70-Sec 32 05 19.13 - GEOTEXTILE.pdf
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- Bucks County, Pennsylvania
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This is a technical specification document for geotextile materials to be used in the Bristol Township 2026 Road Paving, Inlet Replacement, and Curb Ramp Program in Pennsylvania. The specification establishes requirements for Class 1 geotextile materials that function as permeable separators to prevent intermixing of dissimilar materials between subgrades and pavement surfaces, in accordance with PennDOT Publication 408. The geotextile must be composed of synthetic fibers with at least 85% polyolefins, polyesters, or polyamides by weight and must demonstrate resistance to chemical attack, rot, and mildew.
The approved geotextile materials include Amaco Style 2000, ProPex, or approved equivalents meeting specified physical performance standards including grab tensile strength of 158 pounds, grab elongation minimum of 20%, Mullen burst of 189 psi, puncture resistance of 56 pounds, trapezoidal tear of 6 pounds, and UV resistance of 70% at 150 hours. Installation requirements mandate that geotextile be placed on prepared subgrade areas in loose, unstretched condition with minimum 300-millimeter overlaps at roll ends and edges, and subbase material must be placed within two weeks of fabric installation to minimize exposure. All materials must be kept dry during shipping and storage with protection from ultraviolet light exposure exceeding 14 days, and damaged geotextiles must be immediately replaced per engineer identification. The work shall comply with PennDOT standards and Township specifications.
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Text version
GEOTEXTILE
32 05 19.13-1
SECTION 32 05 19.13
GEOTEXTILE
PART 1 - GENERAL
1.01 SECTION DESCRIPTION
A. This work shall consist of furnishing and placing a Class 1 geotextile for use as a permeable separator to prevent inter-mixing of dissimilar material such as subgrades and surfaced or unsurfaced pavement materials as defined in PennDOT Publication 408 Section 212.3.e. The geotextile shall be designed to allow passage of water while retaining in situ-soil. This specification does not address geotextiles used for reinforcement.
PART 2 - PRODUCTS
2.01 MATERIALS
A. Geotextile shall be composed of synthetic fibers formed into a woven fabric. Fibers used in the manufacture of the geotextile shall be composed of at least 85% weight by polyolefins, polyesters or polyamides. The geotextile shall be resistant to chemical attack, rot and mildew and shall have no tears or defects that will adversely alter its physical properties. The geotextile shall be Amaco Style 2000, ProPex® or approved equal meeting the physical requirements specified in Table 1.
B. TABLE 1: PHYSICAL REQUIREMENTS OF PAVING FABRIC
Properties Test Method American Standard
Grab Tensile ASTM D 4632 158 lb.
Grab Elongation ASTM D 4632 20%(min)
Mullen Burst ASTM D 3786 189 psi
Puncture ASTM D 4833 56 lb.
Trapezoidal Tear ASTM D 4533 6 lb.
UV Resistance ASTM D 4355 70% at 150 hr.
AOS ASTM D 4751 30 sieve
Flow Rate ASTM D 4491 4 gal./min./sq.ft.
PART 3 - EXECUTION
3.01 SHIPPING & STORAGE
A. The geotextile shall be kept dry and wrapped such that it is protected from the elements during shipping and storage. If stored outdoors, the geotextile shall be elevated and protected with a waterproof cover.
At no time shall the geotextile be exposed to ultraviolet light for a period exceeding 14 days. The geotextile rolls shall be labeled in accordance with ASTM D 4873-88, “Standard Guide for Identification, Storage and Handling of Geotextiles.”
3.02 SITE PREPARATION
A. The installation area shall be prepared by clearing all debris or obstructions that may damage the geotextile.
3.03 GEOTEXTILE PLACEMENT
A. Place the fabric on a prepared subgrade area covering the full width of the subbase layer being protected. Place fabric in a loose and unstretched condition to minimize shifting, puncture, and/or tearing of the fabric. Overlap fabric roll-ends and edges a minimum of 300 mm (12 inches) with adjacent material. Place subbase material within 2 weeks after placement of fabric to minimize exposure. Place subbase material in a manner to minimize slippage of the fabric.
B. Damaged geotextiles, as identified by the Engineer, shall be replaced immediately.
END OF SECTION
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