Angular stone, thin first lifts, heavy compactors and rough handling cut, scuff and puncture fibers and ribs. Field trials bury samples under the real fill and compaction, dig them up and test their retained strength, and the result becomes an installation damage reduction factor. Coarse, sharp fill can cost a light product a large share of its strength before it carries any service load.
Exhumed samples kept only 70 percent of their strength under that crushed rock, so installation damage goes in at 1.4.
Also heard as
- construction damage
- ID
Related terms
Reduction factor
Number that divides a geosynthetic's index strength to allow for creep, installation damage or degradation in service.
Survivability
A geosynthetic's ability to make it through shipping, placement and compaction without being damaged.
LTDS
Long-term design strength: reinforcement strength left after reductions for creep, installation damage and aging.