Erosion Control Technology Council standard specifications for erosion control blankets and mulch control nets
Erosion Control Technology Council standard specifications for erosion control blankets and mulch control nets
Link to this table
| Type | Product Description | Material Composition | Slope Applications* | Channel Applications* | Minimum Tensile Strength 1 | |
|---|---|---|---|---|---|---|
| Maximum Gradient | C Factor 2, 5 | Permissible Shear Stresss 3, 4, 6 | ||||
| ULTRA SHORT-TERM - Typical 3 month functional longevity | ||||||
| 1.A | Mulch Control Nets | A photodegradable synthetic mesh or woven biodegradable natural fiber netting. | 5:1 (H:V) | < 0.10 @ 5:1 | = 0.25 lbs/ft2 (12 Pa) | 5 lbs/ft (0.073 kN/m) |
| 1.B | Netless Rolled Erosion Control Blankets | Natural and/or polymer fibers mechanically interlocked and/or chemically adhered together to form a RECP. | 4:1 (H:V) | < 0.10 @ 4:1 | = 0.5 lbs/ft2 (24 Pa) | 5 lbs/ft (0.073 kN/m) |
| 1.C | Single-net Erosion Control Blankets & Open Weave Textiles | Processed degradable natural and/or polymer fibers mechanically bound together by a single rapidly degrading, synthetic or natural fiber netting or an open weave textile of processed rapidly degrading natural or polymer yarns or twines woven into a continuous matrix. | 3:1 (H:V) | < 0.15 @ 3:1 | = 1.5 lbs/ft2 (72 Pa) | 50 lbs/ft (0.73 kN/m) |
| 1.D | Double-net Erosion Control Blankets | Processed degradable natural and/or polymer fibers mechanically bound together between two rapidly degrading, synthetic or natural fiber nettings. | 2:1 (H:V) | < 0.20 @ 2:1 | = 1.75 lbs/ft2 (84 Pa) | 75 lbs/ft (1.09 kN/m) |
| SHORT-TERM - Typical 12 month functional longevity | ||||||
| 2.A | Mulch Control Nets | A photodegradable synthetic mesh or woven biodegradable natural fiber netting. | 5:1 (H:V) | < 0.10 @ 5:1 | = 0.25 lbs/ft2 (12 Pa) | 5 lbs/ft (0.073 kN/m) |
| 2.B | Netless Rolled Erosion Control Blankets | Natural and/or polymer fibers mechanically interlocked and/or chemically adhered together to form a RECP. | 4:1 (H:V) | < 0.10 @ 4:1 | = 0.5 lbs/ft2 (24 Pa) | 5 lbs/ft (0.073 kN/m) |
| 2.C | Single-net Erosion Control Blankets & Open Weave Textiles | An erosion control blanket composed of processed degradable natural or polymer fibers mechanically bound together by a single degradable synthetic or natural fiber netting to form a continuous matrix or an open weave textile composed of processed degradable natural or polymer yarns or twines woven into a continuous matrix. | 3:1 (H:V) | < 0.15 @ 3:1 | = 1.5 lbs/ft2 (72 Pa) | 50 lbs/ft (0.73 kN/m) |
| 2.D | Double net Erosion Control Blankets | Processed degradable natural and/or polymer fibers mechanically bound together between two degradable, synthetic or natural fiber nettings. | 2:1 (H:V) | < 0.20 @ 2:1 | = 1.75 lbs/ft2 (84 Pa) | 75 lbs/ft (1.09 kN/m) |
| EXTENDED-TERM - Typical 24 month functional longevity | ||||||
| 3.A | Mulch Control Nets | A slow degrading synthetic mesh or woven natural fiber netting. | 5:1 (H:V) | < 0.10 @ 5:1 | = 0.25 lbs/ft2 (12 Pa) | 25 lbs/ft (0.36 kN/m) |
| 3.B | Erosion Control Blankets & Open Weave Textiles | An erosion control blanket composed of processed slow degrading natural or polymer fibers mechanically bound together between two slow degrading synthetic or natural fiber nettings to form a continuous matrix or an open weave textile composed of processed slow degrading natural or polymer yarns or twines woven into a continuous matrix. | 1.5:1 (H:V) | < 0.25 @ 1.5:1 | = 2.00 lbs/ft2 (96 Pa) | 100 lbs/ft (1.45 kN/m) |
| LONG-TERM - Typical 36 month functional longevity | ||||||
| 4 | Erosion Control Blankets & Open Weave Textiles | An erosion control blanket composed of processed slow degrading natural or polymer fibers mechanically bound together between two slow degrading synthetic or natural fiber nettings to form a continuous matrix or an open weave textile composed of processed slow degrading natural or polymer yarns or twines woven into a continuous matrix. | 1:1 (H:V) | < 0.25 @ 1:1 | = 2.25 lbs/ft2 (108 Pa) | 125 lbs/ft (1.82 kN/m) |
* C factor and shear stress for Types 1.A., 2.A. and 3.A mulch control nettings must be obtained with netting used in conjunction with pre-applied mulch material.
1 Minimum Average Roll Values when tested in the machine direction using ECTC Modified ASTM D 5035.
2 C Factor calculated as ratio of soil loss from RECP (rolled erosion control product) protected slope (tested at specified or greater gradient, h:v) to ratio of soil loss from unprotected (control) plot in large-scale testing. These performance test values should be *supported by periodic bench scale testing under similar test conditions using ECTC Test Method # 2.
3 Minimum shear stress RECP (unvegetated) can sustain without physical damage or excess erosion > 12.7 mm(0.5 in) soil loss] during a 30-minute flow event in large-scale testing. These performance test values should be *supported by periodic bench scale testing under similar test conditions and failure criteria using ECTC Test Method #3.
4 The permissible shear stress levels established for each performance category are based on historical experience with products characterized by Manning's roughness coefficients in the range of 0.01 - 0.05.
5 Acceptable large-scale test methods may include ASTM D6459 or other independent testing deemed acceptable by the engineer.
6Acceptable large-scale testing protocol may include ASTM D6460 or other independent testing deemed acceptable by the engineer.
This page was last edited on 22 December 2022, at 21:44.