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ASTM C952-02e1

(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, C 1072 Test Method for Measurement of Masonry Flexural Bond Strength, C 1357 Test Methods for Evaluating Masonry Bond Strength, and E 518 Test Methods for Flexural Bond Strength of Masonry.
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 bonding and a stacked-bond, flexural test for evaluating mortar-concrete block bonding.
1.2 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.

General Information

Status
Historical
Publication Date
09-Dec-2002
ICS
91.100.10 - Cement. Gypsum. Lime. Mortar
Technical Committee
C15 - Manufactured Masonry Units
Drafting Committee
C15.04 - Research
Current Stage
Ref Project

Relations

Replaces
ASTM C952-02 - Standard Test Method for Bond Strength of Mortar to Masonry Units
Effective Date
10-Dec-2002
Replaced By
ASTM C952-02(2009) - Standard Test Method for Bond Strength of Mortar to Masonry Units
Effective Date
01-Jun-2009
Referred By
ASTM C270-19ae1 - Standard Specification for Mortar for Unit Masonry
Effective Date
10-Dec-2002

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ASTM C952-02e1 - Standard Test Method for Bond Strength of Mortar to Masonry UnitsASTM C952-02e1 - Standard Test Method for Bond Strength of Mortar to Masonry Units
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ASTM C952-02e1 - Standard Test Method for Bond Strength of Mortar to Masonry Units
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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
´1
Designation:C952–02
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—Editorial changes were made throughout in December 2003.
1. Scope* E 518 Test Methods for Flexural Bond Strength of Ma-
2
sonry
1.1 This test method provides two procedures for measuring
bond strength of mortar to masonry units: a crossed brick
3. Significance and Use
couplet tensile test for evaluating mortar-brick bond strength
3.1 These procedures are useful for research into bond
andastacked-bond,flexuraltestforevaluatingmortar-concrete
strength of masonry. They are not intended to predict the bond
block bond strength.
strength of commercial masonry construction. The bond
1.2 This standard does not purport to address the safety
strength in commercially built structures is determined by
concerns, if any, associated with its use. It is the responsibility
many factors beyond the characteristics of mortar, masonry
of the user of this standard to establish appropriate safety and
units, and the procedures of this test method.
health practices and determine the applicability of regulatory
limitations prior to use.
NOTE 1—The crossed-brick couplets method measures a direct tensile
strength of the bond between the mortar and masonry unit. It does not
2. Referenced Documents
determine the flexural strength of the unit mortar assembly. Other test
methods may be more appropriate for determining the flexural bond
2.1 ASTM Standards:
strength between mortar and masonry units. These include, C 1072 Test
C67 Test Methods of Sampling and Testing Brick and
Method for Measurement of Masonry Flexural Bond Strength, C 1357
2
Structural Clay Tile
Test Methods for Evaluating Masonry Bond Strength, and E 518 Test
C90 Specification for Loadbearing Concrete Masonry
Methods for Flexural Bond Strength of Masonry.
2
Units
PREPARATION AND TESTING OF FRESH MORTAR
C 129 Specification for Nonloadbearing Concrete Masonry
2
Units
4. Preparation of Mortar
C 140 Test Methods of Sampling and Testing Concrete
2
4.1 Proportion mortar materials by weights equivalent to
Masonry Units and Related Units
2
volume proportions to be used in prism construction. Use unit
C 270 Specification for Mortar for Unit Masonry
weights for individual materials as given in Specification
C 780 Test Method for Preconstruction and Construction
C 270. Sand shall be permitted to be used in a damp loose
Evaluation of Mortars for Plain and Reinforced Unit
2
condition,providedthatmoisturecontentofsandisdetermined
Masonry
with reference to the oven-dried condition and batch propor-
C 1072 Test Method for Measurement of Masonry Flexural
2
tions are adjusted accordingly. Record weight of ingredients
Bond Strength
(including water) added to the batch of mortar.
C 1357 Test Method for Evaluating Masonry Bond
2
4.2 Mix mortar in a mechanical paddle-type mortar mixer.
Strength
Time periods referenced below are measured from when water
C 1437 Test Method For Flow of Hydraulic Cement Mor-
3
and cementitious materials are combined.
tar
4.2.1 Add an estimated amount of water to the mortar to
achieve the desired consistency (Note 2). Mix mortar for three
1
This test method is under the jurisdiction of ASTM Committee C15 on
minutes and determine consistency. If the desired consistency
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
practices and will make use of them in the future. MethodC 1437.Ifthedesiredconsistencyisspecifiedasinitial
Current edition approved Aug. 18, 2003. Published March 2003. Originally
cone penetration, determine it in accordance with Test Method
published as E 149 – 59 T. Redesignated C 952 – 76 in 1981. Last previous edition
C 780. Once consistency is recorded, return the material used
C 952 – 91 (1997).
2
to measure the consistency to the mixer. If the consistency is
Annual Book of ASTM Standards, Vol 04.05.
3
Annual Book of ASTM Standards, Vol 04.01.
*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 ----------------------
´1
C952–02
within the desired range, continue mixing the batch for an 6. Crossed-Brick Couplets
additional two minutes. If the co
...

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4.1 The results of mortar mixture tests can be suitable for comparing the relative performance of combinations of concrete-making materials such as fine aggregate, chemical admixtures, supplementary cementitious materials (SCMs), water, and hydraulic cement. Furthermore, this guide can be useful to identify unexpected performances due to combination of various materials. The relative trends in performance observed with the mortar method may suggest relative performance in concrete mixtures batched with the same materials and relative mixture proportions.  
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