Attachment 5 - Geotextile Fabric- Specifications.pdf

FA301022R0028 Attachment 5 Geotextile Fabric for Drainage Pipe Wrap Specification

1.0 GENERAL

This section covers the technical requirements for the manufacturing and installation of a geotextile for Drainage Pipe Wrap.

2.0 GEOTEXTILE

2.1 MEASUREMENT

2.1.1 Measurement for the geotextile is in square yards, based upon the locations shown on the drawings.

2.1.2 Contractor is responsible for determining actual square yards required accounting for waste, overlaps, damaged materials and repairs.

2.2 REFERENCES

2.2.1 American Society for Testing and Materials (ASTM)

2.2.2 ASTM D 5261, Standard Test Method for Measuring Mass per Unit Area of Geotextiles

2.2.3 ASTM D 4632, Standard Test Method for Grab Breaking Load and Elongation of Geotextiles

2.2.4 ASTM D 6241, Standard Test Method for Static Puncture Strength of Geotextiles and Geotextile-Related Products Using a 50-mm Probe

2.2.5 ASTM D 4533, Standard Test Method for Index Trapezoidal Tearing Strength of Geotextiles

2.2.6 ASTM D 4751, Standard Test Method for Determining Apparent Opening Size of a Geotextile

2.2.7 ASTM D 4491, Standard Test Method for Water Permeability of Geotextiles by Permittivity

2.2.8 ASTM D 4355, Standard Test Method for Deterioration of Geotextiles by Exposure to Light, Moisture and Heat in a Xenon Arc Type Apparatus

2.2.9 ASTM D 4354, Standard Practice for Sampling of Geosynthetics for Testing

2.2.10 ASTM D 4759, Standard Practice for Determining the Specifications Conformance of Geosynthetics

2.2.11 In Compliance with Mississippi DOT 2017 Standard Specifications and Roadway Design Standards

2.3 GEOTEXTILE PROPERTIES

2.3.1 The geotextile shall be a needle-punched nonwoven made of 100% polypropylene staple filaments that resists ultraviolet and biological deterioration, rotting, naturally encountered basics and acids.

2.3.2 Geotextile shall be produced by a manufacturer participating in the NTPEP

PROJECT WORK PLAN FOR GEOTEXTILE MATERIALS FOR HIGHWAY

APPLICATIONS.

Attachment D

2.3.3 The geotextile shall be a needle-punched nonwoven made of 100% polypropylene staple filaments that resists ultraviolet and biological deterioration, rotting, naturally encountered basics and acids.

Property Test Method English Metric

Weight ASTM D-5261 4.5 oz/y² 152.55 g/m²

Grab Tensile Strength ASTM D-4632 120 lbs 534 N

Elongation @ Break ASTM D-4632 50 % 50 %

Mullen Burst ASTM D-3786 225 psi 1,551 kPa

Pin Puncture ASTM D-4833 65 lbs 289 N

CBR Puncture ASTM D-6241 340 lbs 1,513 N

Trapezoidal Tear ASTM D-4533 50 lbs 223 N

Apparent Opening Size ASTM D-4751 70 US Sieve 0.21 mm

Permittivity ASTM D-4491 1.7 Sec⁻¹ 1.7 Sec⁻¹

Water Flow Rate ASTM D-4491 135 g/min/f² 5,500 l/m/m²

UV Resistance @ 500 Hours ASTM D-4355 70 % 70 %

2.4 LABELING AND PRINTING

2.4.1 Geotextiles shall be labeled per NTPEP GTX-01-15 guidelines.

2.4.2 Each unique geotextile shall be permanently marked with clearly legible print showing, as a minimum, the manufacturing plant or manufacturing plant ID code numbers.

2.4.3 This marking shall be located on the roll edge of the product in the selvedge at a frequency of once per 16.4 ft.

2.4.4 Labels shall be affixed by the product manufacturer to both ends of the outside of the geotextile roll outer wrapping and both ends of the inside of the geotextile roll core where they are easily visible for inspection, and shall be attached in a manner that would make the label difficult to remove or replace.

2.4.5 As a minimum, the label shall contain the following additional information about the product and its production:

2.4.5.1 The roll number, its production date, AASHTO M288 class(es) the product meets (or “NTPEP listed” if no class applies), and the product name.

2.4.5.2 If the manufacturer is supplying the product to a private label company, the product name is the one that will be used by the private label company.

2.4.5.3 If the permanent mark described above contains all the information required for the labels, the labels on one end of the roll may be eliminated.

2.5 SUBMITTALS

2.5.1 For products which are not pre-approved, the contractor shall provide to the

Engineer a certificate stating the name of the manufacturer, product name, style number, chemical composition of the product and other pertinent information to fully describe the geosynthetic. The Certification shall state that the furnished geosynthetic meets MARV requirements of the specification as evaluated under the Manufacturer’s quality control program. The Certification shall be attested to by a person having legal authority to bind the Manufacturer.

