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Geogrid for Load Support and Soil Stabilization

Geogrids stabilize extremely poor soils and support heavy loads. These geosynthetics are categorized by their high tensile strength and are often specified to support haul roads, highway overpasses, high traffic roadways and bridges.

Types of Geogrid

Bi-Axial Geogrid

Load support for paved roadways and haul roads
Strength in two directions
Extruded polypropylene with open apertures

Applications

Soft soil stabilization
Base reinforcement
Embankments over soft soils
Haul roads
Work platforms

Products

BX1100
BX1200

Bi-Axial Geogrids are simple-to-install, high strength geotextiles that stabilize subgrade. When installed properly, this grid reduces the thickness of the aggregate base by confining soil and stone particles. 

Confinement prevents lateral shearing which allows the load to spread over a broader plane, ultimately decreasing the pressure applied to the subgrade level.

Bi-axial geogrids have a drawn open aperture that allows the soil or aggregate to fill the space between the ribs to reinforce support for the subgrade. To prevent contamination between aggregate and soil, install bi-axial grids with a nonwoven geotextile fabric.

Technical CharacteristicsBX1100
MD Values1
BX1100
XMD Values1
BX1200
MD Values1
BX1200
XMD Values1
Aperture Dimensions227 mm (1.06 in)37 mm (1.45 in)28 mm (1.10 in)38 mm (1.49 in)
Minimum Rib Thickness20.76 mm (0.03 in)0.76 mm (0.03 in)1.27 mm (0.05 in)1.27 mm (0.05 in)
Tensile Strength at 2% Strain34.1 kN/m (280 lb/ft)6.6 kN/m (450 lb/ft)6.0 kN/m (410 lb/ft)9.0 kN/m (620 lb/ft)
Tensile Strength at 5% Strain38.5 kN/m (580 lb/ft)13.4 kN/m (920 lb/ft)11.8 kN/m (810 lb/ft)19.6 kN/m (1,340 lb/ft)
Ultimate Tensile Strength312.4 kN/m (850 lb/ft)19.0 kN/m (1300 lb/ft)19.2 kN/m (1,310 lb/ft)28.8 kN/m (1,970 lb/ft)

Notes
1. Unless indicated otherwise, the values shown are the minimum average roll value determined in accordance with ASTM D4759-02.
2. Nominal dimensions.
3. Tensile Strength is determined in accordance with ASTM D6637-10 Method A.
Structural IntegrityBX1100BX1200
Junction Efficiency493%93%
Flexural Stiffness5350,000 mg-cm750,000 mg-cm
Aperture Stability60.32 m-N/deg0.65 m-N/deg

Notes
4. Load transfer capability determined in accordance with ASTM D7737-11.
5. Resistance to bending force determined in accordance with ASTM D7748-12, using specimens of width two ribs wide, with transverse ribs cut flush with exterior edges of longitudinal ribs, and of length sufficiebtly long to enble measurement of the overhang dimension.
6. Resistance to in-plane rotational movement measured by applying a 20 kg-cm (2 m-N) moment to the central junction of a 9-IN x 90IN specimen restrained at its perimeter in accordance with US Army Corps of Engineers Methodology for measurement of torsional rigidity.
DurabilityBX1100BX1200
Resistance to Installation Damage795% SC / 93% SW / 90% GP95% SC / 93% SW / 90% GP
Resistance to Long Term Damage8100%100%
Resistance to UV Damage9100%100%
Notes

7. Resistance to loss of load capacity or structural integrity when subjected to mechanical installation stress on clayey sand (SC), well-graded sand (SW), and crushed stone classified as poorly graded gravel (GP). The geogrid shall be sampled in accordance with ASTM D5818-06 and load capacity shall be determined in accordance with ASTM D6637.
8. Resistance to loss of load capacity or structural integrity when subjected to chemically aggressive environments in accordance with EPA 9090 immersion testing.
9. Resistance to loss of load capacity or structural integrity when subjected to ultraviolet light and aggressive weathering in accordance with ASTM D4355-05.
Uni-Axial Geogrid

Uni-Axial Geogrid

Reinforcement for slopes and walls
Strength in one direction
Woven or knitted polyester yarns

Applications

Steep slope reinforcement
MSE wall support

Products

ERS-2
ERS-3
ERS-5
ERS-8

Uni-Axial Geogrid was developed to reinforce steep slopes and support MSE/retaining walls. Uni-Axial Grids are comprised of either polyester or polypropylene yarns woven into an interlocking grid.

