Geosynthetics August/September 2019 - 35
(tufted geosynthetic) and a specified infill
for the tufted geosynthetic. A graphic
representation of the system is shown in
Figure 3.
The TG-FCS is comprised of individual components that perform the following functions:
1. Structured geomembrane: This can
be made from either linear lowdensity polyethylene (LLDPE) or
high-density polyethylene (HDPE),
allowing for local regulatory requirements. It provides an impermeable
layer that prevents water infiltration
into the waste area, thereby offering
environmental containment.
2. Engineered synthetic turf: This is
turf comprised of two layers of high
UV-resistant geotextile, and provides
a substrate into which the polyethylene (PE) turf fibers are tufted. The
turf layer serves multiple functions:
a. Protection layer: This layer shields
the structured geomembrane
from UV radiation exposure.
b. Wind uplift protection: The turf
roughness combined with the
porous woven geotextile backing
prevents wind from lifting either
the turf or the geomembrane.
This has been validated through
independent wind-tunnel testing.
c. Infill containment: The PE turf
fibers help to hold the specified
infill in place, similar to how
beach grass holds sand in place
on sand dunes.
d. Aesthetics: The PE turf fibers,
once infilled, provide a positive
aesthetic benefit. The installed
and infilled turf appears to be
healthy, natural turf.
3. Specified infill: The selection of
infill is determined by the application stresses anticipated for the
designated area of the cover system. Regardless of the specific component type, the infill provides a
cushion layer for the system, protecting the turf backing and geomembrane layer underneath from
impact stresses and UV radiation
exposure. The infill allows the
installed system to be trafficked by
rubber-tired and rubber-tracked
equipment as well as wildlife.
Additionally, it serves as a redundant ballast layer for the system.
The following types of infill are currently available options:
a. ASTM C33 sand: Often referred
to as "concrete sand" or "washed
sand," ASTM C33 sand is typically
used on flat surfaces and slopes
with relatively mild hydraulic
sheet flow. The C33 specification
geogrid
performance monitoring
n
Measure deformation in geogrid layers
n
Detect development of any underlying sink holes
n
Automated, long-term monitoring
www.geokon.biz/geogrids
geokon | Lebanon, NH, USA | +1.603.448.1562
www.GeosyntheticsMagazine.com
35
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Geosynthetics August/September 2019
Table of Contents for the Digital Edition of Geosynthetics August/September 2019
Geosynthetics August/September 2019 - Cover1
Geosynthetics August/September 2019 - Cover2
Geosynthetics August/September 2019 - 1
Geosynthetics August/September 2019 - 2
Geosynthetics August/September 2019 - 3
Geosynthetics August/September 2019 - 4
Geosynthetics August/September 2019 - 5
Geosynthetics August/September 2019 - 6
Geosynthetics August/September 2019 - 7
Geosynthetics August/September 2019 - 8
Geosynthetics August/September 2019 - 9
Geosynthetics August/September 2019 - 10
Geosynthetics August/September 2019 - 11
Geosynthetics August/September 2019 - 12
Geosynthetics August/September 2019 - 13
Geosynthetics August/September 2019 - 14
Geosynthetics August/September 2019 - 15
Geosynthetics August/September 2019 - 16
Geosynthetics August/September 2019 - 17
Geosynthetics August/September 2019 - 18
Geosynthetics August/September 2019 - 19
Geosynthetics August/September 2019 - 20
Geosynthetics August/September 2019 - 21
Geosynthetics August/September 2019 - 22
Geosynthetics August/September 2019 - 23
Geosynthetics August/September 2019 - 24
Geosynthetics August/September 2019 - 25
Geosynthetics August/September 2019 - 26
Geosynthetics August/September 2019 - 27
Geosynthetics August/September 2019 - 28
Geosynthetics August/September 2019 - 29
Geosynthetics August/September 2019 - 30
Geosynthetics August/September 2019 - 31
Geosynthetics August/September 2019 - 32
Geosynthetics August/September 2019 - 33
Geosynthetics August/September 2019 - 34
Geosynthetics August/September 2019 - 35
Geosynthetics August/September 2019 - 36
Geosynthetics August/September 2019 - 37
Geosynthetics August/September 2019 - 38
Geosynthetics August/September 2019 - 39
Geosynthetics August/September 2019 - 40
Geosynthetics August/September 2019 - 41
Geosynthetics August/September 2019 - 42
Geosynthetics August/September 2019 - 43
Geosynthetics August/September 2019 - 44
Geosynthetics August/September 2019 - 45
Geosynthetics August/September 2019 - 46
Geosynthetics August/September 2019 - 47
Geosynthetics August/September 2019 - 48
Geosynthetics August/September 2019 - 49
Geosynthetics August/September 2019 - 50
Geosynthetics August/September 2019 - 51
Geosynthetics August/September 2019 - 52
Geosynthetics August/September 2019 - Cover3
Geosynthetics August/September 2019 - Cover4
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