PART 2 - PRODUCTS
2.1 GENERAL
A. The Drainage Geocomposite shall meet the performance requirements of this
section. CONTRACTOR may select from either a geonet geocomposite or a
multi-liner geocomposite.
2.2 MULTI-LINEAR DRAINAGE GEOCOMPOSITE
A. Material Description
1. Multi-Linear Drainage Geocomposite shall consist of two geotextile layers
comprised of short synthetic staple fibers of 100% polypropylene or
polyester needle-punched together with perforated corrugated
polypropylene pipes (mini-pipes) regularly spaced inside.
2. The perforated polypropylene pipes shall function as the primary fluid
conveyance. The pipes shall be corrugated with two perforations per
corrugation at 180° and alternating at 90°.
B. Multi-Liner Drainage Geocomposite Properties
1. The components of the Multi-Linear Drainage Geocomposite specified
shall meet or exceed the values provided in the table below.
MANUFACTURING QUALITY CONTROL TEST REQUIREMENTS
CHARACTERISTIC | STANDARD — | UNIT | | MARV
Mini-pipe Properties
Outside diameter ASTM D2122 mm (in) 25 (1.0)
Stiffness at 5% deflection ASTM D2412 kPa (psi) 3000 (435)
Geotextile Properties (each component)
Mass Per Unit Area ASTM D5261 g/m? (oz/yd?) 270 (8)
Grab Tensile Strength ASTM D4632 N (lb) 979 (220)
Trapezoidal Tear Strength ASTM D4533 N (lb) 400 (90)
Puncture CBR ASTM D6241 N (lb) 2670 (600)
AOS@ ASTM D4751 mm (US sieve) | <0.18 (80)
Permittivity ASTM D4491 sec! 21.26
Geocomposite Properties
Transmissivity (2) | ASTMD4716 | m2/sec | 1.0x10°3
Notes:
(1) Maximum Average Value.
(2) Measured at a minimum seating time of 100 hours, with a test section including Drainage Sand
above the Drainage Geocomposite and textured 60-mil textured HDPE below, using a gradient
of 0.1 under a compressive stress of 12,000 psf for 100 hours.
File No. 3066.09 Drainage Geocomposite 02520 - 2 of 5 December 2017
