Part 1 — General
1.1 Section Includes
A.Hydraulic Erosion Control Products (HECP) used to reduce soil erosion on disturbed areas of a construction project.
1.2 RELATED SECTIONS Not Used
1.3 References
A.ASTM D 2974: Determining the Water (Moisture) Content, Ash Content, and Organic Material of Peat and Other Organic Soils
B.ASTM D 6566: Measuring Mass per Unit Area of Turf Reinforcement Mats
C.ASTM D 6567: Measuring the Light Penetration of an Erosion Control Product (ECP)
D.ASTM D 7322: Determination of Erosion Control Product (ECP) Ability to Encourage Seed Germination and Plant Growth Under Bench-Scale Conditions
E.ASTM D 7367: Determining Water Holding Capacity of Fiber Mulches for Hydraulic Planting
F.ASTM D 8297: Determination of Erosion Control Products (ECP) Performance in Protecting Slopes from Sequential Rainfall-Induced Erosion Using a Tilted Bed Slope
G.ASTM D 8298: Determination of Erosion Control Products (ECP) Performance in Protecting Slopes from Continuous Rainfall-Induced Erosion Using a Tilted Bed Slope
1.4 Definitions
A.Hydraulic Erosion Control Products (HECP) – Products that are mixed with water and hydraulically applied as a slurry to reduce soil erosion and aid in vegetation establishment.
1.5 Submittals
A.Authorized Products List (APL) Compliance Form for information.
B.Manufacturer installation instructions and Material Safety Data Sheet for information.
C.HECP work plan for review, include the following:
1.Description of the measuring technique.
2.Calculated area to receive each Type of HECP
3.Product name, application rate and total quantity of each Type of HECP to be used.
4.Product name, application rate and total quantity of Tackifier for HECP Type 1, if required
1.6 Delivery, Storage, and Handling
A.Deliver material and products in original ultraviolet (UV) and weather- resistant factory labeled packages showing the name of the manufacturer and product description.
Part 2 — Products
2.1 Hydraulic Erosion Control Products (Hecp)
A.Furnish HECP according to Table 1 with components such as biodegradable wood, wheat, straw or other natural fibrous material that are manufactured through thermal or mechanical process and generally pre-packaged with tackifiers, flocculants, polymers, co-polymers or other binding agents.
B.Use HECP components pre-packed by the manufacturer, with the following exception:
1.HECP Type 1 products that do not contain a pre-mixed tackifier require a tackifier to be field mixed into the HECP. Table 1 Requirements for Hydraulic Erosion Control Products HECP HECP HECP Physical Properties Test Method Type 1 Type 2 Type 3 Minimum Organic Matter ASTM D 2974 90% 80% 80% Minimum Mass per Unit Area ASTM D 6566 8 oz/yd2 11 oz/yd2 11.5 oz/yd2 Minimum Ground Cover ASTM D 6567 90% 95% 98% Minimum Water Holding ASTM D 7367 400% 600% 1000% Capacity Colored/Dyed Observed1 Yes Performance Properties Minimum Functional Longevity Observed1 3 months 6 months 12 months ASTM D 82972 Maximum C Factor or 0.40 0.05 0.01 ASTM D 82982 Vegetation Establishment ASTM D 73223 PASS PASS PASS Estimated or determined by Manufacturer documentation. C Factor testing must match the Type 1 Rainfall Intensity, Slope, and Duration Combinations shown in Table 4 in ASTM D 8297 or ASTM D 8298. Current ASTM D 7322 test results are graded as PASS or FAIL. PASS score indicates that seed germination is > 100% when compared to a control/bare soil sample. FAIL score indicates that seed germination is ≤ 100%.
2.2 Water
A.Free of dirt, silt and other detrimental matter.
2.3 Tackifier for Hecp Type 1
A.General
1.Nonflammable
2.Nontoxic to aquatic organisms.
3.Functional for a minimum of 90 days.
B.Guar-based tackifier
1.Derived from ground endosperm of guar seeds (Cyamopsis tetragonolobus) and treated with dispersant agents.
2.Use a rate of 50 lb per acre when required for HECP Type 1 products without tackifier.
C.Psyllium-based tackifier
1.Manufactured from the finely ground muciloid coating of Plantago ovata or Plantago ispaghula seeds.
2.Will hydrate when mixed with water to form a slurry and produce a firm, resilient and rewettable membrane on the soil surface after application.
3.Use a rate of 100 lb per acre when required for HECP Type 1 products without tackifier.
D.Starch-based tackifier
1.Typically derived from corn or potatoes in a non-ionic, cold-water soluble (pre-gelatinized) granular form.
2.Use a rate of 150 lb per acre when required for HECP Type 1 products without tackifier.
Part 3 — Execution
3.1 Preparation
A.Complete required grading and topsoil placement in designated areas before applying HECP.
B.Measure the area to be stabilized with HECP to calculate the quantity of HECP required.
1.Coordinate with the Engineer to determine acceptability of the measuring technique to be used before measuring the areas to be stabilized.
C.Time restrictions of HECP application:
1.Apply HECP within 24 hours after seeding.
2.Apply when soil is dry and rain is not forecasted to occur within 24- 48 hours after HECP application.
3.2 Pre-Application Verification Test
A.Apply HECP to 100 yd2 test area in the presence of the Engineer before beginning HECP application.
1.Begin HECP application after obtaining the Engineer’s concurrence.
3.3 Hecp Application
A.Mix water and HECP according to the manufacturer’s instructions.
B.Apply HECP according to Table 2, unless manufacturer’s recommended rate is higher than the rate specified. Table 2 HECP Application (Slope Gradient and Application Rates) Minimum Rate HECP Max. Slope Gradient (H:V) (lb per acre) Type 1 3:1 2,500 Type 2 2:1 3,500 Type 3 1:1 4,000
C.Apply a uniform layer of HECP slurry from a minimum of two opposing directions to meet manufacturer’s instructions for installed thickness and ground coverage.
1.Use hoses and extensions to apply HECP as required to difficult to reach locations.
2.Verification test area may be used to visually verify quality of HECP application.
3.Remove overspray before the HECP slurry dries.
Hydraulic Erosion Control Products in other states
Get an email when 02911 changes
Utah revises spec sections through supplementals and new editions. We check this one every week and email you the day it changes. Free, no account.
Source: Utah Standard Specifications for Road and Bridge Construction, 2027 Edition. Pages 850–854 of 1,343. View official source ↗