Attachment_3_-_Material_Specifications.pdf

Chapter 3 National Standard Material Specifications

Part 642 National Engineering Handbook

592–1 (210–642–H, Amend.2, Sept. 2018) (

Material Specification 592—Geotextile

1. Scope This specification covers the quality of geotextile, including geotextile for temporary silt fence.

2. General Requirements Fiber (thread and yarn) used in the manufacture of geotextile must consist of synthetic polymer composed of a minimum of 85 percent by weight polypropylene, polyester, polyamide, polyethylene, polyolefin, or polyvinylchloride. The fiber must be formed into a stable network of filaments retaining dimensional stability relative to each other. The geotextile must be free of defects such as holes, tears, and abrasions.

The geotextile must be free of any chemical treatment or coating that significantly reduces its porosity.

Fibers must contain stabilizers, inhibitors, or both to enhance resistance to ultraviolet light. Geotextile, other than that used for temporary silt fence, must conform to the requirements in tables 592–1 or 592–2, as applicable. Geotextile used for temporary silt fence must conform to ASTM D6461.

Thread used for factory or field sewing must be of a color contrasting to the color of the fabric and made of high-strength polypropylene, polyester, or polyamide material. It must be as resistant to ultraviolet light as the geotextile being sewn.

3. Classification There are two geotextile classifications, woven and nonwoven. Geotextile for temporary silt fence may be either woven or nonwoven. Slit film woven geotextile may not be used except for temporary silt fence.

Woven geotextiles are made from fabric that is formed by the uniform and regular interweaving of the threads or yarns in two directions. Woven fabrics must be manufactured from monofilament yarn formed into a uniform pattern with distinct and measurable openings, retaining their position relative to each other. The fabric must have a selvedge edge or otherwise be finished to prevent unraveling.

Nonwoven geotextiles are made from fabric that is formed by a random placement of threads in a mat and bonded by needle punching, heat bonding, or resin bonding. Nonwoven geotextile must have distinct but variable small openings, retaining their position relative to each other when bonded. The use of heat- or resin-bonded nonwovens is restricted as specified in note 2 of table 592-2.

4. Sampling and Testing The geotextile must conform to tables 592–1, 592–2, or ASTM D6461 as applicable for the product type shown on the label. Documentation described in either a. or b. below is required to verify the product meets the specified requirements:

a. Product properties as listed in the latest edition of the "Specifiers Guide," Geosynthetics (Industrial Fabrics Association International, 1801 County Road B, West Roseville, MN 55113-4061 or at http://www.geosindex.com), and that represent average roll values, are acceptable.

b. Test data from the geotextile production run for each of the specified tests listed in tables 592–1, 592– 2, or ASTM D6461, as applicable.

5. Shipping and Storage Each roll of geotextile must be labeled or tagged to clearly identify the brand, class, and the individual production run in accordance with ASTM D4873. The geotextile must be shipped and transported in rolls wrapped with a cover for protection from moisture, dust, dirt, debris, and ultraviolet light. The cover must be maintained undisturbed to the maximum extent possible before placement.

Solicitation 12FPC119Q0034 Attachment 3

Part 642 National Engineering Handbook

(210–642–H, Amend.2, Sept. 2018)

Material Specification 592 Geotextile (continued)

Table 592–1 Requirements for woven geotextiles 1/

Property Test method Class I Class II Class III Class IV

Grab tensile strength (lb)

ASTM D4632 247 minimum 180 minimum 180 minimum 315

Elongation at failure

ASTM D4632 <50 <50 <50 <50

Trapezoidal tear strength (lb)

Puncture strength (lb)

Ultraviolet stability (% retained strength)

Permittivity (sec–1) ASTM D4491 as specified

Apparent opening size (AOS) 2/

ASTM D4751 as specified

Percent open area

(POA) (%)

USACE

3/CWO-02215-86

as specified

1/ All values are minimum average roll values (MARV) in the weakest principal direction, unless otherwise noted.

2/ Maximum average roll value.

3/ Note: CWO is a USACE reference.

ASTM D4533 90 minimum 67 minimum 67 minimum 112 minimum

ASTM D6241 495 minimum 371 minimum 371 minimum 618 minimum

ASTM D4355 50 minimum 50 minimum 50 minimum 70 minimum

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(210–642–H, Amend.2, Sept. 2018) (

Material Specification 592 Geotextile (continued)

Table 592–2 Requirements for nonwoven geotextiles 1/

Property Test method Class I 2/ Class II 2/ Class III 2/ Class IV 2/

Grab tensile strength (lb)

ASTM D4632

grab test

202 minimum 157 minimum 112 minimum 202 minimum

Elongation at failure (%)

ASTM D4632 50 minimum 50 minimum 50 minimum 50 minimum

Trapezoidal tear strength (lb)

ASTM D4533 79 minimum 56 minimum 40 minimum 79 minimum

Puncture strength (lb) ASTM D6241 433 minimum 309 minimum 223 minimum 433 minimum

Ultraviolet light ASTM D4355 50 minimum 50 minimum 50 minimum 50 minimum (retained strength) (%)

Permittivity sec–1 ASTM D4491 0.70 minimum or as specified

Apparent opening size (AOS) (mm) 3/

ASTM D4751 0.22 maximum or as specified

1/ All values are minimum average roll values (MARV) in the weakest principal direction, unless otherwise noted.

2/ Needle punched geotextiles may be used for all classes. Heat-bonded or resin-bonded geotextiles may be used for class IV only.

3/ Maximum average roll value.

