Rigid biaxial geogrids improve the performance of aggregate base course materials supporting, paved and unpaved roadway surfaces and railway ballast and Mechanically Stabilized Earth (MSE) walls and slopes. Their integrally formed structure provides lateral stability of unbounded base courses by the interlocking of granular particles into the geogrid apertures, thus improving their vertical stress distribution characteristics. The reinforcement action of polypropylene geogrids is generated by the vertical stress causing both the aggregate and geogrid to deform. Roads and railways built with PP biaxial geogrids have increased load bearing capacity, a longer service life and reduced section thickness.
Our biaxial geogrids are manufactured by extruding, punching, longitudinal and transverse stretching of polypropylene. This results in a geogrid with high flexural rigidity and high tensile modulus in both the longitudinal (MD) and transverse (TD) directions. Its excellent structural stability and strong mechanical interlock performance are ideal for soil reinforcement.
BX Geogrid Applications
- Base reinforcement – reduced lateral spreading of the base course
- Subgrade reinforcement – increased confinement leading to stiffer base
- Slope reinforcement
- Embankment stabilization
Polypropylene biaxial geogrids are available with the following tensile strengths:
15/15kN/m 20/20kN/m 25/25kN/m 30/30kN/m 40/40kN/m 45/45kN/m 50/50kN/m
Dimensions of Polypropylene biaxial geogrids
Specifications
| Product | AL | AT | WLR | WTR | tLR | tTR | tJ |
|---|---|---|---|---|---|---|---|
| GG1515 | 36 | 36 | 2.6 | 2.6 | 1.0 | 0.8 | 3.1 |
| GG2020 | 35 | 35 | 2.6 | 2.6 | 1.5 | 1.1 | 3.5 |
| GG2525 | 34 | 34 | 2.8 | 2.8 | 1.8 | 1.4 | 4.2 |
| GG3030 | 34 | 34 | 3.0 | 3.0 | 2.5 | 1.5 | 4.9 |
| GG4040 | 33 | 33 | 3.0 | 3.0 | 3.4 | 2.1 | 5.5 |
| GG4545 | 32 | 32 | 3.1 | 3.1 | 4.1 | 2.2 | 5.6 |
| GG5050 | 30 | 30 | 3.1 | 3.1 | 4.3 | 2.5 | 5.8 |
*unit=mm
BXGG20
| Index Properties | Test Method | Units | MD Values | TD Values |
|---|---|---|---|---|
| Polymer | – | – | PP | – |
| Minimum Carbon Black | ASTM D 4218 | % | 2 | – |
| Tensile Strength @ 2% Strain | ASTM D 6637 | kN/m(lb/ft) | 7(480) | 7(480) |
| Tensile Strength @ 5% Strain | ASTM D 6637 | kN/m(lb/ft) | 14(960) | 14(960) |
| Ultimate Tensile Strength | ASTM D 6637 | kN/m(lb/ft) | 20(1,370) | 20(1,370) |
| Strain @ Ultimate Strength | ASTM D 6637 | % | 13 | 13 |
| Structural Integrity | ||||
|---|---|---|---|---|
| Junction Efficiency | GRI GG2 | % | 93 | 93 |
| Flexural Rigidity | ASTM D 7748 | mg-cm | 750,000 | – |
| Aperture Stability | COE Method | m-N/deg | 0.50 | – |
| Dimensions | ||||
|---|---|---|---|---|
| Aperture Dimensions | – | mm(in) | 35(1.4) | 35(1.4) |
| Minimum Rib Thickness | ASTM D 1777 | mm(in) | 1.5(0.06) | 1.1(0.04) |
| Roll Width | – | m(ft) | 3.95(12.9) or 5.95(19.5) | – |
| Roll Length | – | m(ft) | 50(164) | – |