Specification Section: Geosynthetics
Geosynthetic materials are made to stabilize terrain and be used in construction and environmental projects for separation, pavement and earth reinforcement, filtration, drainage, and/or containment. Products include geotextiles, geomembranes, geocells, geocomposites, geogrids, geonets, geosynthetic clay liners, geotextile tubes, pavement edge drains, prefabricated vertical (wick) drains and sheet (wall) drains. This brief listing is meant to introduce you to manufacturers and suppliers with a Website address to immediately access further information. If your company should have been included, let us know at firstname.lastname@example.org, and we’ll add you.
Advanced Drainage Systems Inc. (www.ads-pipe.com) and its Biaxial (BX) Geogrids have been successfully designed for soil stabilization, base reinforcement and subgrade improvement. Biaxial geogrids offer improved road reinforcement, parking lots and even airport runways where stresses are in two directions. The BX Series Biaxial Geogrids are produced from polypropylene (PP) using punched and drawn technology, and they’re available in six versions. The full ADS BX Geogrids product line includes BX11, BX12, BX13, BX15, BX41 and BX42. The more common BX11 and BX12 are available in 9.8’, 13.1’ and 16.0’ widths. Geogrids enhance pavement life and stabilize soft soils as well as save money due to reduced aggregate thickness, subgrade material thickness and undercuts.
American Excelsior Co. (www.americanexcelsior.com) creates Recyclex turf-reinforcement mat (TRM) and Recyclex TRM-V, which are made from 100-percent post-consumer recycled fibers from green or brown plastic bottles. According to the company, the crimped fibers provide a strong, curled, interlocking fiber matrix that conforms to terrain and reduces water-flow velocity. Recyclex fibers are stitched together by two layers of UV-resistant polypropylene netting to form a 3-D matrix designed to provide permanent surface support for vegetation and structural root systems. Recyclex products are engineered for channels and slopes that require permanent vegetation reinforcement.
Conwed (www.conwedplastics.com) has a line of soil-stabilization products that includes NetPave, a permeable-grass paving system manufactured from 100-percent recycled polyethylene. NetPave is engineered to provide durability and flexibility to help conform to irregular surfaces and gradients. Applications include parking areas, emergency-vehicle access roads, and pathways where traffic can cause erosion and damage to the grass and landscape. According to the company, NetPave permeable pavers reduce stormwater runoff and increase infiltration with the strength and durability of impervious pavements such as concrete and asphalt.
Cooley Engineered Membranes, a division of Cooley Group (www.cooleygroup.com), has a number of sustainable, high-performance engineered membranes. At the core of its diverse product solutions are geomembranes (reservoir liners, floating covers, primary/secondary commercial containment), reinforced geomembranes (available in up to five-meter segments), and waterproofing (below grade/tunnels). The company recently introduced the Oasis Floating Cover, with UV protection for an extended life, backed with a 30-year warranty. Also arriving in 2015 will be the Enviroflex RPE, a high-strength reinforced flexible polyethylene available in roll widths up to five meters; and the Coolguard PW, a high-performance, coated barrier fabric made with DuPont Elvaloy engineered for potable water applications and certified to NSF Standard 61 for potable water usage.
Drainage Products, Inc. (www.drainaway.com) offers Drain Away, a prefabricated geocomposite drain consisting of a cuspated plastic core enveloped by a non-woven geotextile filter fabric. Water flows through the fabric from either side and into the voids created by the plastic core, where it is collected and carried away in a perforated pipe inserted in the bottom of the fabric envelope. According to the company, Drain Away can lower the water table without the labor and costs of aggregate and is ideal for site drainage, road construction, curtain drains, foundations, retaining walls and slopes.
GSE Environmental Inc. (www.gseworld.com) offers a wide range of geonet and geocomposite drainage systems to complement or replace sand, stone and gravel. If you require filtration to keep silt and soil particles from clogging flow or increase friction characteristics, GSE offers geocomposites consisting of a geonet that’s heat-bonded with a nonwoven needle-punched geotextile.
Hancor (www.hancor.com) offers a full selection of non-woven and woven fabrics for drainage, separation, stabilization or soil-reinforcement applications. In addition, Hancor’s woven silt fence geotextile product is available for use in road and sediment-control projects to distribute loads, reduce rutting and extend the life of a road.
