1019.01 Geotextile Fabric.
1019.01.1 General Requirements: The geotextile fabric shall be
composed of at least 85 percent by weight of polyolefins, polyesters, or polyamides. The geotextile fabric shall be resistant to chemical attack, rot and mildew and shall have no tears or defects which adversely alter its physical properties. When required, the geotextile fabric shall contain stabilizers and/or inhibitors added to the base material to make filaments resistant to deterioration due to ultraviolet and heat exposure. Edges of geotextile fabric shall be finished to prevent the outer yarn from pulling away from the fabric. Fibers of other composition may be woven into the geotextile fabric for reinforcing purposes. Durability of these fibers shall be equivalent to that of the geotextile fabric. Geotextile fabric rolls shall be furnished with an opaque, waterproof wrapping for protection against moisture and extended ultraviolet exposure prior to placement. Each roll shall be labeled or tagged with the manufacturer's name, date of manufacture, batch number, and name of product. Unless otherwise specified on the plans or in the project specifications, the geotextile fabric shall be from the Approved Materials List.
1019.01.2 Detailed Requirements: The geotextile fabric shall
comply with the requirements in Table 1019-1 and utilized as follows unless otherwise specified: Use Classes
1.Drainage Underdrains A, B, C or D Pipe and Precast Manhole Joints A, B, C or D Weep Holes A, B, C or D Bedding Fabric B, C, or D Approach Slabs B, C, or D Fabric for Geocomposite Drainage Systems1 B, C, or D
2.Stabilization Bulkheads C or D Flexible Revetments C or D Rip Rap D Railroad Crossings D Base Course D Subgrade Layer D Soil Stabilization C, D, or S
3.Paving Fabric2 B or C (modified)
4.Silt Fencing: Wire Supported F Self-Supported G 1Refer to 1019.02 for additional requirements. 2Refer to 1019.03 for additional requirements. Table 1019-1 Geotextile Fabrics Requirements Classes Property Test Method A B C D S F G AOS, Metric Sieve, µm, Max. ASTM D4751 300 300 300 212 600 850 850 Grab Tensile, N, Min. ASTM D4632 330 400 580 800 800 400 400 % Elongation @ Failure, Min. ASTM D4632 — — 50 50 — — — % Elongation @ 200 N, Max. ASTM D4632 — — — — — — 50 Burst Strength, N, Min. ASTM D3787 440 620 930 1290 1390 — — Puncture, N, Min. ASTM D4833 110 130 180 330 330 — — Trapezoid Tear Strength, N, Min. ASTM D4533 110 130 180 220 220 — — Permittivity, Sec.-1, Min. ASTM D4491 1.0 1.0 1.0 1.0 0.2 0.01 0.01 Grab Tensile Strength Retained after weathering 150 h, UVA lamps, %, Min ASTM D4632 ASTM G154 70 70 70 70 70 — — Grab Tensile Strength Retained after weathering 500 h, UVA lamps, %, Min ASTM D4632 ASTM G154 — — — — — 70 70
1019.02 GEOCOMPOSITE DRAINAGE SYSTEMS. The
geocomposite fabric drain shall consist of a nonwoven geotextile fabric and a core as specified below with the geotextile completely enveloping the core. Fittings shall be as recommended by the manufacturer. The geotextile fabric shall be sufficiently secured to the core to prevent separation of the geotextile fabric and intrusion of the backfill material during installation. The geocomposite drainage system shall be from the Approved Materials List.
1019.02.1 Geotextile Fabric: The fabric shall meet the
requirements for Class B, C, or D geotextile fabric of 1019.01 with the following modifications: Property Test Method Requirements Elongation, %, Min. ASTM D4632 20 Sewn Seam Strength (Fabric to Fabric), kN/m width, Min. ASTM D4437 2600
1019.02.2 Cores for Wall Drains (Single Sided): The core
shall be a flexible, solid-backed, rectangular design made of a polyolefin material not sensitive to moisture. The geocomposite design shall allow drainage of water from one side only. The core shall consist of supports having a minimum height of 5/16 inch upon which the fabric shall be securely fastened. The cross section open area of the core which will allow the passage of water shall be a minimum of 40 percent. The core shall meet the following requirements: Property Test Method Requirements Compressive Strength, kPa @ 20% Max. Deflection, Min. ASTM D1621 380
1019.03 PAVING FABRIC. In addition to the specifications for Class B
or C geotextile fabric of 1019.01, the paving fabric shall also comply with the following requirements: Property Test Method Requirements Asphalt Retention, L/sq m AASHTO M 288 0.9 Change in Area at 135°C, %, Max. AASHTO M 288 15.0
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Source: Standard Specifications for Roads and Bridges, 2016 Edition. Pages 1116–1120 of 1,145. View official source ↗