geosynthetic

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geosynthetic

[‚jē·ō·sin′thed·ik]
(civil engineering)
Any synthetic material used in geotechnical engineering, such as geotextiles and geomembranes.

Geosynthetic

Any synthetic material used in geotechnical engineering.

Geotextiles are used with foundations, soils, rock, earth, or other geotechnical material as an integral part of a manufactured project, structure, or system. These textile products are made of synthetic fibers or yarns and constructed into woven or nonwoven fabrics that weigh from 3 to 30 oz/yd2 (100 to 1000 g/m2). Geotextiles are more commonly known by other names, for example, filter fabrics, civil engineering fabrics, support membranes, and erosion control cloth.

Permeable geotextiles perform three basic functions in earth structures: separation, reinforcement, and filtration. Such geotextiles can thus be adapted to numerous applications in earthwork construction. The major end-use categories are stabilization (for roads, parking lots, embankments, and other structures built over soft ground); drainage (of subgrades, foundations, embankments, dams, or any earth structure requiring seepage control); erosion control (for shoreline, riverbanks, steep embankments, or other earth slopes to protect against the erosive force of moving water); and sedimentation control (for containment of sediment runoff from unvegetated earth slopes).

A geomembrane is any impermeable membrane used with soils, rock, earth, or other geotechnical material in order to block the migration of fluids. These membranes are usually made of synthetic polymers in sheets ranging from 0.01 to 0.14 in. (0.25 to 3.5 mm) thick. Geomembranes are also known as flexible membrane liners, synthetic liners, liners, or polymeric membranes.

Early liners included clay, bentonite, cement-stabilized sand, and asphalt. Modern geomembranes are commonly made of medium-density polyethylenes that are very nearly high-density polyethylenes (HDPE), several types of polyvinyl chloride (PVC), chlorosulfonated polyethylene (a synthetic rubber), ethylene propylene diene monomer (EPDM), and several other materials. Some geomembranes require reinforcement with an internal fabric scrim for added strength, or plasticization with low- molecular-weight additives for greater flexibility.

Geomembranes are able to contain fluids, thus preventing migration of contaminants or valuable fluid constituents. Since they prevent the dispersal of materials into surrounding regions, geomembranes are often used in conjunction with soil liners, permeable geotextiles, fluid drainage media, and other geotechnical support materials. The major application of geomembranes has been containment of hazardous wastes and prevention of pollution in landfill and surface impoundment construction. They are also used to a large extent in mining to contain chemical leaching solutions and the precious metals leached out of ore, in aquaculture ponds for improved health of aquatic life and improved harvesting procedures, in decorative pond construction, in water and chemical storage-tank repair and spill containment, in agriculture operations, in canal construction and repair, and in construction of floating covers for odor control, evaporation control, or wastewater treatment through anaerobic digestion. See Hazardous waste

References in periodicals archive ?
22 December 2017 - Canada-based geosynthetics producer Groupe Solmax has acquired Texas, US-based GSE Environmental- from Connecticut, US-based private investment firm Littlejohn and Co.
The International Geosynthetics Society Australasian Chapter (ACIGS) will host a multi-city seminar series on drainage geocomposite systems.
Geosynthetics help reinforce soil, distribute loads, prevent soil erosion, and control water pressure.
The company also produces a stress-relieving product for asphalt overlays, and offers a range of geosynthetics.
As a leading geosynthetics supplier, Huesker is keeping its finger on the pulse of the Environmental Protection Agency (EPA) regulations regarding coal combustion residuals (CCRs).
The overall goal of this study was to demonstrate the benefits of geosynthetics reinforcement and lime stabilization for clayey pavement subgrade with high water content, with the detailed objective of this study being to compare the performance of geocell reinforcement, geotextile reinforcement, and lime stabilization by using these treatments solely and together.
com)-- The global Geosynthetics market is projected to reach $19.
With a capacity of over 100mn m 2 , Mattex Geosynthetics is able to supply to the whole GCC railway network.
Leading Middle East geosynthetics producer Alyaf Industrial Company Limited has announced it is expanding its annual manufacturing capacity with the addition of a fourth line by the end of next year.
Global demand for geosynthetics is expected to rise 8.
USPRwire, Fri Nov 15 2013] Geosynthetics Market by Types (Geotextile, Geomembrane, Geogrid, Geofoam, Geonet), Applications (Road Industry, Railroad Stabilization, Water Management, Waste Management, Mining, Soil Reinforcement, Erosion Control) & Geography - Global Trends & Forecasts to 2018