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Carriff Corporation key in new ASTM specification initiative The American Society for Testing & Materials (ASTM) recently published specification D 6707, a new standard specification for circular-knit geotextile used in subsurface drainage applications. Impetus for the new specification came from Carriff Corporation Inc., Midland, N.C. "The new specification is the result of three years’ of hard work by everyone on the ASTM Task Group." The ASTM Task Group that developed the specification included geotextile and pipe manufacturers, testers, and representatives from the State Department of Highways. The new ASTM specification (D 6707) offers consistency to design engineers and to specifiers, ensuring that the product specified will meet the standard. The test procedures and recommendations can be used to determine the acceptable performance properties of circular-knit geotextiles for acceptance testing. The specification relates to circular-knit geotextile used to wrap subsurface drainage pipes. Subsurface drainage pipes are wrapped with circular-knit geotextile to prevent them from filling with sand or sediment. The fabric is applied to the outside of the pipe, thus eliminating the need to wrap the entire trench. The stretchable, seamless geotextile has been successfully used in drainage applications for 25 years. Drain-Sleeve® is Carriff Corporation’s product offering for this application. For further technical information, please contact 1-800-845-5184. |
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