Geosynthetics and Geotextiles

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Revision 3 · Aug 26, 2026 +6 −6

Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
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---
title: Geosynthetics and Geotextiles
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## The Contractor shall select and furnish each geosynthetic by the function it performs and the property class required for that function, as scheduled on the drawings or specified herein.
## The Contractor shall not substitute on the basis of trade name or generic description alone. {note}
+## The Contractor shall not substitute on the basis of trade name or generic description alone.
## Predecessor work — clearing, grading, structural fill, and subgrade preparation — is governed by [[sync/earthwork]], and the subgrade delivered by that work is the surface on which geosynthetics under this standard are placed. {note}
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## A conformance statement that asserts compliance without reporting measured values is not an acceptable substitute for a certified test report. {note}
## Reported geotextile strength values shall be minimum average roll values (MARV) unless a typical or maximum value is expressly identified as such. {note}
+## Reported geotextile strength values shall be minimum average roll values (MARV) unless a typical or maximum value is expressly identified as such.
## The minimum lot-testing frequency is one certified test report per manufacturer roll lot; the Engineer of Record may require a higher frequency on public-agency projects. {note}
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### The applicable strength column depends on geotextile elongation at failure: a geotextile with elongation below 50% (typically woven) and one with elongation of 50% or greater (typically nonwoven) carry different minimum strength values for the same survivability class. {note}
### Specifying a woven minimum strength against a nonwoven product, or the reverse, produces a non-compliant submittal even where the product is otherwise suitable; the elongation class shall be confirmed against the strength column applied. {note}
+### Specifying a woven minimum strength against a nonwoven product, or the reverse, produces a non-compliant submittal even where the product is otherwise suitable; the elongation class shall be confirmed against the strength column applied.
### Grab tensile strength shall be determined per ASTM D4632.
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## Coordination of the paving fabric interlayer and the overlay placement is governed in part by [[sync/asphalt-paving]]; the fabric installation shall not proceed ahead of the overlay crew beyond the area that can be paved the same day. {note}
+## Coordination of the paving fabric interlayer and the overlay placement is governed in part by [[sync/asphalt-paving]]; the fabric installation shall not proceed ahead of the overlay crew beyond the area that can be paved the same day.
# Geosynthetic Clay Liner Requirements {toc}
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## Rolls shall be stored off the ground on a clean, dry surface and shall be protected from ultraviolet light, precipitation, mud, chemicals, and temperatures outside the manufacturer's storage range.
## The manufacturer's protective wrapping shall remain on each roll until the roll is installed, because the wrapping is the primary UV and contamination protection during storage. {note}
+## The manufacturer's protective wrapping shall remain on each roll until the roll is installed, because the wrapping is the primary UV and contamination protection during storage.
## Bentonite-bearing GCL rolls shall be protected from any moisture during storage and handling, because premature hydration ruins the product.
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## The manufacturer shall warrant each geosynthetic against defects in materials and manufacture for the period specified below.
## The warranty shall not cover damage resulting from improper installation, ultraviolet exposure beyond the specified limit, or chemical attack by a permeant not disclosed to the manufacturer. {note}
+## The warranty shall not cover damage resulting from improper installation, ultraviolet exposure beyond the specified limit, or chemical attack by a permeant not disclosed to the manufacturer.
### Select the manufacturer's material warranty period.
9 unchanged lines
default: "2"
```

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