ASTM A1096/A1096M-15
(Test Method)Standard Test Method for Evaluating Bond of Individual Steel Wire, Indented or Plain, for Concrete Reinforcement
Standard Test Method for Evaluating Bond of Individual Steel Wire, Indented or Plain, for Concrete Reinforcement
SIGNIFICANCE AND USE
5.1 Steel wire for concrete reinforcement is used in various applications wherein the wire is expected to transfer passive or prestressing forces to the structural member via the bond of the exposed wire surfaces to the surrounding concrete.
5.2 Wire manufacturing processes, subsequent handling, and storage conditions can influence the wire bond.
5.3 Steel wire for concrete reinforcement is used in construction applications with a variety of concrete mixtures. Developing test methods and threshold values for the performance of the wire in each of these unique mixtures is impractical.
SCOPE
1.1 This test method describes procedures for evaluating bond of individual steel wire, indented or plain, for concrete reinforcement. The bond determined by this test method is stated as the tensile force needed to pull the wire through the cured mortar in a cylindrical steel casing.
1.2 The result of the test is the maximum tensile force measured on the loaded end of the wire recorded at a free-end slip less than or equal to 0.10 in. [2.5 mm].
1.3 Units—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 and health practices and determine the applicability of regulatory limitations prior to use.
General Information
Standards Content (Sample)
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Designation: A1096/A1096M − 15
Standard Test Method for
Evaluating Bond of Individual Steel Wire, Indented or Plain,
1
for Concrete Reinforcement
This standard is issued under the fixed designation A1096/A1096M; 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 A881/A881MSpecification for Steel Wire, Indented, Low-
Relaxation for Prestressed Concrete
1.1 This test method describes procedures for evaluating
C109/C109MTest Method for Compressive Strength of
bond of individual steel wire, indented or plain, for concrete
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
reinforcement. The bond determined by this test method is
Specimens)
stated as the tensile force needed to pull the wire through the
C150/C150MSpecification for Portland Cement
cured mortar in a cylindrical steel casing.
C192/C192MPractice for Making and Curing ConcreteTest
1.2 The result of the test is the maximum tensile force
Specimens in the Laboratory
measured on the loaded end of the wire recorded at a free-end
C511Specification for Mixing Rooms, Moist Cabinets,
slip less than or equal to 0.10 in. [2.5 mm].
Moist Rooms, and Water Storage Tanks Used in the
1.3 Units—The values stated in either inch-pound units or Testing of Hydraulic Cements and Concretes
C778Specification for Standard Sand
SI units are to be regarded separately as standard. Within the
text, the SI units are shown in brackets. The values stated in
3. Terminology
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
3.1 Definitions:
values from the two systems may result in non-conformance
3.1.1 bond, n—longitudinal components of adhesion,
with the standard.
friction, and mechanical interlock between wire and mortar or
concrete.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.1.2 bond breaker, n—product wrapped around wire to
responsibility of the user of this standard to establish appro-
prevent wire-to-mortar bond over a certain length.
priate safety, health, and environmental practices and deter-
3.1.2.1 Discussion—Duct tape is commonly used for this
mine the applicability of regulatory limitations prior to use.
purpose.
1.5 This international standard was developed in accor-
3.1.3 mortar, n—mixture of cement, fine aggregate, and
dance with internationally recognized principles on standard-
water.
ization established in the Decision on Principles for the
3.1.4 test specimen, n—assembly consisting of one steel
Development of International Standards, Guides and Recom-
casing, one sample of wire, and mortar.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
4. Summary of Test Method
4.1 Six samples of 0.2 – 0.3 in. [5 – 8 mm] diameter (see
2. Referenced Documents
2 Note 1) steel wire are selected from a single continuous length
2.1 ASTM Standards:
for testing. Each wire sample is cast into a steel casing with a
A421/A421MSpecification for Stress-Relieved Steel Wire
bonded length of 6 in. [150 mm].
for Prestressed Concrete
4.2 Amortarmixture,includingthefineaggregatesource,is
prescribed, but the cement source is not.
1
This test method is under the jurisdiction of ASTM Committee A01 on Steel,
4.3 Testing of the six specimens begins shortly after the
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
mortar-cubecompressivestrengthreaches4500psi[31.0MPa]
A01.05 on Steel Reinforcement.
and ends before the strength reaches 5000 psi [34.5 MPa]. A
Current edition approved Dec. 1, 2015. Published January 2016. DOI: 10.1520/
A1096_A1096M-15.
specified, force-controlled loading rate is applied at the bottom
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
of the wire while the applied load and free-end slip at the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
opposite (top) end is continuously monitored and recorded.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. The maximum pullout force occurring at an end slip less than
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A1096/A1096M − 15
or equal to 0.10 in. [2.5 mm] is recorded as the “test result.” 8.1.5 Aggregates—No aggregates other than sand as speci-
One complete test is comprised of the average of these six fied in 8.1.1 shall be used.
specimens.
8.2 Mixing Procedure—The mixing proce
...
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