Geosynthetics June/July 2019 - 11

* Reduced cost by enabling higher
filler levels while meeting required
impact properties.
* High-impact strength that meets or
exceeds industry standards.

Weaknesses
The cost of a PVC geomembrane formulated with KEE is higher than similar
geomembranes formulated with a liquid plasticizer even if the liquid plasticized material meets the Fabricated
Geomembrane Institute specification FGI
1117 requirement of a minimum average
molecular weight of 400 grams/mole.
This is due to both a significantly higher
cost (dollars/pound) of KEE as compared
to standard liquid-based plasticizers and
a greater percentage of KEE being needed
to obtain a similar flexibility for the PVC
and KEE blend. The real benefit of using
KEE is that the resulting geomembrane
will be flexible for a much longer time
and exhibit a greatly extended service life
even in exposed and/or harsh chemical
environments. Therefore, if long service life is desired, a PVC resin and KEE
blend should be considered even though
it may have a higher initial cost. The FGI
is exploring the possibility of creating
a material specification for KEE-based
PVC geomembranes to facilitate their
specification and usage.

KEE applications
Today, a wide variety of both supported
and unsupported geomembrane products containing KEE are available in the
geomembrane and other industries in
applications such as primary and secondary containment in harsh chemical
environments, as well as exposed potable
and nonpotable water containment.
When selecting a product with Elvaloy,
it is critical that the product chosen for
the application contains the correct level

of Elvaloy combined with the appropriate component polymer to ensure the
performance meets the project longevity
requirements. It is not uncommon for
these materials to have a full replacement,
i.e., not prorated, warranty of 15 years
because of the successful uses of these
materials to date.

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

References
Fabricated Geomembrane Institute (FGI) (2017). "FGI
1117 Specification: Effective Jan. 1, 2017." https://
global-uploads.webflow.com/5977726c80d12837b9
592f29/5b208b56f4d69dd83949fe3f_FGI-1117-PVCFinal-4-1-18.
Stark, T. D., Choi, H., and Diebel, P. (2005). "Influence of
plasticizer molecular weight on plasticizer retention in
PVC geomembranes." Geosynthetics International Jour.,
12(2), 99-110. G

geogrid
performance monitoring

■

Measure deformation in geogrid layers

■

Detect development of any underlying sink holes

■

Automated, long-term monitoring

www.geokon.com/geogrids

geokon | Lebanon, NH, USA | +1.603.448.1562

www.GeosyntheticsMagazine.com

11


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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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