TEXTILES.ORG
Geogrids
January 1st, 1970
Geogrid products are designed for reinforcement and, characteristically, are integrally connected to elements separated by in-plane apertures. Geogrids form a distinct category of geosynthetics designed for reinforcement. These products are characterized by a relatively high tensile strength and a uniformly distributed array of large apertures (openings between the longitudinal and transverse elements). The apertures allow […]
Geosynthetic clay liners (GCLs)
January 1st, 1970
Bonding clay to geosynthetic materials has created an economical, long-term solution for many applications. Geosynthetic clay liners (GCLs) are hydraulic barriers made of clay bonded to a single geosynthetic layer or to multiple geosynthetic layers. Because of its low permeability, swelling capacity and relative abundance, natural sodium bentonite is the preferred clay component of GCLs. […]
Drainage materials
January 1st, 1970
Geonets, sheet drains, edge drains, and prefabricated vertical drains are all designed to offer strong, performance-enhancing alternatives to traditional drainage systems. Geocomposite drainage systems are engineered to minimize costly, conventional graded-aggregate and/or perforated-pipe subsurface drainage systems. Geonets, sheet drains, pavement edge drains and prefabricated vertical drains (PVDs) have reached acceptance as state-of-the-practice because they provide […]
Geocells
January 1st, 1970
Geocells are engineered for protection and stabilization applications. They are often used to help improve the performance of standard construction materials and erosion-control treatments. Geocell products are three-dimensional, expandable panels made from high-density polyethylene (HDPE), polyester or another polymer material. When expanded during installation, the interconnected strips form the walls of a flexible, three-dimensional cellular […]
Erosion control materials
January 1st, 1970
These products are designed to help solve erosion- and sediment-control problems and to provide long-term stabilization by establishing and maintaining vegetative cover. Erosion-control products give engineers ready solutions for one of the fastest-growing design niches. Many of these products work with vegetation to form a biocomposite solution to erosion. The charts in this section are […]
Geosynthetics in the Greater Grand Forks Greenway
January 1st, 1970
By Adam Regn Arvidson The turf reinforcement mat (TRM) in the Red River Greenway project is Enkamat, manufactured by Colbond, a Dutch company with production facilities in Europe and the U.S. The 3-dimensional nondegradable matting is made of continuous nylon or polypropylene filaments fused at their intersections, with 95% of the matting open. The 3-D […]
Strength without density: Geofoam at work on the CAS green roof
January 1st, 1970
An innovative redesign transforms the California Academy of Sciences. By Shelby Gonzalez Introduction The California Academy of Sciences (CAS) in San Francisco has completed a transformation. Its innovative redesign has already gained international recognition as a cultural icon. Under one “living roof,” the new Academy contains a planetarium, an aquarium, and a natural history museum. […]
First artificial surf reef in Europe
January 1st, 1970
Work is nearly completed in the building of Europe’s first artificial surf reef near Dorset in southwest England. The project, estimated at £2.7 million (ca. $5.4 million U.S.), is designed to double the size of the waves at Boscombe, Bournemouth, to 4m (13ft) as well as greatly increase the number of good surfing days. Kerry […]
Geotextiles in unpaved roads: A 35-year case history
January 1st, 1970
By William M. Hawkins Abstract This article presents current information on geotextiles installed experimentally in an unpaved road 35 years ago. In 1972, geotextiles were largely untested, and the site was set up as an accelerated field test to determine the comparative performances of several fabrics for use as a geotextile. But because the site […]
What is GRS? (Geosynthetic-reinforced soil)
January 1st, 1970
The soil mass of GRS systems is reinforced in layers with a polymeric geosynthetic (e.g., geogrids or geotextiles), and the layered reinforcement is attached to facing elements that constitute the outer wall. Because the facing elements are commonly composed of articulated units that are not rigidly attached to each other, the wall is deemed flexible. […]