523–1

(210–642–H, Amend.2, Sept. 2018)

Part 642

Material Specification 523—Rock for Riprap

1. Scope This specification covers the quality of rock to be used in the construction of rock riprap.

2. Quality Individual rock fragments must be dense, sound, and free from cracks, seams, and other defects conducive to accelerated weathering. Except as otherwise specified, the rock fragments must be angular to subrounded. The least dimension of an individual rock fragment must not be less than one-third the greatest dimension of the fragment. ASTM D4992 provides guidance on selecting rock.

Except as otherwise provided, the rock must be tested and must have the following properties:

Rock type 1

• Bulk specific gravity (saturated surface-dry basis)—Not less than 2.5 when tested in accordance with ASTM D6473 on samples prepared as described for soundness testing.

• Absorption—Not more than 2 percent when tested in accordance with ASTM D6473 on samples prepared as described for soundness testing.

• Soundness—The weight loss in five cycles must not be more than 10 percent when sodium sulfate is used or more than 15 percent when magnesium sulfate is used.

Rock type 2

• Bulk specific gravity (saturated surface-dry basis)—Not less than 2.5 when tested in accordance with ASTM D6473 on samples prepared as described for soundness testing.

• Absorption—Not more than 2 percent when tested in accordance with ASTM D6473 on samples prepared as described for soundness testing.

• Soundness—The weight loss in five cycles must be not more than 20 percent when sodium sulfate is used or more than 25 percent when magnesium sulfate is used.

Rock type 3

• Bulk specific gravity (saturated surface-dry basis)—Not less than 2.3 when tested in accordance with ASTM D6473 on samples prepared as described for soundness testing.

• Absorption—Not more than 4 percent when tested in accordance with ASTM D6473 on samples prepared as described for soundness testing.

• Soundness—The weight loss in five cycles must be not more than 20 percent when sodium sulfate is used or more than 25 percent when magnesium sulfate is used.

3. Methods of soundness testing Rock cube soundness—The sodium or magnesium sulfate soundness test for all rock types (1, 2, or 3) must be performed on a test sample of 5,000 ± 300 grams of rock fragments, reasonably uniform in size and cubical in shape, and weighing, after sampling, about 100 grams each. They must be obtained from rock samples that are representative of the total rock mass, as noted in ASTM D4992, and that have been sawed into slabs as described in ASTM D5121.

The samples must further be reduced in size by sawing the slabs into cubical blocks. The thickness of the slabs and the size of the sawed fragments must be determined by the size of the available test apparatus and as necessary to provide, after sawing, the approximate 100-gram samples. The cubes must undergo five cycles of soundness testing in accordance with ASTM C88.

Part 642

523–2

Material Specification 523 Rock for Riprap (continued)

(210–642–H, Amend. 2, Sept. 2018)

Internal defects may cause some of the cubes to break during the sawing process or during the initial soaking period. Do not test any of the cubes that break during this preparatory process.

Such breakage, including an approximation of the percentage of cubes that break, must be noted in the test report.

After the sample has been dried following completion of the final test cycle and washed to remove the sodium sulfate or magnesium sulfate, the loss of weight must be determined by subtracting from the original weight of the sample the final weight of all fragments that have not broken into three or more fragments.

The test report must show the percentage loss of the weight and the results of the qualitative examination.

Rock slab soundness—When specified, the rock must also be tested in accordance with ASTM

D5240. Deterioration of more than 25 percent of the number of blocks is cause for rejection of rock from this source. Rock must also meet the requirements for average percent weight loss stated below.

• For projects located north of the Number 20 Freeze-Thaw Severity Index Isoline (fig.

523–1), unless otherwise specified, the average percent weight loss for Rock Type 1 must not exceed 20 percent when sodium sulfate is used or 25 percent when magnesium sulfate is used. For Rock Types 2 and 3, the average percent weight loss must not exceed

25 percent for sodium sulfate soundness or 30 percent for magnesium sulfate soundness.

• For projects located south of the Number 20 Freeze-Thaw Severity Index Isoline, unless otherwise specified, the average percent weight loss for Rock Type 1 must not exceed 30 percent when sodium sulfate is used or 38 percent when magnesium sulfate is used. For

Rock Types 2 and 3, the average percent weight loss must not exceed 38 percent for sodium sulfate soundness or 45 percent for magnesium sulfate soundness.

Part 642

523–3

Material Specification 523 Rock for Riprap (continued)

(210–642–H, Amend. 2, Sept. 2018)

Figure 523–1 Number 20 Freeze-Thaw Severity Index Isoline (map approximates the map in ASTM D5312)

4. Field durability inspection

Rock that fails to meet the material requirements stated above (if specified), may be accepted only if similar rock from the same source has been demonstrated to be sound after 5 years or more of service under conditions of weather, wetting and drying, and erosive forces similar to those anticipated for the rock to be installed under this specification.

A rock source may be rejected if the rock from that source deteriorates in less than 5 years under similar use and exposure conditions expected for the rock to be installed under this specification, even though it meets the testing requirements stated above.

Deterioration is defined as the loss of more than one-quarter of the original rock volume, or severe cracking that would cause a block to split. Measurements of deterioration are taken from linear or surface area particle counts to determine the percentage of deteriorated blocks. Deterioration of more than 25 percent of the pieces is cause for rejection of rock from the source.

5. Grading The rock must conform to the specified grading limits after it has been placed within the matrix of the rock riprap. Grading tests must be performed, as necessary, according to ASTM D5519, Method

A, B, or C, as applicable.