Geotextile Specifications for Highways Applications
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1989-07-01
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Abstract:This document has been developed after review of 46 of the 52 (50 States, District of Columbia and Puerto Rico) State Agencies who responded to our request for their most recent specifications on geotextiles and related geosynthetic materials. The original requests were sent March 16, 1987, with follow up requests in April of 1988. From the excellent and cooperative response we feel that a representative sample has indeed been realized. After an introduction, the report focuses on required property values, general details, individual State specification comparisons and conclusions. This main body of the report is purposely made quite brief. The report continues with a sample generic geotextile specification. It is quite detailed and includes all features which we feel necessary for proper use of geotextiles in highway applications. The sample specification does not recommend numeric product values in the "property requirements" section. This is purposely left to the individual State agency, or other specifying group, since numeric values are both geographic dependent and site specific. Such values also reflect the philosophy of the specifying agency; ranging from extreme conservatism in required properties to extreme concern over costs.
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