Geosynthetics June/July 2021 - 10

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USEFUL SERVICE LIFE OF
NONWOVEN GEOSYNTHETICS
Q: Where can I find literature on the useful
service life of nonwoven geosynthetic fabrics
installed in soils? Thank you.
A: Nice to hear from you and thanks for
your question in regard to the service life of
nonwoven geotextiles.
Below is a reference that I think is very good.
In addition, I have exhumed a TYPAR roadway
separation installation from 1972 every 10
years, and it is still going very strong.
Greenwood, John H. (2015). " Part 2: Durability
of geosynthetics. " Geosynthetics, 33(5): October/
November, www.geosyntheticsmagazine
.com/2015/10/01/part2-durability-of-geosynthetics.
GCLS IN COLD TEMPERATURES
Q: I am working on supporting a guide
(independent) on what to consider when
geosynthetic clay liners (GCLs) are installed in
minus temperature regions (e.g., -4˚F [-20˚C]).
There is not much published on this, especially
independently. This is the only thing I found:
Designation: D6102-20
Standard Guide for Installation of
Geosynthetic Clay Liners
5.3.8 The GCL should not be installed
when it is frozen.
The question is, when does it get critical?
Bentonite does not shrink if the moisture
content is less than 12%-15%. I ran some tests
10
Geosynthetics | June July 2021
with GCLs with a moisture content of 59˚F
(15˚C) and allowed them to be for three days
at -6˚F (-21˚C) and then unroll them-no
problem. However, I never went higher. GRIGCL3
mentions an acceptable value of 95˚F
(35˚C), and I am pretty sure that rolls could not
be handled on-site under these conditions.
A: Nice to hear from you and a great question.
ASTM D6102 Standard Guide for Installation
of Geosynthetic Clay Liners does state
in section 5.3.8, " The GCL should not be
installed when it is frozen. " However, in
reality, we now see many projects that take
exception to this requirement. For example,
the temperature is below freezing for half
the year in places like the Fort McMurray oil
sands project in Alberta, Canada. We know
that CETCO installed its CL GCL product there
year-round from 2005 to 2008. One needs to
use a bit of common sense. Store the GCL in
a heated warehouse and bring it out when
needed on days of opportunity.
A cold-weather GCL installation guide might
contain the following:
* Only allowed above 14˚F (-10°C) under
special provisions and approval of owner
and regulatory agency
* Moisture content of GCL needs to be less
than 15%
* Cannot be placed over frozen puddles
(nature of subgrade will become very
important-i.e., sand is okay, silty-clay is not)
There are many questions; however, we are
pushing the envelope and filling a need for
critical, time-sensitive projects.
http://www.geosyntheticsmagazine https://www.tinyurl.com/GMATechline

Geosynthetics June/July 2021

Table of Contents for the Digital Edition of Geosynthetics June/July 2021

Geosynthetics June/July 2021 - Cover1
Geosynthetics June/July 2021 - Cover2
Geosynthetics June/July 2021 - 1
Geosynthetics June/July 2021 - 2
Geosynthetics June/July 2021 - 3
Geosynthetics June/July 2021 - 4
Geosynthetics June/July 2021 - 5
Geosynthetics June/July 2021 - 6
Geosynthetics June/July 2021 - 7
Geosynthetics June/July 2021 - 8
Geosynthetics June/July 2021 - 9
Geosynthetics June/July 2021 - 10
Geosynthetics June/July 2021 - 11
Geosynthetics June/July 2021 - 12
Geosynthetics June/July 2021 - 13
Geosynthetics June/July 2021 - 14
Geosynthetics June/July 2021 - 15
Geosynthetics June/July 2021 - 16
Geosynthetics June/July 2021 - 17
Geosynthetics June/July 2021 - 18
Geosynthetics June/July 2021 - 19
Geosynthetics June/July 2021 - 20
Geosynthetics June/July 2021 - 21
Geosynthetics June/July 2021 - 22
Geosynthetics June/July 2021 - 23
Geosynthetics June/July 2021 - 24
Geosynthetics June/July 2021 - 25
Geosynthetics June/July 2021 - 26
Geosynthetics June/July 2021 - 27
Geosynthetics June/July 2021 - 28
Geosynthetics June/July 2021 - 29
Geosynthetics June/July 2021 - 30
Geosynthetics June/July 2021 - 31
Geosynthetics June/July 2021 - 32
Geosynthetics June/July 2021 - 33
Geosynthetics June/July 2021 - 34
Geosynthetics June/July 2021 - 35
Geosynthetics June/July 2021 - 36
Geosynthetics June/July 2021 - 37
Geosynthetics June/July 2021 - 38
Geosynthetics June/July 2021 - 39
Geosynthetics June/July 2021 - 40
Geosynthetics June/July 2021 - 41
Geosynthetics June/July 2021 - 42
Geosynthetics June/July 2021 - 43
Geosynthetics June/July 2021 - 44
Geosynthetics June/July 2021 - Cover3
Geosynthetics June/July 2021 - Cover4
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-december-2021-january-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-october-november-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-august-september-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-june-july-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-april-may-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-february-march-2021
https://www.nxtbook.com/ifai/geosynthetics/1220GS
https://www.nxtbook.com/ifai/geosynthetics/1020GS
https://www.nxtbook.com/ifai/geosynthetics/0820GS
https://www.nxtbook.com/ifai/geosynthetics/0620GS
https://www.nxtbook.com/ifai/geosynthetics/0420GS
https://www.nxtbook.com/ifai/geosynthetics/0220GS
https://www.nxtbook.com/ifai/geosynthetics/1219GS
https://www.nxtbook.com/ifai/geosynthetics/1019GS
https://www.nxtbook.com/ifai/geosynthetics/0819GS
https://www.nxtbook.com/ifai/geosynthetics/0619GS
https://www.nxtbook.com/ifai/geosynthetics/0419GS
https://www.nxtbook.com/ifai/geosynthetics/0219GS
https://www.nxtbook.com/ifai/geosynthetics/1218GS
https://www.nxtbook.com/ifai/geosynthetics/1018GS
https://www.nxtbook.com/ifai/geosynthetics/0818GS
https://www.nxtbook.com/ifai/geosynthetics/0618GS
https://www.nxtbook.com/ifai/geosynthetics/0418GS
https://www.nxtbook.com/ifai/geosynthetics/0218GS
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