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UV Resistence Silt Fence

A silt fence is a temporary barrier of woven geotextile fabric that is used to capture mainly coarse sediments carried in sheet flow (refer Figures 80 to 83). Silt fences temporarily impound sediment-laden runoff, slowing down the flow rate and allowing sediment to settle out of the water. Use......

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Mechanical Properties

Test method

Minimum Average (English)

Minimum Average (Metric)

Grab Tensile Strength (MD x CD)

ASTM D-4632

125 x 101 Ibs

556 x 449N

Grab Tensile Elongation

ASTM D-4632

15 x 15 %

15 x 15 %

Trapezoidal Tear

ASTM D-4533

40 x 40 Ibs

178 x 178 N

CBR Puncture

ASTM D-6241

250 Ibs

1112 N

Apparent Opening Size(AOS)

ASTM D-4751

30 US Std.Sieve

0.6 mm

Permittivity

ASTM D-4491

0.05 sec-1

0.05 sec-1

Water Flow Rate

ASTM D-4491

11 gal/min/ft²

448 L/min/m²

UV Resistance (% retained after 500 hours)

ASTM D-4355

80%

80%

A silt fence is a temporary barrier of woven geotextile fabric that is used to capture mainly coarse sediments carried in sheet flow (refer Figures 80 to 83). Silt fences temporarily impound sediment-laden runoff, slowing down the flow rate and allowing sediment to settle out of the water.

Use silt fences:

Where there is a need to control sediment by intercepting sheet flow

Where a site is low gradient, or is confined with a small contributing catchment, such as short batter fills and around watercourses

To delineate the limit of disturbance on an earthworks site, such as riparian areas or bush reserves

Where the installation of an earth or topsoil bund would destroy sensitive areas, such as bush and wetlands.

Do not install silt fences across watercourses or in areas of concentrated flows. Avoid trench excavations within the root zones of protected trees and trees that are to be retained.

Where there is a change in slope, no section of the fence should exceed a grade of 5% for a distance of more than 15 m.

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