ASTM C952-02(2009)
(Test Method)Standard Test Method for Bond Strength of Mortar to Masonry Units
Standard Test Method for Bond Strength of Mortar to Masonry Units
SIGNIFICANCE AND USE
These procedures are useful for research into bond strength of masonry. They are not intended to predict the bond strength of commercial masonry construction. The bond strength in commercially built structures is determined by many factors beyond the characteristics of mortar, masonry units, and the procedures of this test method.
Note 1—The crossed-brick couplets method measures a direct tensile strength of the bond between the mortar and masonry unit. It does not determine the flexural strength of the unit mortar assembly. Other test methods may be more appropriate for determining the flexural bond strength between mortar and masonry units. These include Test Method C 1072, Test Methods C 1357, and Test Methods E 518.
SCOPE
1.1 This test method provides two procedures for measuring bond strength of mortar to masonry units: a crossed brick couplet tensile test for evaluating mortar-brick bond strength and a stacked-bond, flexural test for evaluating mortar-concrete block bond strength.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address 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: C952 − 02 (Reapproved 2009)
Standard Test Method for
1
Bond Strength of Mortar to Masonry Units
This standard is issued under the fixed designation C952; 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 C1357 Test Methods for Evaluating Masonry Bond Strength
C1437 Test Method for Flow of Hydraulic Cement Mortar
1.1 This test method provides two procedures for measuring
E518 Test Methods for Flexural Bond Strength of Masonry
bond strength of mortar to masonry units: a crossed brick
couplet tensile test for evaluating mortar-brick bond strength
3. Significance and Use
andastacked-bond,flexuraltestforevaluatingmortar-concrete
3.1 These procedures are useful for research into bond
block bond strength.
strength of masonry. They are not intended to predict the bond
1.2 The values stated in inch-pound units are to be regarded
strength of commercial masonry construction. The bond
as standard. The values given in parentheses are mathematical
strength in commercially built structures is determined by
conversions to SI units that are provided for information only
many factors beyond the characteristics of mortar, masonry
and are not considered standard.
units, and the procedures of this test method.
1.3 This standard does not purport to address the safety
NOTE 1—The crossed-brick couplets method measures a direct tensile
concerns, if any, associated with its use. It is the responsibility
strength of the bond between the mortar and masonry unit. It does not
of the user of this standard to establish appropriate safety and
determine the flexural strength of the unit mortar assembly. Other test
health practices and determine the applicability of regulatory
methods may be more appropriate for determining the flexural bond
limitations prior to use. strength between mortar and masonry units. These include Test Method
C1072, Test Methods C1357, and Test Methods E518.
2. Referenced Documents
PREPARATION AND TESTING OF FRESH MORTAR
2
2.1 ASTM Standards:
C67 Test Methods for Sampling and Testing Brick and
4. Preparation of Mortar
Structural Clay Tile
4.1 Proportion mortar materials by weights equivalent to
C90 Specification for Loadbearing Concrete Masonry Units
volume proportions to be used in prism construction. Use unit
C129 Specification for Nonloadbearing Concrete Masonry
weights for individual materials as given in Specification
Units
C270. Sand shall be permitted to be used in a damp loose
C140 Test Methods for Sampling and Testing Concrete
condition,providedthatmoisturecontentofsandisdetermined
Masonry Units and Related Units
with reference to the oven-dried condition and batch propor-
C270 Specification for Mortar for Unit Masonry
tions are adjusted accordingly. Record weight of ingredients
C780 Test Method for Preconstruction and Construction
(including water) added to the batch of mortar.
Evaluation of Mortars for Plain and Reinforced Unit
4.2 Mix mortar in a mechanical paddle-type mortar mixer.
Masonry
Time periods referenced below are measured from when water
C1072 Test Methods for Measurement of Masonry Flexural
and cementitious materials are combined.