2.6 QUALITY ASSURANCE

2.6.1 Upon delivery to the project site, the contractor shall examine the geotextile rolls and report any damage or deviations from project specifications to the project engineer.

2.6.1.1 Geotextile rolls shall arrive wrapped in a UV protective film and without deep gashes or punctures resulting from handling.

2.6.2 Before unwrapping and deploying, the contractor shall record on a separate ledger the roll number of every geotextile roll received on the jobsite.

2.6.3 Upon project engineer’s request, contractor shall provide actual test results for every roll delivered to the project site.

2.6.4 The project engineer may decide to arrange conformance testing of the rolls delivered to the project site.

2.6.4.1 For this purpose, the engineer shall take a sample three feet (along roll length) by roll width according to ASTM Practice D 4354.

2.6.4.2 The sample shall be rolled (not folded), properly marked, wrapped and sent to an independent, GAI-LAP accredited laboratory for conformance testing.

2.6.4.3 The pass or fail of the conformance test results shall be determined according to ASTM Practice D 4759.

2.6.4.4 Individual conformance test results falling below published minimums shall not soley define failed production.

2.6.4.4.1 “Minimum average roll value” (MARV) requires that 97.5% of all material produced should meet or exceed a given MARV.

2.6.4.4.2 In cases of failure, duplicate tests shall be run on the material in question to determine if the problem is in the test procedure.

2.7 TRANSPORT

2.7.1 Transportation of the geotextile shall be the responsibility of the contractor.

2.7.2 During shipment, the geotextile shall be protected from moisture, ultraviolet radiation, puncture, chemicals that are strong acids or bases, temperatures in excess of 140ºF or other damaging or deleterious conditions.

3.0 INSTALLATION

3.1 TRENCH EXCAVATION

3.1.1 Trench excavation shall be done in accordance with the project plans.

3.1.1.1 Excavation shall be done without creating large voids in the sides or on the bottom of the trench.

3.1.1.2 Any created voids shall be filled with select granular fill and compacted.

3.1.1.3 The graded surface shall be smooth and free of deleterious materials such as sharp objects or large protruding rocks that could cause the geotextile to tear.

3.1.1.4 Trench shall have a minimum ½ % slope towards the discharge area.

3.2 PLACE FILTRATION GEOTEXTILE

3.2.1 Filtration geotextile shall be placed directly in the prepared trench.

3.2.1.1 Geotextile shall be placed in a manner that minimizes folds and creases.

3.2.1.2 There shall be no voids between the geotextile and subgrade.

3.3 OVERLAPPING

3.3.1 Successive sheets of geotextile shall be overlapped a minimum of 1 foot with the up flow sheet overlapping the down flow sheet.

3.4 PLACE AND COMPACT AGGREGATE

3.4.1 Placement of drainage aggregate shall proceed immediately following geotextile placement.

3.4.2 The geotextile shall be covered with a minimum of 12 inches of loosely placed aggregate prior to compaction.

3.4.3 Trench shall be filled to 6 inches below grade.

3.4.4 If a perforated drain pipe will be used:

3.4.4.1 An aggregate bedding layer of 4 inches depth shall be placed before installing pipe and placing remaining drainage aggregate.

3.4.4.2 Pipe shall be a minimum 4 inch diameter, perforated, PVC pipe.

3.4.4.3 The perforated pipe shall be installed with the perforations facing down.

3.5 FOLD OVER GEOTEXTILE

3.5.1 Geotextile shall be folded over the top of drainage aggregate.

3.5.1.1 For trenches greater than 1 foot in width, the geotextile shall be folded over the top a minimum of 1 foot.

3.5.1.2 For trenches between 1 foot and 3 inches in width, the geotextile shall be folded over equal to the width of the trench.

3.5.1.3 For trenches 3 inches or smaller, the geotextile shall be field sewn or otherwise bonded per project guidelines.

3.6 AGGREGATE

3.6.1 Aggregate shall be washed stone with a minimum diameter of ¾ inches and a maximum diameter of 2 inches.

3.7 PLACE SOIL

3.7.1 Place suitable soil to match grade on top of folded geotextile.

3.8 REPAIR

3.8.1 Damaged areas shall be overlapped according to section 3.3.

3.9 STORAGE

3.9.1 Upon delivery to the project site, the contractor shall insure geotextile rolls are adequately protected from, moisture, ultraviolet radiation, chemicals that are strong acids or bases, temperatures in excess of 140ºF and animal destruction.

3.9.2 If stored outdoors for a prolonged period, contractor shall elevate the geotextile from the ground and cover with a tarpaulin or opaque plastic.

3.9.3 Exposure of the geotextile to the elements following lay down shall be limited to 14 days.