Geosynthetics June/July 2019 - 28
Using geosynthetics in flexible airport pavements
a
b
c
d
multiple, equilateral directions to form
triangular apertures; GP 2, a punched
polypropylene sheet oriented in longitudinal and transverse direction to form
biaxial rectangular apertures; GP 3 and
GP 4, both made up of polypropylene
yarns manufactured in an interlocking
longitudinal and transverse direction
to form biaxial rectangular apertures;
and GP 5, a geosynthetic comprised of
polypropylene filaments formed into an
innovative weave. Specific mechanical
properties published by the manufacturer of each geosynthetic product are
shown in Table 5.
FIGURES 3a-3e Physical appearance of
geosynthetic products: a) Geosynthetic
product 1, b) Geosynthetic product 2, c)
Geosynthetic product 3, d) Geosynthetic
product 4, e) Geosynthetic product 5
e
Instrumentation layout
Pressure cells, linear variable displacement transducers (LVDTs) and pore
pressure transducers were installed
throughout the pavement structure to
monitor surface deformation and quantify the response of each pavement structure during cyclic loading. A series of six
LVDTs were placed transversely along
Geosynthetic Product (GP)
Mechanical Property
Method
Units
GP 1
GP 2
GP 3
GP 4
Triaxial Geogrid Biaxial Geogrid Biaxial Geogrid Biaxial Geogrid
Woven
Geotextile
Aperture Dimension (MD)
Measured
inches
Triangular
1×1
0.60 × 0.60
1.35 × 1.35
N/A
Minimum Rib Thickness (MD)
Measured
inches
-
0.05
-
-
N/A
Tensile Strength @ 2% Strain (MD)
ASTM D6637
lb./ft.
-
410
548
1,030
540
Tensile Strength @ 2% Strain (CMD)
ASTM D6637
lb./ft.
-
620
890
1,030
2,160
Tensile Strength @ 5% Strain (MD)
ASTM D6637
lb./ft.
-
810
1,370
2,190
1,560
Tensile Strength @ 5% Strain (CMD)
ASTM D6637
lb./ft.
-
1,340
1,850
2,190
4,920
Ultimate Tensile Strength (MD)
ASTM D6637
lb./ft.
-
1,310
1,850
2,740
-
Ultimate Tensile Strength (CMD)
ASTM D6637
lb./ft.
-
1,970
2,398
2,740
-
Resistance to UV Degradation
ASTM D4355
%
100
100
-
-
90
Mass/Unit Area
ASTM D5261
oz./SY
-
-
6.5
11
-
Longitudinal Rib Pitch
Measured
inches
1.6
-
-
-
-
Diagonal Rib Pitch
Measured
inches
1.6
-
-
-
-
Radial Stiffness @ 0.5% Strain
ASTM D6637
lb./ft.
15,430
-
-
-
-
TABLE 5 Geosynthetic product specifications per the manufacturer data sheets
28
GP 5
Geosynthetics | June July 2019
Geosynthetics June/July 2019
Table of Contents for the Digital Edition of Geosynthetics June/July 2019
Geosynthetics June/July 2019 - Cover1
Geosynthetics June/July 2019 - Cover2
Geosynthetics June/July 2019 - 1
Geosynthetics June/July 2019 - 2
Geosynthetics June/July 2019 - 3
Geosynthetics June/July 2019 - 4
Geosynthetics June/July 2019 - 5
Geosynthetics June/July 2019 - 6
Geosynthetics June/July 2019 - 7
Geosynthetics June/July 2019 - 8
Geosynthetics June/July 2019 - 9
Geosynthetics June/July 2019 - 10
Geosynthetics June/July 2019 - 11
Geosynthetics June/July 2019 - 12
Geosynthetics June/July 2019 - 13
Geosynthetics June/July 2019 - 14
Geosynthetics June/July 2019 - 15
Geosynthetics June/July 2019 - 16
Geosynthetics June/July 2019 - 17
Geosynthetics June/July 2019 - 18
Geosynthetics June/July 2019 - 19
Geosynthetics June/July 2019 - 20
Geosynthetics June/July 2019 - 21
Geosynthetics June/July 2019 - 22
Geosynthetics June/July 2019 - 23
Geosynthetics June/July 2019 - 24
Geosynthetics June/July 2019 - 25
Geosynthetics June/July 2019 - 26
Geosynthetics June/July 2019 - 27
Geosynthetics June/July 2019 - 28
Geosynthetics June/July 2019 - 29
Geosynthetics June/July 2019 - 30
Geosynthetics June/July 2019 - 31
Geosynthetics June/July 2019 - 32
Geosynthetics June/July 2019 - 33
Geosynthetics June/July 2019 - 34
Geosynthetics June/July 2019 - 35
Geosynthetics June/July 2019 - 36
Geosynthetics June/July 2019 - 37
Geosynthetics June/July 2019 - 38
Geosynthetics June/July 2019 - 39
Geosynthetics June/July 2019 - 40
Geosynthetics June/July 2019 - 41
Geosynthetics June/July 2019 - 42
Geosynthetics June/July 2019 - 43
Geosynthetics June/July 2019 - 44
Geosynthetics June/July 2019 - 45
Geosynthetics June/July 2019 - 46
Geosynthetics June/July 2019 - 47
Geosynthetics June/July 2019 - 48
Geosynthetics June/July 2019 - 49
Geosynthetics June/July 2019 - 50
Geosynthetics June/July 2019 - 51
Geosynthetics June/July 2019 - 52
Geosynthetics June/July 2019 - 53
Geosynthetics June/July 2019 - 54
Geosynthetics June/July 2019 - 55
Geosynthetics June/July 2019 - 56
Geosynthetics June/July 2019 - Cover3
Geosynthetics June/July 2019 - Cover4
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