Bond Strength
4.2.1 Add an estimated amount of water to the mortar to
achieve the desired consistency (Note 2). Mix mortar for three
1 minutes and determine consistency. If the desired consistency
This test method is under the jurisdiction of ASTM Committee C15 on
Manufactured Masonry Units and is the direct responsibility of Subcommittee
is specified by flow determine it in accordance with Test
C15.04 on Research. Committee E-6 maintains a continued interest in these
Method C1437. If the desired consistency is specified as initial
practices and will make use of them in the future.
cone penetration, determine it in accordance with Test Method
CurrenteditionapprovedJune1,2009.PublishedJuly2009.Originallyapproved
´1
C780.Onceconsistencyisrecorded,returnthematerialusedto
in 1959. Last previous edition approved in 2002 as C952 – 02 . DOI: 10.1520/
C0952-02R09.
measure the consistency to the mixer. If the consistency is
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
within the desired range, continue mixing the batch for an
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
additional two minutes. If the consistency is less than the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. desired range, add water to the batch and mix for one minute
*A Summary of Changes secti
...
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.
´1
Designation:C952–91 (Reapproved 1997) Designation:C952–02 (Reapproved 2009)
Standard Test Method for
1
Bond Strength of Mortar to Masonry Units
This standard is issued under the fixed designation C 952; 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
´ NOTE—Section 13 on Keywords was added editorally in November 1997.
1. Scope
1.1This test method provides two procedures for measuring bond strength of mortar to masonry units: a crossed brick couplet
tensile test for evaluating mortar-brick bonding and a stacked-bond, flexural test for evaluating mortar-concrete block bonding.
1.2
1.1 This test method provides two procedures for measuring bond strength of mortar to masonry units: a crossed brick couplet
tensile test for evaluating mortar-brick bond strength and a stacked-bond, flexural test for evaluating mortar-concrete block bond
strength.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address 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 offor Sampling and Testing Brick and Structural Clay Tile
C91Specification for Masonry Cement
90 Specification for Loadbearing Concrete Masonry Units
3
C109Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or 50-mm Cube Specimens)
129 Specification for Nonloadbearing Concrete Masonry Units
3
C190Test Method for Tensile Strength of Hydraulic Cement Mortars
3
C230Specification for FlowTable for Use inTests of Hydraulic Cement 140 Test Methods for Sampling andTesting Concrete
Masonry Units and Related Units
C 270 Specification for Mortar for Unit Masonry
3
C305Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
780 Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
C427Test Method for Moisture Condition of Hardened Concrete by the Relative Humidity Method 1072 Test Method for
Measurement of Masonry Flexural Bond Strength
C 1357 Test Methods for Evaluating Masonry Bond Strength
C 1437 Test Method for Flow of Hydraulic Cement Mortar
E 518 Test Methods for Flexural Bond Strength of Masonry
3. Significance and Use
3.1These procedures are useful for research into bonding of masonry. They are not intended to predict the bond strength of
commercial masonry construction. The bonding in commercially built structures is determined by many factors beyond the
characteristics of mortar, masonry units, and the procedures of this test method.
3.1 These procedures are useful for research into bond strength of masonry. They are not intended to predict the bond strength
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC15onManufacturedMasonryUnitsandisthedirectresponsibilityofSubcommitteeC15.04onResearch.
Committee E-6 maintains a continued interest in these practices and will make use of them in the future.
Current edition approved April 15, 1991. Published June 1991. Originally published as E149–59T. Redesignated C952–76 in 1981. Last previous edition C952–86.
´1
Current edition approved June 1, 2009. Published July 2009. Originally approved in 1959. Last previous edition approved in 2002 as C 952 – 02 .
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. ForAnnualBookofASTMStandards
, Vol 04.05.volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C952–02 (2009)
of commercial masonry construction. The bond strength in commercially built structures is determined by many factors beyond
the characteristics of mortar, masonry units, and the procedures of this test method.
NOTE 1—T
...
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