ASTM E518-09
(Test Method)Standard Test Methods for Flexural Bond Strength of Masonry
Standard Test Methods for Flexural Bond Strength of Masonry
SIGNIFICANCE AND USE
These test methods are intended to provide simplified and economical means for gathering comparative research data on the flexural bond strength developed with different types of masonry units and mortar or for the purpose of checking job quality control (materials and workmanship).
Note 1—These test methods are not intended for use in establishing design stresses. For this purpose, Methods E 72 should be used.
SCOPE
1.1 These test methods cover determination of the flexural bond strength of unreinforced masonry assemblages. Two procedures are provided:
1.1.1 Test Method A—Simply supported beam with third-point loading.
1.1.2 Test Method B—Simply supported beam with uniform loading.
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.
1.3 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.
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Designation:E518–09
Standard Test Methods for
1
Flexural Bond Strength of Masonry
This standard is issued under the fixed designation E518; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 3. Significance and Use
1.1 These test methods cover determination of the flexural 3.1 These test methods are intended to provide simplified
bond strength of unreinforced masonry assemblages. Two and economical means for gathering comparative research data
procedures are provided: on the flexural bond strength developed with different types of
1.1.1 Test Method A—Simply supported beam with third- masonry units and mortar or for the purpose of checking job
point loading. quality control (materials and workmanship).
1.1.2 Test Method B—Simply supported beam with uniform
NOTE 1—These test methods are not intended for use in establishing
loading.
design stresses. For this purpose, Methods E72 should be used.
1.2 The values stated in SI units are to be regarded as the
standard. The inch-pound units given in parentheses are for 4. Apparatus
information only.
4.1 Testing Machine, conforming to the requirements of
1.3 This standard does not purport to address all of the
Practices E4.
safety concerns, if any, associated with its use. It is the
4.2 Test Method A—The third-point loading method is
responsibility of the user of this standard to establish appro-
illustrated in Fig. 1.The minimum span between supports shall
priate safety and health practices and determine the applica-
not be less than 2.5 multiplied by the average depth of the
bility of regulatory limitations prior to use.
specimen. The distance between each support and the adjacent
distributed point load shall be one-third of the span length 63
2. Referenced Documents
mm (0.1 in.). Steel rods with a maximum diameter of 25 mm
2
2.1 ASTM Standards:
(1in.)shallbeusedtosupportthespecimenandapplytheload.
C67 Test Methods for Sampling and Testing Brick and
The steel rods shall extend over the full width of the specimen.
Structural Clay Tile
NOTE 2—The loading apparatus is intended to be similar to that used in
C78 Test Method for Flexural Strength of Concrete (Using
Test Method C78 to reduce the need for redundant testing equipment.
Simple Beam with Third-Point Loading)
4.3 Test Method B—The uniform loading method is illus-
C140 Test Methods for Sampling and Testing Concrete
trated in Fig. 2. The minimum span between supports shall not
Masonry Units and Related Units
be less than 2.5 multiplied by the average depth of the
C270 Specification for Mortar for Unit Masonry
specimen. Uniformly distributed transverse load shall be ap-
C778 Specification for Standard Sand
plied by air pressure over the full surface of the specimen. The
E4 Practices for Force Verification of Testing Machines
air bag reaction frame shall fully contact one surface of the air
E72 Test Methods of Conducting Strength Tests of Panels
bag and shall be sufficiently stiff as to not measurably deflect
for Building Construction
during testing.
E575 Practice for Reporting Data from Structural Tests of
Building Constructions, Elements, Connections, and As-
NOTE 3—Air bags manufactured using 0.5 mm (0.02 in.) thick polyvi-
semblies
nyl chloride have been successfully used with this test. When testing
specimens constructed with a high bond-strength mortar, or whose
thickness is greater than a nominal 100 mm (4 in.), the applied load
1
These test methods are under the jurisdiction of ASTM Committee C15 on
required to fail the specimen may be such as to rupture the seams of the
Manufactured Masonry Units and are the direct responsibility of Subcommittee
air bag. In such cases Test Method A is recommended.
C15.04 on Research.
Current edition approved June 15, 2009. Published July 2009. Originally
5. Sampling and Testing
approved in 1974. Last previous edition approved in 2003 as E518 – 03. DOI:
10.1520/E0518-09.
5.1 Masonry Units—Representative masonry units shall be
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
sampledandtestedinaccordancewiththefollowingapplicable
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
methods: Test Methods C67 for brick, or Test Methods C140
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. for concrete masonry units. Minimum tests required shall be
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocke
...
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:E518–03 Designation: E 518 – 09
Standard Test Methods for
1
Flexural Bond Strength of Masonry
This standard is issued under the fixed designation E 518; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope*
1.1 Thesetestmethodscoverdeterminationoftheflexuralbondstrengthofunreinforcedmasonryassemblages.Twoprocedures
are provided:
1.1.1 Test Method A—Simply supported beam with third-point loading.
1.1.2 Test Method B—Simply supported beam with uniform loading.
1.2The values stated in SI units are to be regarded as the standard.
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for
information only.
1.3 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C67 Test Methods for Sampling and Testing Brick and Structural Clay Tile
C78 Test Method for Flexural Strength of Concrete (Using Simple Beam with Third-Point Loading)
C 140 Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
C 270 Specification for Mortar for Unit Masonry
C 778 Specification for Standard Sand
E4 Practices for Force Verification of Testing Machines
E72 Test Methods of Conducting Strength Tests of Panels for Building Construction
E 575 Practice for Reporting Data from Structural Tests of Building Constructions, Elements, Connections, and Assemblies
3. Significance and Use
3.1 These test methods are intended to provide simplified and economical means for gathering comparative research data on the
flexuralbondstrengthdevelopedwithdifferenttypesofmasonryunitsandmortarorforthepurposeofcheckingjobqualitycontrol
(materials and workmanship).
NOTE 1—These test methods are not intended for use in establishing design stresses. For this purpose, Methods E 72 should be used.
4. Apparatus
4.1 Testing Machine, conforming to the requirements of Practices E 4.
4.2 Test Method A—The third-point loading method is illustrated in Fig. 1. The load is applied by means of a loading apparatus
similar to that described in Test Method C78.
4.3.Theminimumspanbetweensupportsshallnotbelessthan2.5multipliedbytheaveragedepthofthespecimen.Thedistance
between each support and the adjacent distributed point load shall be one-third of the span length 63 mm (0.1 in.). Steel rods with
a maximum diameter of 25 mm (1 in.) shall be used to support the specimen and apply the load. The steel rods shall extend over
the full width of the specimen.
NOTE 2—The loading apparatus is intended to be similar to that used in Test Method C 78 to reduce the need for redundant testing equipment.
1
These test methods are under the jurisdiction of ASTM Committee C15 on Manufactured Masonry Units and are the direct responsibility of Subcommittee C15.04 on
Research.
Current edition approved June 10, 2003.15, 2009. Published September 2003.July 2009. Originally approved in 1974. Last previous edition approved in 20022003 as
E518–02.E 518 – 03.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM Standards
, Vol 04.05.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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E518–09
FIG. 1 The Third-Point Loading Method (Test Method A)
4.3 Test Method B—The uniform loading method is illustrated in Fig. 2. The load is applied by means of an air bag typically
made of poly(vinyl chloride) 0.5 mm (0.02 in.) thick. The air bag shall be of any convenient thickness and shall have a contact
area equal to that of the specimen. It shall be equipped with two valves for inflating and deflating the bag. The air bag shall be
backed by a steel channel suspended from the cross head of the testing machine with a suitable stud welde
...
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