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ASTM C952-12

(Test Method)

Standard Test Method for Bond Strength of Mortar to Masonry Units (Withdrawn 2018)

Standard Test Method for Bond Strength of Mortar to Masonry Units (Withdrawn 2018)

SIGNIFICANCE AND USE
3.1 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 Methods C1072 and Test Methods E518.
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.
WITHDRAWN RATIONALE
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.
Formerly under the jurisdiction of Committee C15 on Manufactured Masonry Units, this test method was withdrawn in December 2017 and replaced by Test Methods C1072 for Measurement of Masonry Flexural Bond Strength and E518/E518M for Flexural Bond Strength of Masonry.1

General Information

Status
Withdrawn
Publication Date
31-May-2012
ICS
91.100.10 - Cement. Gypsum. Lime. Mortar
Technical Committee
C15 - Manufactured Masonry Units
Drafting Committee
C15.04 - Research
Current Stage
Ref Project

Relations

Replaced By
ASTM C1072-22 - Standard Test Methods for Measurement of Masonry Flexural Bond Strength
Effective Date
12-Jan-2018
Referred By
ASTM C270-19ae1 - Standard Specification for Mortar for Unit Masonry
Effective Date
01-Jun-2012

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ASTM C952-12 - Standard Test Method for Bond Strength of Mortar to Masonry Units (Withdrawn 2018)ASTM C952-12 - Standard Test Method for Bond Strength of Mortar to Masonry Units (Withdrawn 2018)
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ASTM C952-12 - Standard Test Method for Bond Strength of Mortar to Masonry Units (Withdrawn 2018)
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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
Designation: C952 − 12
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 U.S. Department of Defense.
1. Scope* C1437 Test Method for Flow of Hydraulic Cement Mortar
E518 Test Methods for Flexural Bond Strength of Masonry
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 The values stated in inch-pound units are to be regarded
strength in commercially built structures is determined by
as standard. The values given in parentheses are mathematical
many factors beyond the characteristics of mortar, masonry
conversions to SI units that are provided for information only
units, and the procedures of this test method.
and are not considered standard.
NOTE 1—The crossed-brick couplets method measures a direct tensile
1.3 This standard does not purport to address the safety
strength of the bond between the mortar and masonry unit. It does not
concerns, if any, associated with its use. It is the responsibility
determine the flexural strength of the unit mortar assembly. Other test
of the user of this standard to establish appropriate safety and
methods may be more appropriate for determining the flexural bond
health practices and determine the applicability of regulatory strength between mortar and masonry units. These include Test Methods
C1072 and Test Methods E518.
limitations prior to use.
PREPARATION AND TESTING OF FRESH MORTAR
2. Referenced Documents
2
2.1 ASTM Standards:
4. Preparation of Mortar
C67 Test Methods for Sampling and Testing Brick and
4.1 Proportion mortar materials by weights equivalent to
Structural Clay Tile
volume proportions to be used in prism construction. Use unit
C90 Specification for Loadbearing Concrete Masonry Units
weights for individual materials as given in Specification
C129 Specification for Nonloadbearing Concrete Masonry
C270. Sand shall be permitted to be used in a damp loose
Units
condition,providedthatmoisturecontentofsandisdetermined
C140 Test Methods for Sampling and Testing Concrete
with reference to the oven-dried condition and batch propor-
Masonry Units and Related Units
tions are adjusted accordingly. Record weight of ingredients
C270 Specification for Mortar for Unit Masonry
(including water) added to the batch of mortar.
C780 Test Method for Preconstruction and Construction
4.2 Mix mortar in a mechanical paddle-type mortar mixer.
Evaluation of Mortars for Plain and Reinforced Unit
Time periods referenced below are measured from when water
Masonry
and cementitious materials are combined.
C1072 Test Methods for Measurement of Masonry Flexural
4.2.1 Add an estimated amount of water to the mortar to
Bond Strength
achieve the desired consistency (Note 2). Mix mortar for three
minutes and determine consistency. If the desired consistency
1 is specified by flow determine it in accordance with Test
This test method is under the jurisdiction of ASTM Committee C15 on
Manufactured Masonry Units and is the direct responsibility of Subcommittee
Method C1437. If the desired consistency is specified as initial
C15.04 on Research. Committee E-6 maintains a continued interest in these
cone penetration, determine it in accordance with Test Method
practices and will make use of them in the future.
C780.Onceconsistencyisrecorded,returnthematerialusedto
CurrenteditionapprovedJune1,2012.PublishedJuly2012.Originallyapproved
measure the consistency to the mixer. If the consistency is
in 1959. Last previous edition approved in 2009 as C952 – 02 (2009). DOI:
10.1520/C0952-12.
within the desired range, continue mixing the batch for an
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
additional two minutes. If the consistency is less than the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
desired range, add water to the batch and mix for one minute
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. and determine consistency. Once consistency is recorded,
*A Summary of Changes section appears at the end of this standard
C
...

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FIG. 1 Example of LCC Exo Profile
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5.1 During preconstruction and construction evaluations, use of these test methods establishes specific and overall performance characteristics for the mortar system.  
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5.2.4 Mortar ...
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1.1 These test methods cover procedures for the sampling and testing of mortars for composition and for their plastic and hardened properties, either before or during their actual use in construction.
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1.2 Table of Contents:    
Scope  
1  
Referenced Documents  
2  
Terminology  
3  
Delivery and Storage of Materials  
4  
Materials  
5  
Requirements for Substrates to Receive Metal Lathing & Furring  
6  
Installation  
7  
Workmanship  
7.1  
Installation of Metal Furring for Walls  
7.2  
Installation of Metal Plaster Bases  
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7.4  
Keywords  
8  
Installation of Metal Furring for Suspended Ceilings  
Annex A1  
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1.4 Where a specific degree of sound control is required for plastered assemblies and constructions, details of construction shall be in accordance with official reports of tests conducted in recognized testing laboratories in accordance with the applicable requirements of Test Method E90.  
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