Industrial Textiles and Plastics (www.itpltd.com) is a UK manufacturer of geomembranes including a range of methane and radon barriers. Included in this range is the Puraflex hydrocarbon barrier that shows exceptional resistance and impermeability to VOC compounds. Results of a local soil analysis can be downloaded into their sofware program, which then provides exact permeation data for over 200 potential contaminants. Applications include contaminated land protection, secondary containment and tunnel lining.
Layfield (www.layfieldgroup.com) distributes Geoweb and E’GRID Biaxial Geogrids. Geoweb improves load-bearing capacity and prevents lateral spreading. E’GRID Biaxial Geogrids increase the shearing resistance of soil and are applicable with any type of mechanical fill material for surface roads or rails, including embankment, slope and pavement applications.
Poly-Flex Inc. (www.poly-flex.com) creates blown-film textured geomembrane liners with smooth edges that eliminate the concern of minimizing texturing to optimize welding. Additional personnel are not required to clean dirt and moisture from the seaming surface. According to the company, the smooth edges can be seamed with a wedge welder at speeds up to four times faster than textured sheet without smooth edges. In addition, blown-film texturing provides increased friction angles for greater stability on steep-slope applications.
Polymer Group Inc. (PGI) (www.typargeosynthetics.com) manufactures TYPAR Geosynthetics nonwoven geotextiles. TYPAR has long been regarded as a technological innovator with a strong portfolio of intellectual property. Polymer Group Inc has a strong market position in many of its product and application areas, using a variety of leading manufacturing technologies, including several proprietary processes. Some of their other product lines include BodPave85, TurfProtecta, GrassProtecta, Pathmat, Biobarrier, Tubex Tree Shelters, Protectamesh HD Rockshield, Typar Geocells, Typar Geotextiles and Typar Landscape Fabric.
Propex Geosynthetics (armormax.geotextile.com) manufactures ArmorMax Anchored Reinforced Vegetation System for severe erosion challenges. The system consists of Propex’s woven 3-D High-Performance Turf-Reinforcement Mat with X3 fiber technology and earth-percussion anchors. ArmorMax can be used in non-structural applications, including protecting earthen levees from storm surge and wave overtopping; stream, river and canal banks from scour and erosion; and stormwater channels in arid/semi-arid environments. Propex says ArmorMax can be engineered to provide surficial slope stabilization to resist shallow-plane failures.
Seaman Corp. (www.seamancorp.com) has been applying its XR geomembrane technology for more than 25 years. The company has a long record of successful installations containing a variety of harsh liquids. XR technology is used in all types of applications, including pond liners, secondary containment, floating covers, wastewater baffles and potable water containment.
Strata Systems Inc. (www.geogrid.com) manufactures and distributes worldwide advanced soil-reinforcement products, including Stratagrid, StrataSlope, StrataWall, StrataTex, StrataDrain, StrataBase, StrataWeb cellular confinement system and the Sleeve-It System (rail-integration device), which is a code-compliant, fence-post anchoring system that integrates stable fence footings into the support structure of retaining walls. These advanced soil-reinforcement products deliver system solutions for MSE retaining walls, reinforced steep slopes, embankments over soft soils and load-support applications. Strata’s technical resources and support ensure innovative geo-solutions.
TenCate Geosynthetics (www.mirafi.com) offers many woven and nonwoven geotextiles in its Mirafi product line, which enables designers to provide the most economical and efficient design for subgrade stabilization and base-reinforcement applications. These geotextiles are used in environmental applications such as critical subsurface drainage systems, soil separation, permanent erosion control, and protection of HDPE and other geomembranes in landfill construction. According to the company, these products provide the required puncture strength and abrasion resistance to withstand installation and application stresses to create an effective long-term solution.
Tensar North American Green (www.tensarcorp.com) develops, produces and distributes a complete line of high-quality erosion and sediment-control systems to meet the specific erosion control, sediment control, hydraulic, scour protection and/or vegetation reinforcement needs of nearly any application.
Watersaver (www.watersaver.com) provides a wide variety of slope-stabilization grids, nets and geotextile products coupled with impermeable geomembrane liners made from PVC, polypropylene, reinforced linear low-density polyethylene, Hypalon and XR-5. In business since 1953, Watersaver has fabricated more than 1.8 billion square feet of geomembrane liner.