TM 5-818-8/AFJMAN 32-1030
Table 2-3. Relationship of Construction Elements to Severity of Loading Imposed on Geotextile in Roadway Construction.
Severity Category
Moderate
Variable
High to Very High
LOW
Heavy weight dozer;
Light weight
Equipment
Medium weight
dozer; light
loaded dump truck
dozer (8 psi)
wheeled equipment
(>40 psi)
(8-40 psi)
Not cleared
Partially cleared
Cleared
Subgrade
Condition
1-2
>3
<0.5
Subgrade
Strength
(CBR)
Coarse angular
Rounded sandy
Cobbles, blasted
Aggregate
gravel
gravel
rock
12
6
18
Lift
Thickness
(in.)
Table 24. Minimum Geotextile Strength Properties for Survivability.
Required
Burst
Trap
Puncture
Degree
Strength3
Tear4
Grab
Strength'
Strength'
of Geotextile
psi
lb
lb
1b
Survivability
Very high
270
110
430
75
High
180
75
290
50
Moderate
130
40
210
40
30
90
145
Low
30
All values represent minimum average roll values (i.e., any roll in a
Note:
lot should meet or exceed the minimum values in this table). These
values are normally 20 percent lower than manufacturers reported
typical values.
'ASTM D 4632.
'ASTM D 4833.
3
ASTM D 3786.
4
ASTM D 4533, either principal direction.
2-5
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