ASTM C1006/C1006M-19
(Test Method)Standard Test Method for Splitting Tensile Strength of Masonry Units
Standard Test Method for Splitting Tensile Strength of Masonry Units
SIGNIFICANCE AND USE
5.1 Masonry units alone and within assemblages commonly fail in a tensile mode when loaded in compression to failure. These tensile stresses result from differences in modulus of elasticity and Poisson's ratio between the masonry unit and mortar. Additionally, the dissimilarity in behavior of the grout within cores of masonry units under load leads to tensile stresses in the units and results in a splitting failure.
5.2 This test method produces a line load along the bed surface of the masonry unit. The compressive load applied to the unit, imposed by means of bearing rods, results in a tensile stress distributed over the height of the unit for the split length of the unit. This test method can be conducted with the rod oriented either in the longitudinal direction or in the transverse direction of the bed face. The splitting tensile strength is calculated by the equation given in 10.1.
5.3 The test value provides an indicator of masonry-unit splitting tensile strength. Additionally, the presence of defects such as visible voids or impurities in masonry units may be revealed.
5.4 The moisture content of the specimen will affect test results.
5.5 The height of the specimen will affect test results.
SCOPE
1.1 This test method covers the determination of the splitting tensile strength of masonry units.
1.2 Units—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 text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of 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.
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Designation: C1006/C1006M − 19
Standard Test Method for
1
Splitting Tensile Strength of Masonry Units
This standard is issued under the fixed designation C1006/C1006M; 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* 3.1 Definitions:
3.1.1 For definitions of terms used in this test method, refer
1.1 This test method covers the determination of the split-
to Terminology C1232.
ting tensile strength of masonry units.
3.2 Definitions of Terms Specific to This Standard:
1.2 Units—The values stated in either SI units or inch-
3.2.1 bearing rod, n—steel cylinder to concentrate the
pound units are to be regarded separately as standard. The
applied load along a single line.
values stated in each system may not be exact equivalents;
3.2.1.1 Discussion—The diameter of the bearing rod is
therefore,eachsystemshallbeusedindependentlyoftheother.
determined by the height of the specimen.
Combining values from the two systems may result in non-
3.2.2 compressible brace, n—tube or rod made of a non-
conformance with the standard.
rigid material.
1.3 The text of this standard references notes and footnotes
3.2.2.1 Discussion—Compressible braces are used to sup-
that provide explanatory material. These notes and footnotes
port the test assembly during the initial loading to prevent the
(excluding those in tables and figures) shall not be considered
rocking of the test assembly. The compressible braces are
as requirements of the standard.
requiredtobeslightlysmallerindiameterthanthebearingrods
1.4 This standard does not purport to address all of the
to prevent interference with the test results.
safety concerns, if any, associated with its use. It is the
3.2.3 gross split length, n—distance along the fracture from
responsibility of the user of this standard to establish appro-
one face of the specimen to the opposite face of the specimen.
priate safety, health, and environmental practices and deter-
3.2.4 net split length, n—gross split length minus the length
mine the applicability of regulatory limitations prior to use.
of any voids along the failure plane of the bearing rods.
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
3.2.5 test assembly, n—the combination of the specimen
ization established in the Decision on Principles for the
with a bearing rod adhered to the top and a bearing rod adhered
Development of International Standards, Guides and Recom-
to the bottom of the specimen.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
4. Summary of Test Method
4.1 A test assembly is made by adhering steel bearing rods
2. Referenced Documents
to the top and bottom faces of the specimen using capping
2
2.1 ASTM Standards:
compound. After the capping compound has cured, the test
C1232 Terminology for Masonry
assembly is placed in the test machine while supported by
C1552 Practice for Capping Concrete Masonry Units, Re-
compressible braces to prevent the test assembly from rocking.
lated Units and Masonry Prisms for Compression Testing
Aload is applied to the test assembly. The compressible braces
E4 Practices for Force Verification of Testing Machines
are removed once the test machine holds the test assembly
firmly. The load is continued to be applied until specimen
3. Terminology
failure.
5. Significance and Use
1
This test method is under the jurisdiction of ASTM Committee C15 on
Manufactured Masonry Units and is the direct responsibility of Subcommittee
5.1 Masonry units alone and within assemblages commonly
C15.04 on Research.
fail in a tensile mode when loaded in compression to failure.
Current edition approved June 15, 2019. Published July 2019. Originally
These tensile stresses result from differences in modulus of
approved in 1984. Last previous edition approved in 2013 as C1006 – 07(2013).
DOI: 10.1520/C1006_C1006M-19.
elasticity and Poisson’s ratio between the masonry unit and
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
mortar. Additionally, the dissimilarity in behavior of the grout
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
within cores of masonry units under load leads to tensile
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. stresses in the units and results in a splitting failure.
*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
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...
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: C1006 − 07 (Reapproved 2013) C1006/C1006M − 19
Standard Test Method for
1
Splitting Tensile Strength of Masonry Units
This standard is issued under the fixed designation C1006;C1006/C1006M; 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 This test method covers the determination of the splitting tensile strength of masonry units.
1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values given
in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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 text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of 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:
C1232 Terminology for Masonry
C1552 Practice for Capping Concrete Masonry Units, Related Units and Masonry Prisms for Compression Testing
E4 Practices for Force Verification of Testing Machines
3. Terminology
1
This test method is under the jurisdiction of ASTM Committee C15 on Manufactured Masonry Units and is the direct responsibility of Subcommittee C15.04 on Research.
Current edition approved June 1, 2013June 15, 2019. Published June 2013July 2019. Originally approved in 1984. Last previous edition approved in 20072013 as
C1006 – 07.C1006 – 07(2013). DOI: 10.1520/C1006-07R13.10.1520/C1006_C1006M-19.
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
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C1006/C1006M − 19
3.1 Definitions:
3.1.1 For definitions of terms used in this test method, refer to Terminology C1232.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 bearing rod, n—steel cylinder to concentrate the applied load along a single line.
3.2.1.1 Discussion—
The diameter of the bearing rod is determined by the height of the specimen.
3.2.2 compressible brace, n—tube or rod made of a non-rigid material.
3.2.2.1 Discussion—
Compressible braces are used to support the test assembly during the initial loading to prevent the rocking of the test assembly.
The compressible braces are required to be slightly smaller in diameter than the bearing rods to prevent interference with the test
results.
3.2.3 gross split length, n—distance along the fracture from one face of the specimen to the opposite face of the specimen.
3.2.4 net split length, n—gross split length minus the length of any voids along the failure plane of the bearing rods.
3.2.5 test assembly, n—the combination of the specimen with a bearing rod adhered to the top and a bearing rod adhered to the
bottom of the specimen.
4. Summary of Test Method
4.1 A test assembly is made by adhering steel bearing rods to the top and bottom faces of the specimen using capping
compound. After the capping compound has cured, the test assembly is placed in the test machine while supported by compressible
braces to prevent the test assembly from rocking. A load is applied to the test assembly. The compressible bra
...
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