BASE COURSE REINFORCEMENT

SUBGRADE IMPROVEMENT BIAXIAL GEOGRID

SF12 is composed of high molecular weight, high tenacity multifilament polyester yarns that are woven into a stable network placed under tension. The high strength polyester yarns are coated with a polymer coating. SF Geogrids are inert to biological degradation and are resistant to naturally encountered chemicals, alkalis and acids.

SF12 INCREASES THE SERVICE LIFE OF PAVEMENT STRUCTURES BY IMPROVING:

CONFINEMENT OF BASE COURSE

  1. Prevents lateral spreading of the base or sub-base aggregate
  2. Allows for shear interaction to develop between the aggregate and the geogrid

INCREASED TENSILE STRENGTH OF AGGREGATE

  1. SF12 geogrid will reduce applied vertical pressure of heavy loads at depth of aggregate by spreading loads over a wider area.

REINFORCEMENT PROPERTIES

TEST METHOD

MARV VALUES

Lbs/ftkN/m

Ultimate Strength

MD

XMD

ASTM 6637

2,388

5,268

34.9

76.8

Initial Modulus

MD

XMD

ASTM 6637

178,000

235,000

2,598

3,432

Load at 2% Strain

MD

XMD

ASTM 6637

526

797

7.7

11.6

2% Secant Moduli

MD

XMD

ASTM 6637

26,300

39,850

383.6

581.2

Load at 5% Strain

MD

XMD

ASTM 6637

1,042

1,367

15.2

19.9

5% Secant Moduli

MD

XMD

ASTM 6637

20,840

27,340

304

398.8

True in place strength after site damage testing based on TRI method of “installation” damage testing with poorly graded gravel (GP) and well groomed gravel (SW).

Load at 2% Strain

MD (GP)

MD (SW)

ASTM 6637 & ASTM 5818

438

496

6.3

7.2

Load at 2% Strain

XMD (GP)

XMD (SW)

ASTM 6637 & ASTM 5818

664

752

9.7

11.0

Load at 5% Strain

MD (GP)

MD (SW)

ASTM 6637 & ASTM 5818

868

983

12.6

14.3

Load at 5 % Strain

XMD (GP)

XMD (SW)

ASTM 6637 & ASTM 5818

940

1,065

13.7

15.5

Coefficient of Pullout Interaction

ASTM 6706

Sandy Gravel

Sand

Ci = 1.0

Ci = 1.0

Aperture Size *

Measured

MD1.0 in.

XMD1.0 in.

Rib Thickness

Measured

MD.04 in.

XMD.06 in.

* Synteen has the capacity to produce apertures to specific sizes.

GP = Poorly Graded Gravel

SW = Well Groomed Gravel

Standard Roll Size: 12’ x 150’. STF can produce master roll lengths as well.