitudinal ribs of the biaxial geogrid also showed higher tensile strength and stiffness than the transverse ribs. The tensile strength and stiffness of the longitudinal ribs of the biaxial grid improved with the increase of the transverse spacing, while the tensile strength and stiffness of transverse ribs reduced with the increase of the longitudinal spacing. The tensile strength and stiffness were also significantly higher with the larger diameter-to-distance ratio.
Pricing
Biaxial PP Plastic Geogrid are made through High Strength Plastic Geocell the process of extruding the sheet, punching the designed holes, heating and longitudinal and transverse stretching. They can be used to strengthen granular base materials for paved and unpaved roads, prevent cracking and subsidence of road surface and foundation and extend the service life of the roadway base.
Compared to a uniaxial geogrid, which provides stabilization in one direction, the biaxial structure allows the grid to distribute forces over a wider area and thus enhances the bearing capacity of the soil. It also increases the shearing resistance of the soil by interlocking with the ribs. The load dispersal effect can reduce the sub-base thickness and construction cost while improving the engineering performance of the soil.
PP Geogrids are widely used in Mechanically Stabilized Earth (MSE) walls and slopes to confine the soil and increase its shearing resistance, which can reduce the construction time and save cost. They can also help reduce the amount of aggregate needed for a particular application and improve the soil’s strength and stiffness.
In order to realize the full use of the material, it is important to know how the basic mechanical properties of the longitudinal and transverse ribs can be regulated after the longitudinal and transverse stretching. This paper studied the influence of the longitudinal spacing LV and the percentage difference between longitudinal and transverse spacing on the basic mechanical properties of the longitudinal ribs, and proposed a method to control their characteristics.