ETL 1110-1-189
14 Feb 03
Table 2
Minimum Geotextile Specification Requirements1
ASTM Test
Minimum
Requirement2
Geotextile Property
Method
Grab Strength (lb)
D 4632
200
Puncture Strength (lb)
D 4833
80
Burst Strength (psi)
D 3786
250
Trapezoid Tear (lb)
D 4533
80
Apparent Opening Size (mm)
D 4751
< 0.43
Permittivity (sec-1)
D 4491
0.05
Ultraviolet Degradation (% Retained Strength @ 500 hr)
D 4355
50
Polymer Type
-------
Polyester (PET)
or Polypropylene
(PP)
1
This specification is for nonwoven geotextiles, which are recommended for typical separation
applications.
2
Minimum requirements include both machine and cross-machine directions.
Table 3
Minimum Biaxial Geogrid Specification Requirements
ASTM Test
Minimum
Geogrid Property
Requirement1
Method
Mass per Unit Area (oz/yd2)
D 5261
9.0
Aperture Size Machine Direction (in.)
Direct Measure
1.0
Aperture Size Cross-Machine Direction (in.)
Direct Measure
1.3
Wide Width Strip Tensile Strength (lb/ft)/% :
700
Strength at 5% Strain - Machine Direction
1,200
D 6637
Strength at 5% Strain - Cross-Machine Direction
1,200
Ultimate Strength Machine Direction
2,096
Ultimate Strength Cross-Machine Direction
Manufacturing Process
-------
Punched & Drawn
1
Minimum requirements include both machine and cross-machine directions based upon
Webster (1993).
in aggregate-surfaced roads is based upon the subgrade soil conditions. Geosynthetics used to
the subgrade. As the design subgrade strength increases, the primary application of the
geosynthetic transitions from mechanical subgrade stabilization to base reinforcement.
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