Biaxial Geogrids

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

Biaxial Geogrid Dimensions

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)

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