Geosynthetics February/March 2021 - 19

an upstream-facing BGM liner to minimize seepage through the structure. A
deep cutoff trench to anchor the liner at
the base in front of the dam over frozen
ground was used to minimize the potential seepage through the dam foundation.
To ensure permafrost was retained in the
foundation, the foundation preparation,
liner placement and covering were carried out from January through March
and late October through December,
when ambient temperatures were often
near -40°F (-40°C). Installation of the
liner was carried out through all seasons. Every extension of the rockfill dam
from 2006 until today is watertight with
a BGM of 0.2-inch (5.1-mm) thickness
(Figure 7).

BGM has advantages not only in
cold weather conditions but also in hot
weather conditions. It is effective in temperatures ranging from -49°F to 194°F
(-45°C to 90°C).
In Ireland, RUSAL Alumina is a
large bauxite processing plant based in
the southwestern part of the country.
The clarifier pond had been badly leaking for quite a while due to inadequate
performance of the existing HDPE geomembrane, which must store high-temperature liquid at 194°F (90°C). BGM
uses a special bitumen compound with a
temperature of penetration, which measures the penetration of a needle (test
NFT 666004 or BS 200: Part 49), of 266°F
(130°C). To meet the plant's waste license

FIGURE 7 Cold weather installation at the
Kinross Kupol Gold Mine in Russia

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www.GeosyntheticsMagazine.com

17


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Geosynthetics February/March 2021

Table of Contents for the Digital Edition of Geosynthetics February/March 2021

Geosynthetics February/March 2021 - 1
Geosynthetics February/March 2021 - 2
Geosynthetics February/March 2021 - 3
Geosynthetics February/March 2021 - 4
Geosynthetics February/March 2021 - 5
Geosynthetics February/March 2021 - 6
Geosynthetics February/March 2021 - 7
Geosynthetics February/March 2021 - 8
Geosynthetics February/March 2021 - 9
Geosynthetics February/March 2021 - 10
Geosynthetics February/March 2021 - 11
Geosynthetics February/March 2021 - 12
Geosynthetics February/March 2021 - 13
Geosynthetics February/March 2021 - 14
Geosynthetics February/March 2021 - 15
Geosynthetics February/March 2021 - 16
Geosynthetics February/March 2021 - 17
Geosynthetics February/March 2021 - 18
Geosynthetics February/March 2021 - 19
Geosynthetics February/March 2021 - 20
Geosynthetics February/March 2021 - 21
Geosynthetics February/March 2021 - 22
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Geosynthetics February/March 2021 - 24
Geosynthetics February/March 2021 - 25
Geosynthetics February/March 2021 - 26
Geosynthetics February/March 2021 - 27
Geosynthetics February/March 2021 - 28
Geosynthetics February/March 2021 - 29
Geosynthetics February/March 2021 - 30
Geosynthetics February/March 2021 - 31
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Geosynthetics February/March 2021 - 33
Geosynthetics February/March 2021 - 34
Geosynthetics February/March 2021 - 35
Geosynthetics February/March 2021 - 36
Geosynthetics February/March 2021 - 37
Geosynthetics February/March 2021 - 38
Geosynthetics February/March 2021 - 39
Geosynthetics February/March 2021 - 40
Geosynthetics February/March 2021 - 41
Geosynthetics February/March 2021 - 42
Geosynthetics February/March 2021 - 43
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Geosynthetics February/March 2021 - 45
Geosynthetics February/March 2021 - 46
Geosynthetics February/March 2021 - 47
Geosynthetics February/March 2021 - 48
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