Geosynthetics April/May 2021 - 11

strength at yield. More importantly, this
resulted in 100% of the factory-welded
seams passing the project seam strength
requirements, even though the factorywelding speed was 1.1-1.6 times faster
than the field-welding speed. Conversely,
about 25% of the field-welded seams did
not pass the initial specified field seam
shear strength requirement, which caused
significant delays, scheduling problems
and other construction issues. To facilitate field acceptance, the field seam shear
strength requirement was reduced from
7,081 pound-force per foot (9.6 kN/m) to
6,048 pound-force per foot (8.2 kN/m) to
decrease the number of field seams failing
project requirements (Stark et al. 2020).
Because the geomembrane was primarily
factory fabricated, there were about 78%
fewer field seams on this project than if
the geomembrane was entirely field fabricated, which allowed the project schedule
to be achieved.
The constant and favorable factorycontrolled environmental conditions also
reduce the risk of accidents and related
liabilities for workers (Modular Building
Institute). Further, factory fabrication
provides better construction quality management because a factory can implement stringent CQC/CQA programs
with independent inspection and testing
protocols that promote quality for 60%-
100% of the required fabrication process.
As owners and designers look for
more sustainable designs for improved
environmental impact, they will find
that modular construction is inherently more sustainable than field fabrication (Modular Building Institute).
Fabricating in a controlled environment
reduces waste by allowing complex panel

geometries to be created from rectangular rolls and reusing the cut material
without having to clean it or ship it back.
This efficient waste reduction and reuse,
along with improved quality management
throughout the fabrication process and
less on-site activity, promotes sustainability (Modular Building Institute).
For many decades, modular construction has been a part of the geomembrane
industry in the form of factory-fabricated
geomembranes. Modular construction
involves seaming individual rolls of
geomembrane in an off-site, controlled
facility to create large panels or modules
that are assembled at the project site.
Advancements within the industry have
allowed delivery of factory-fabricated and
factory-certified geomembrane panels or
modules to a jobsite, and those materials
can be deployed to cover a large area in
a short period of time (Figure 1). The
deployment of large panels is contrasted

There were about
78% fewer field
seams on this
project than if the
geomembrane
was entirely field
fabricated, which
allowed the
project schedule
to be achieved.

FIGURE 1 Deployment of a large factory-fabricated geomembrane panel
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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
Geosynthetics April/May 2021 - 13
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
Geosynthetics April/May 2021 - 34
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
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Geosynthetics April/May 2021 - 44
Geosynthetics April/May 2021 - Cover3
Geosynthetics April/May 2021 - Cover4
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