2.2.3
Reinforcement Properties
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NOTES: Permittivity - Reinforcement geotextiles
should not puddle or impede infiltration or seepage.
AASHTO M 288 provides some default guidance.
Geosynthetic Selection - The Federal Acquisition
Regulations require full and open competition.
Usually justification is not necessary if 3 products
meet the specifications. In combining various
material requirements, it is easy to specify a
geosynthetic product that does not exist. Design
utilizing geosynthetics should include a listing
with the calculations that verify the specified
products are commercially available. The
Geosynthetics Fabrics Report magazine publishes an
annual specifiers guide that is ideal for this
purpose.
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The reinforcement shown in the approved shop drawing submittal shall meet
the long term design strength requirements used in the design, and shall
meet the properties listed in Table 1. Reinforcement strength requirements
represent minimum average roll values in the machine direction.
The reinforcement shown on the contract drawings shall meet the property
requirements listed in Table 1. Reinforcement strength requirements
represent minimum average roll values in the machine direction.
The reinforcement shown on the contract drawings shall meet the property
requirements listed in Table 1. Additional reinforcement shown in the
approved shop drawing submittal shall meet the long term design strength
requirements used in the design and shall meet other properties listed in
Table 1. Reinforcement strength requirements represent minimum average
roll values in the machine direction.
TABLE 1.
REINFORCEMENT PROPERTIES
PROPERTY
REQUIREMENT
TEST DESIGNATION
Long Term Design
[_____] kN/m lb/inch
NCMA TR127,
Strength
Method A
Permittivity (geotextiles)
[0.5] per second
ASTM D 4491
UV Resistance
70 percent after
ASTM D 4355
500 hours
Coefficient of Interaction
for Pullout
[.85]
GSI GRI GT6
Coefficient for Direct
[_____] degrees
ASTM D 5321
Shear
2.2.3.1
Long Term Design Strength
The long term design strength shall be based on reduction factors for
installation damage and durability that are applicable to the fill that
will be used. Minimum reduction factors for durability include: 1.1 for
SECTION 02832
Page 18
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