ASTM D7508/D7508M-20

Standard Specification for Polyolefin Chopped Strands for Use in Concrete

ABSTRACT
This specification covers polyolefin chopped strands (fibers) for use in concrete. Tensile and tenacity properties are calculated by determining the breaking force, the breaking tenacity, and the elongation of adequately conditioned polyolefin filaments using Practice D1776. Conformance requirements for chopped strands for use in concrete include compliance with Specification C1116/C1116M, Type III as well as denier, finish content, tensile strength, and cut length.
SCOPE
1.1 This specification covers polyolefin chopped strands (fibers) for use in concrete.  
1.2 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.  
1.3 The following safety hazards caveat pertains only to the test methods described in this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Jan-2020
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: D13 - Textiles
• Drafting Committee: D13.58 - Yarns and Fibers

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:D7508/D7508M −20
Standard Specification for
1
Polyolefin Chopped Strands for Use in Concrete
This standard is issued under the fixed designation D7508/D7508M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D2257 Test Method for Extractable Matter in Textiles
D2258 Practice for Sampling Yarn for Testing
1.1 This specification covers polyolefin chopped strands
D3218 Specification for Polyolefin Monofilaments
(fibers) for use in concrete.
2.2 Other Documents:
1.2 The values stated in either SI units or inch-pound units
ICC ES AC32 Acceptance Criteria for Concrete with Syn-
3
are to be regarded separately as standard. The values stated in
thetic Fibers
each system may not be exact equivalents; therefore, each
3. Terminology
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
3.1 Definitions:
with the standard.
3.1.1 For definitions of terms used in this Specification,
refer to Terminology D123.
1.3 The following safety hazards caveat pertains only to the
test methods described in this specification: This standard does
3.2 Definitions of Terms Specific to This Standard:
not purport to address all of the safety concerns, if any,
3.2.1 chopped strand, n—cut staple polymer fiber of speci-
associated with its use. It is the responsibility of the user of this
fied lengths.
standard to establish appropriate safety and health practices
3.2.2 fiber, n—as used for concrete reinforcement, chopped
and determine the applicability of regulatory limitations prior
strand that is mixed into concrete or mortar.
to use.
3.2.2.1 Discussion—Fiber used for concrete or mortar rein-
1.4 This international standard was developed in accor-
forcement is available in various deniers. These include:
dance with internationally recognized principles on standard-
(a) Macro polyolefin fiber which has linear density greater
ization established in the Decision on Principles for the
than or equal to 580 denier (equivalent diameter ≥ 0.3 mm).
Development of International Standards, Guides and Recom-
(b) Micro polyolefin fiber which has a linear density of less
mendations issued by the World Trade Organization Technical
than 580 denier (equivalent diameter < 0.3 mm).
Barriers to Trade (TBT) Committee.
(c) Hybrid fiber which include a combination of macro
polyolefin and micro polyolefin fibers.
2. Referenced Documents
(d) Multi-length fibers which consist of chopped strands of
2
2.1 ASTM Standards:
various lengths of fiber.
C1116/C1116M Specification for Fiber-Reinforced Concrete
(e) Graded fiber which consists of a gradation of multiple
D123 Terminology Relating to Textiles
length and multiple denier fibers.
D1577 Test Methods for Linear Density of Textile Fibers
3.2.3 fiber reinforced concrete (FRC), n—hydraulic cement
D1776 Practice for Conditioning and Testing Textiles
concrete that includes chopped strands (fibers).
D1907 Test Method for Linear Density of Yarn (Yarn Num-
3.2.4 finish content, n—the percent by mass of finish extrac-
ber) by the Skein Method
tions on the fiber.
D2256 Test Method for Tensile Properties of Yarns by the
3.2.5 high-tenacity fiber, n—a manufactured fiber that be-
Single-Strand Method
longs to a generic class of fibers having exceptional breaking
strength; or having a breaking strength significantly greater
1 than the average strength of other (regular tenacity) fibers in
This specification is under the jurisdiction of ASTM Committee D13 on
Textiles and is the direct responsibility of Subcommittee D13.58 on Yarns and
the same generic class of equivalent linear densities.
Fibers.
3.2.6 polyolefin, n—any long-chain synthetic polymer com-
Current edition approved Feb. 1, 2020. Published February 2020. Originally
posed of at least 85 % by weight of ethylene, propylene, or
approved in 2010. Last previous edition approved in 2015 as D7508/
D7508M–10(2015). DOI: 10.1520/D7508_D7508M-20.
other olefin units (monomers), except amorphous (noncrystal-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
line) polyolefin.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
3
the ASTM website. Available from ICC Evaluation Services, http://www.icc-es.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 --
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7508/D7508M − 10 (Reapproved 2015) D7508/D7508M − 20
Standard Specification for
1
Polyolefin Chopped Strands for Use in Concrete
This standard is issued under the fixed designation D7508/D7508M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification covers polyolefin chopped strands (fibers) for use in concrete.
1.2 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.
1.3 The following safety hazards caveat pertains only to the test methods described in this specification: This standard does not
purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to
establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
C1116/C1116M Specification for Fiber-Reinforced Concrete
D123 Terminology Relating to Textiles
D1577 Test Methods for Linear Density of Textile Fibers
D1776 Practice for Conditioning and Testing Textiles
D1907 Test Method for Linear Density of Yarn (Yarn Number) by the Skein Method
D2256 Test Method for Tensile Properties of Yarns by the Single-Strand Method
D2257 Test Method for Extractable Matter in Textiles
D2258 Practice for Sampling Yarn for Testing
D3218 Specification for Polyolefin Monofilaments
2.2 Other Documents:
3
ICC ES AC32 Acceptance Criteria for Concrete with Synthetic Fibers
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this Specification, refer to Terminology D123.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 chopped strand, n—cut staple polymer fiber of specified lengths.
3.2.2 fiber, n—as used for concrete reinforcement, chopped strand that is mixed into concrete or mortar.
3.2.2.1 Discussion—
Fiber used for concrete or mortar reinforcement is available in various deniers. These include:
(a) Macro polyolefin fiber which has linear density greater than or equal to 580 denier (equivalent diameter ≥ 0.3 mm).
1
This specification is under the jurisdiction of ASTM Committee D13 on Textiles and is the direct responsibility of Subcommittee D13.58 on Yarns and Fibers.
Current edition approved July 1, 2015Feb. 1, 2020. Published September 2015February 2020. Originally approved in 2010. Last previous edition approved in 20102015
as D7508/D7508MD7508/D7508M–10(2015).—10. DOI: 10.1520/D7508_D7508M-10R15.10.1520/D7508_D7508M-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from ICC Evaluation Services, http://www.icc-es.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7508/D7508M − 20
(b) Micro polyolefin fiber which has a linear density of less than 580 denier (equivalent diameter < 0.3 mm).
(c) Hybrid fiber which include a combination of macro polyolefin and micro polyolefin fibers.
(d) Multi-length fibers which consist of chopped strands of various lengths of fiber.
(e) Graded fiber which consists of a gradation of multiple length and multiple denier fibers.
3.2.3 fiber reinforced concrete (FRC), n—hydraulic cement concrete that includes chopped strands (fibers).
3.2.4 finish content, n—the percent by mass of finish extractions on the fiber.
3.2.5 high-tenacity fiber, n—a manufactured fiber that belongs to a generic class of fibers having exceptional breaking strength;
or having a breaking strength significantly greater than the average strength of other (regular tenacity) fibe
...