1.1 This specification covers requirements and test methods for geotextile fabrics and associated components used in temporary silt fence applications. Table 1 is a material purchasing specification based on AASHTO M288. Table 2 is a specification to be used in areas of high water flow.
1.2 Both specifications are applicable to the use of a geotextile as a vertical permeable interceptor designed to remove suspended soil from overland, nonconcentrated water flow. The function of a temporary silt fence is to trap and allow settlement of soil particles from sediment laden water. The purpose is to greatly limit the transport of eroded soil from construction sites and other areas affected by water runoff. NOTE 1—It should be noted that proper installation and maintenance are critical for the effective functioning of silt fence.
1.3 The tests used to characterize the silt fence are intended to ensure good workmanship and quality and are not necessarily adequate for design purposes in view of the wide variety of possible sediments and performance objectives.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents, therefore each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. NOTE 2—Although the Table 1 specification should be acceptable in most erosion control applications, it should be noted that an alternative silt fence specification for a higher water flow rate, listed in Table 2, may be required by the engineers in areas that are susceptible to higher water runoff; using Table 2 specification will minimize safety hazards such as hydroplaning in these areas.
ASTM D6461/D6461M-16a Referenced Document
ASTM D123 Standard Terminology Relating to Textiles*, 2023-09-14 Update
ASTM D276 Standard Test Methods for Identification of Fibers in Textiles*, 2024-04-21 Update
ASTM D4354 Standard Practice for Sampling of Geosynthetics for Testing
ASTM D4355 Standard Test Method for Deterioration of Geotextiles from Exposure to Ultraviolet Light and Water (Xenon-Arc Type Apparatus)
ASTM D4439 Standard Terminology for Geosynthetics*, 2024-02-01 Update
ASTM D4491 Standard Test Methods for Water Permeability of Geotextiles by Permittivity
ASTM D4632 Standard Test Method for Grab Breaking Load and Elongation of Geotextiles
ASTM D4751 Standard Test Method for Determining Apparent Opening Size of a Geotextile
ASTM D4759 Standard Practice for Determining the Specification Conformance of Geosynthetics
ASTM D4873 Standard Guide for Identification, Storage, and Handling of Geosynthetic Rolls and Samples
ASTM D653 Standard Terminology Relating to Soil, Rock, and Contained Fluids
ASTM D6637 Standard Test Method for Determining Tensile Properties of Geogrids by the Single or Multi-Rib Tensile Method*, 2024-04-21 Update