Geoysynthetics August/September 2023 - 13
only 24 hours of cure time. This is why values
are always lower in the field compared to
those tested in the lab a few days later.
This issue could be solved in one of two
ways as follows:
Option 1: revisions to GRI GM19a.
Note 6: to be added to section 5.1 page
4 of 13 of specification, Note 6: Test seam
strength values in tables 1a & b, 2a & b and
3a & b are based on " actual " thickness values
rather than " nominal " thickness values of the
geomembrane seamed.
Option 2: revisions to GRI GM13 and GM17
Note to be added: When working with a
textured geomembrane with a smooth
edge, the smooth edge of the textured
geomembrane must meet specification
for the requested nominal thickness of
smooth geomembrane.
(Struve, F. and Koerner, G. R. (2005) " Behavior of HDPE
geomembrane sheet and seams subjected to a 90-degree
tensile test, " GRI-18 proceeding, Philadelphia, Pa.)
SEEDING PROCEDURES FOR
EROSION CONTROL BLANKETS
AND TURF REINFORCEMENT MATS
Q: Do I seed below or above erosion control blankets
(ECBs) or turf reinforcement mats (TRMs)?
A: Ouch! This is a trick question. There are different
seeding procedures for ECBs and TRMs.
For ECBs, it is always better to seed first, then
install the ECB. This puts the seed directly
on the soil (where the moisture is), giving it
optimal conditions for germination. The only
seed that can be effectively applied over
blankets would be " open " style blankets such as
jute. Hydroseeding methods can be effective
over some ECB only if they have moistureholding
properties. With TRM, the TRM is
placed on the subgrade and then infilled with
topsoil. Subsequent to the soil infill, the seed
is placed and allowed to germinate. Sod is
sometimes placed on the infilled TRM very
effectively. Remember, the TRM provides a
3D structure for stabilization of the grass root
system over time. G
>> For more, search Techline at
GeosyntheticsMagazine.com
or email your technical questions
to gmatechline@textiles.org.
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Geoysynthetics August/September 2023
Table of Contents for the Digital Edition of Geoysynthetics August/September 2023
Geoysynthetics August/September 2023 - Cover1
Geoysynthetics August/September 2023 - Cover2
Geoysynthetics August/September 2023 - 1
Geoysynthetics August/September 2023 - 2
Geoysynthetics August/September 2023 - 3
Geoysynthetics August/September 2023 - 4
Geoysynthetics August/September 2023 - 5
Geoysynthetics August/September 2023 - 6
Geoysynthetics August/September 2023 - 7
Geoysynthetics August/September 2023 - 8
Geoysynthetics August/September 2023 - 9
Geoysynthetics August/September 2023 - 10
Geoysynthetics August/September 2023 - 11
Geoysynthetics August/September 2023 - 12
Geoysynthetics August/September 2023 - 13
Geoysynthetics August/September 2023 - 14
Geoysynthetics August/September 2023 - 15
Geoysynthetics August/September 2023 - 16
Geoysynthetics August/September 2023 - 17
Geoysynthetics August/September 2023 - 18
Geoysynthetics August/September 2023 - 19
Geoysynthetics August/September 2023 - 20
Geoysynthetics August/September 2023 - 21
Geoysynthetics August/September 2023 - 22
Geoysynthetics August/September 2023 - 23
Geoysynthetics August/September 2023 - 24
Geoysynthetics August/September 2023 - 25
Geoysynthetics August/September 2023 - 26
Geoysynthetics August/September 2023 - 27
Geoysynthetics August/September 2023 - 28
Geoysynthetics August/September 2023 - 29
Geoysynthetics August/September 2023 - 30
Geoysynthetics August/September 2023 - 31
Geoysynthetics August/September 2023 - 32
Geoysynthetics August/September 2023 - 33
Geoysynthetics August/September 2023 - 34
Geoysynthetics August/September 2023 - 35
Geoysynthetics August/September 2023 - 36
Geoysynthetics August/September 2023 - 37
Geoysynthetics August/September 2023 - 38
Geoysynthetics August/September 2023 - 39
Geoysynthetics August/September 2023 - 40
Geoysynthetics August/September 2023 - 41
Geoysynthetics August/September 2023 - 42
Geoysynthetics August/September 2023 - 43
Geoysynthetics August/September 2023 - 44
Geoysynthetics August/September 2023 - Cover3
Geoysynthetics August/September 2023 - Cover4
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