ASTM A1061/A1061M-20
(Test Method)Standard Test Methods for Testing Multi-Wire Steel Prestressing Strand
Standard Test Methods for Testing Multi-Wire Steel Prestressing Strand
SIGNIFICANCE AND USE
4.1 The breaking strength and elongation of the strand are determined by one or more tensile tests in which fracture of the specimen ideally occurs in the free span.
4.2 Mechanical properties of the strand will be negatively affected if proper care is not taken to prevent damage such as severe bending, abrasion, or nicking of the strand during sampling.
4.3 Premature failure of the test specimens may result if there is appreciable notching, cutting, or bending of the specimen by the gripping devices of the testing machine.
4.4 Errors in testing will result if the wires constituting the strand are not loaded uniformly.
4.5 The mechanical properties of the strand will be materially affected by excessive heating during test specimen collection or preparation.
SCOPE
1.1 These test methods describe procedures for testing the mechanical properties of multi-wire steel prestressing strand.
1.2 These test methods are intended for use in evaluating specific strand properties prescribed in specifications for multi-wire steel prestressing strand, but they do not quantify acceptance criteria specified in the applicable specification for the strand being tested.
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. 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.
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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
Relations
Buy Standard
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:A1061/A1061M −20
Standard Test Methods for
1
Testing Multi-Wire Steel Prestressing Strand
This standard is issued under the fixed designation A1061/A1061M; 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* E177 Practice for Use of the Terms Precision and Bias in
ASTM Test Methods
1.1 These test methods describe procedures for testing the
E328 Test Methods for Stress Relaxation for Materials and
mechanical properties of multi-wire steel prestressing strand.
Structures
1.2 These test methods are intended for use in evaluating
E691 Practice for Conducting an Interlaboratory Study to
specific strand properties prescribed in specifications for multi-
Determine the Precision of a Test Method
wire steel prestressing strand, but they do not quantify accep-
tance criteria specified in the applicable specification for the
3. Terminology
strand being tested.
3.1 Definitions of Terms Specific to This Standard:
1.3 The values stated in either inch-pound units or SI units
3.1.1 breaking strength, n—maximum force at or after
are to be regarded separately as standard. Within the text, the
which one or more wires fracture.
SI units are shown in brackets. The values stated in each
3.1.2 free span, n—the distance between the gripping jaws
system may not be exact equivalents; therefore, each system
occupiedbythelengthofstrandtobetestedinwhichthestrand
shall be used independently of the other. Combining values
is not contacted or detrimentally influenced by the gripping
from the two systems may result in non-conformance with the
system.
standard.
3.1.3 lay length, n—the axial distance required to make one
1.4 This standard does not purport to address all of the
complete revolution of any wire of a strand.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.1.4 strand, n—a group of two, three or seven steel wires
priate safety, health, and environmental practices and deter-
woundtogetherinahelicalformwithuniformlaylengthofnot
mine the applicability of regulatory limitations prior to use.
less than 12 and not more than 16 times the nominal diameter
1.5 This international standard was developed in accor-
of the strand.
dance with internationally recognized principles on standard-
3.1.5 yield strength, n—measured force at 1.0 % extension
ization established in the Decision on Principles for the
under load (EUL).
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4. Significance and Use
Barriers to Trade (TBT) Committee.
4.1 The breaking strength and elongation of the strand are
2. Referenced Documents
determined by one or more tensile tests in which fracture of the
2
2.1 ASTM Standards:
specimen ideally occurs in the free span.
A370 Test Methods and Definitions for Mechanical Testing
4.2 Mechanical properties of the strand will be negatively
of Steel Products
affected if proper care is not taken to prevent damage such as
E4 Practices for Force Verification of Testing Machines
severe bending, abrasion, or nicking of the strand during
E83 Practice for Verification and Classification of Exten-
sampling.
someter Systems
4.3 Premature failure of the test specimens may result if
1
These test methods are under the jurisdiction of ASTM Committee A01 on
there is appreciable notching, cutting, or bending of the
Steel, Stainless Steel and Related Alloys and is the direct responsibility of
specimen by the gripping devices of the testing machine.
Subcommittee A01.05 on Steel Reinforcement.
Current edition approved May 1, 2020. Published May 2020. Originally
4.4 Errors in testing will result if the wires constituting the
approved in 2009. Last previous edition approved in 2016 as A1061/A1061M – 16.
strand are not loaded uniformly.
DOI: 10.1520/A1061_A1061M-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.5 The mechanical properties of the strand will be materi-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ally affected by excessive heating during test specimen collec-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. tion or preparation.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
A1061/A1061M−20
5. Apparatus sible to use chucking devices or post-tensioning anchorages as
a secondary grippin
...
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: A1061/A1061M − 16 A1061/A1061M − 20
Standard Test Methods for
1
Testing Multi-Wire Steel Prestressing Strand
This standard is issued under the fixed designation A1061/A1061M; 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 Scope*
1.1 These test methods describe procedures for testing the mechanical properties of multi-wire steel prestressing strand.
1.2 These test methods are intended for use in evaluating specific strand properties prescribed in specifications for multi-wire
steel prestressing strand, but they do not quantify acceptance criteria specified in the applicable specification for the strand being
tested.
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units
are shown in brackets. 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.
1.4 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 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:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
E4 Practices for Force Verification of Testing Machines
E83 Practice for Verification and Classification of Extensometer Systems
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E328 Test Methods for Stress Relaxation for Materials and Structures
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 breaking strength, n—maximum force at or after which one or more wires fracture.
3.1.2 free span, n—the distance between the gripping jaws occupied by the length of strand to be tested in which the strand is
not contacted or detrimentally influenced by the gripping system.
3.1.3 lay length, n—the axial distance required to make one complete revolution of any wire of a strand.
3.1.4 strand, n—a group of two, three or seven steel wires wound together in a helical form with uniform lay length of not less
than 12 and not more than 16 times the nominal diameter of the strand.
3.1.5 yield strength, n—measured force at 1.0 % extension under load (EUL).
4. Significance and Use
4.1 The breaking strength and elongation of the strand are determined by one or more tensile tests in which fracture of the
specimen ideally occurs in the free span.
1
These test methods are under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.05 on Steel Reinforcement.
Current edition approved March 1, 2016May 1, 2020. Published April 2016May 2020. Originally approved in 2009. Last previous edition approved in 20092016 as
A1061/A1061M – 09.16. DOI: 10.1520/A1061_A1061M-16.10.1520/A1061_A1061M-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
A1061/A1061M − 20
4.2 Mechanical properties of the strand will be negatively affected if proper care is not taken to prevent damage such as severe
bending, abrasion, or nicking of the strand during sampling.
4.3 Premature failure of the test specimens may result if there is appreciable notching, cutting, or bending of the specimen by
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.