Product Features and Applications
The Features of E'GRID Geogrids:
E’GRID Geogrids are manufactured by stretching high quality punched sheets of engineering grades of polymers under closely controlled conditions. The structures of optimised nodes ribs and bars that this produces has a significant effect on the spreading of loads in soils. Generally a polymer has molecular chains distributed randomly with similar properties in all directions. The principle of manufacturing punched and stretched geogrids relies upon greatly improved mechanical properties in the direction of orientation. The orientation improves polymer strength. The control of orientation in the nodes has a significant effect on the tensile properties and creep performance of the grid. This feature has been optimised in E’GRID Geogrids. Orientation gives a stable arrangement of the polymer molecular chains resulting in improved tensile modulus. Orientation also greatly reduces strain under long-term constant loading, essential dimensional stability in construction work.
Carbon Black Content and Dispersion
The good UV resistance property of E'GRID geogrids is provided by the optimum content of finely divided, weathering grade carbon black. Regular testing according to international standards of carbon black content and dispersion ensures the consistency of UV resistance of E'GRID Geogrids. As a result, these products are predicted to have useful lives of 100 years or more in all climates
A good creep performance under sustained loading is essential for the successful use of geogrids in critical structures such as walls abutments and steep embankments. BOSTD Geosynthetics Qingdao Ltd. is one of the few geotechnical product manufacturers in the world with the necessary creep testing facilities in-house to ensure that its products meet the stringent requirements of international standards and that make this data available to design engineers. Results from tests carried out in the company’s suite of temperature controlled laboratories are used to safely predict the product performance for design lifetimes of 120 years or more. By testing at ambient and elevated temperatures the creep behaviour is accelerated.
Applications of E'GRID Geogrids and Associated Products
The following documents describe the use of E'GRID Geogrids and associated products in a range of applications. The wide range of solutions illustrated is not exhaustive. If the solution you require is not shown, please contact your local distributor or NewGrids to discuss your project needs.
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