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INSTALATION DAMAGE
TRI performs installation damage testing
services to characterize the construction damage imparted to a geosynthetic
as a function of installation. TRI has adopted a convenient method
for applying installation damage to geosynthetics that allows for
exhumation of the test samples while avoiding unintended damage.
The method was developed and reported by Watts and Brady (1994)
of the Transport Research Laboratory in the United Kingdom. TRI
uses this procedure as modified to generally conform to ASTM D 5818
requirements.
The following construction quality
control measurements are followed during exposure:
 Sieve analyses,
as well as Proctor density and Atterburg limits analyses, as applicable,
are performed on each soil/aggregate.
Lift thickness
measurements are made after soil/aggregate compaction.
Moisture and
density measurements are made on each lift using a nuclear density
gage to confirm that densities >90% of modified Proctor (per
ASTM D 1557) were being achieved.
Each geosynthetic is exposed to soils/aggregates
chosen by the client from a range of available TRI maintained stockpiles
having different gradations and representing fine grain sands to
large angular gravels. Detailed particle size distribution curves
and pictures are available for review.
Relevant Standards
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ISO/TR 10722
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Procedure for
Simulating Damage During Installation
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ISO 13437
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Method for
Installing and Extracting Samples in Soil, and Testing Specimens
in the Laboratory
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ASTM D 5818
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Obtaining Installation
Damage Samples)
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