Geosynthetics April/May 2021 - 41

Over the past seven months, the
Geosynthetic Institute (GSI) has been
working with the Florida Department of
Transportation to conduct tests on five different commercially available geotextiles
used in the construction of GGFMs. As of
the beginning of 2021, we have created a
new specification for this application. The
result of our efforts can be found on our
website (https://geosynthetic-institute.org)
under specifications entitled GRI Standard
GT16 " Specification for Test Methods,
Properties and Frequencies of Geotextile
Grout Filled Mattresses (GGFM). " The
specification is a template of required
properties for a manufacturer to meet or
exceed. If a geotextile used for this application does indeed meet the requirements,
it should function well over time as a
GGFM. The properties listed in the specification were obtained by testing multiple
commercially available products according to the latest standard test methods.
The unique aspect of this specification
in comparison to other specifications is
the added emphasis on strip tensile testing rather than wide-width testing and
percent open area (POA) testing in addition to the requirement for long-term
performance testing regarding ultraviolet
ray durability.
We believe that this new specification
is a step forward for this technology. It
provides clear instructions on the intent
and performance of GGFMs. The new
specification can also be used to support the costing of a project, minimize
risk and improve efficiency by allowing
a manufacturer to inventory material.
Perhaps you will consider using it on
your next GGFM project. G

FIGURE 1 GGFM being
filled incrementally.
Courtesy of HUESKER

FIGURE 2 Cross-section
schematic of GGFM.
Courtesy of HUESKER

FIGURE 3 Five geotextiles
with one-ply construction
of GGFM. Note the similar
geometry from five
different manufacturers.

FIGURE 4 GGFM under a pier
after three years of service.
Courtesy of HUESKER

>> For more, search GSI at
www.GeosyntheticsMagazine.com.

www.GeosyntheticsMagazine.com

41


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Geosynthetics April/May 2021

Table of Contents for the Digital Edition of Geosynthetics April/May 2021

Geosynthetics April/May 2021 - Cover1
Geosynthetics April/May 2021 - Cover2
Geosynthetics April/May 2021 - 1
Geosynthetics April/May 2021 - 2
Geosynthetics April/May 2021 - 3
Geosynthetics April/May 2021 - 4
Geosynthetics April/May 2021 - 5
Geosynthetics April/May 2021 - 6
Geosynthetics April/May 2021 - 7
Geosynthetics April/May 2021 - 8
Geosynthetics April/May 2021 - 9
Geosynthetics April/May 2021 - 10
Geosynthetics April/May 2021 - 11
Geosynthetics April/May 2021 - 12
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Geosynthetics April/May 2021 - 14
Geosynthetics April/May 2021 - 15
Geosynthetics April/May 2021 - 16
Geosynthetics April/May 2021 - 17
Geosynthetics April/May 2021 - 18
Geosynthetics April/May 2021 - 19
Geosynthetics April/May 2021 - 20
Geosynthetics April/May 2021 - 21
Geosynthetics April/May 2021 - 22
Geosynthetics April/May 2021 - 23
Geosynthetics April/May 2021 - 24
Geosynthetics April/May 2021 - 25
Geosynthetics April/May 2021 - 26
Geosynthetics April/May 2021 - 27
Geosynthetics April/May 2021 - 28
Geosynthetics April/May 2021 - 29
Geosynthetics April/May 2021 - 30
Geosynthetics April/May 2021 - 31
Geosynthetics April/May 2021 - 32
Geosynthetics April/May 2021 - 33
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Geosynthetics April/May 2021 - 35
Geosynthetics April/May 2021 - 36
Geosynthetics April/May 2021 - 37
Geosynthetics April/May 2021 - 38
Geosynthetics April/May 2021 - 39
Geosynthetics April/May 2021 - 40
Geosynthetics April/May 2021 - 41
Geosynthetics April/May 2021 - 42
Geosynthetics April/May 2021 - 43
Geosynthetics April/May 2021 - 44
Geosynthetics April/May 2021 - Cover3
Geosynthetics April/May 2021 - Cover4
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