These geogrids have unparalleled strength in one direction. This one-directional strength makes it purposeful in tie back applications for MSE walls, berms, and other geosynthetic structures.

3D Triplanar Grid

3D Triplanar Geogrid

Base reinforcement for heavy construction
Extruded polypropylene creates unique high profile rib and junctions
Made in America

Applications

Permanent roads
Unpaved haul roads
Temporary access roads
Work platforms
Levee construction

Products

3D-LT
3D-T
3D-HT
3D-XL

Triplanar Geogrid is manufactured from a unique extrusion process resulting from a perforated polypropylene sheet that is specifically shaped to create a triplanar reinforcing structure. This process produces a large concave shaped rib to better trap aggregate materials by restricting horizontal movement of stone and preventing displacement. Higher profile ribs and junctions improve interlock and stress distribution, thereby reducing rutting and aggregate base thickness.

Physical Properties3D-LT Values13D-T Values13D-HT Values13D-XL Values1
Rib Pitch – MD/XMD233 mm (1.30 in) / 33 mm (1.30 in)32 mm (1.26 in) / 32 mm (1.26 in)32 mm (1.26 in) / 32 mm (1.26 in)60 mm (2.40 in) / 60 mm (2.40 in)
Mid-Rib Depth – MD/XMD23.0 mm (0.12 in) / 1.0 mm (0.04 in)3.3 mm (0.13 in) / 1.2 mm (0.05 in)3.5 mm (0.14 in) / 1.2 mm (0.05 in)3.0 mm (0.12 in) / 1.3 mm (0.5 in)
Mid-Rib Width – MD/XMD23.3 mm (0.13 in) / 2.0 mm (0.08 in)3.5 mm (0.14 in) / 2.0 mm (0.08 in)3.7 mm (0.15 in) / 2.0 mm (0.08 in)3.8 mm (0.15 in) / 4.8 mm (0.19 in)
Rib Shape – MD/XMDInverted T Beam / RectangularInverted T Beam / RectangularInverted T Beam / RectangularRectangular

1. Unless indicated otherwise, values shown are minimum average roll values determined in accordance with ASTM D4759-11.
2. Nominal dimensions.
Structural Integrity3D-LT Values3D-T Values3D-HT Values3D-XL Values
Aperture Stability30.30 N-m/deg1.0 N-m/deg1.2 N-m/deg1.4 N-m/deg
Flexural Stiffness41,200,000 mg-cm2,100,000 mg-cm2,750,000 mg-cm3,000,000 mg-cm
Radial Stiffness at 0.5% Strain – MD/XMD5204 kN/m (14,000 lb/ft)321 kNm (22,000 lb/ft)372 kNm (25,520 lb/ft)437 kNm (30,000 lb/ft)

3. Resistance to in-plane rotational movement measured by applying a 20 kg-cm (2 m-N) moment to the central junction of a 9-IN x 9-IN specimen restrained at its perimeter in accordance with ASTM D7864-15.
4. Resistance to bending force determined in accordance with ASTM D7748-14, using specimens of width two ribs wide, with transverse ribs cut flush with exterior edges of longitudinal ribs, and of length sufficiently long to enable measurement of the overhang dimension.
5. . Radial stiffness is determined from tensile stiffness measured in any in-plane axis from testing in accordance with ASTM D6637-15, tolerance +/-2%.
Durability3D-LT Values3D-T Values3D-HT Values3D-XL Values
Resistance to Installation Damage6100% SC / 100% SW / 100% GP100% SC / 100% SW / 100% GP100% SC / 100% SW / 100% GP100% SC / 100% SW / 100% GP
Resistance to Long Term Damage7100%100%100%100%
Resistance to UV Damage8100%100%100%100%
Resistance to UV Damage9100 years100 years100 years100 years

6. Resistance to loss of load capacity or structural integrity when subjected to mechanical installation stress in clayey sand (SC), well graded sand (SW), and crushed stone classifed as poorly graded gravel (GP). The geogrid shall be sampled in accordance with ASTM D5818-11 and load capacity shall be determined in accordance with ASTM D6637.
7. Resistance to loss of load capacity or structural integrity when subjected to chemically aggressive environments.
8. Resistance to loss of load capacity or structural integrity when subjected to ultraviolet light and aggressive weathering.
9. Test for declared service life up to 100 years of combined aging for Polypropylene Material.

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