ASTM C1072-12
(Test Method)Standard Test Methods for Measurement of Masonry Flexural Bond Strength
Standard Test Methods for Measurement of Masonry Flexural Bond Strength
SIGNIFICANCE AND USE
5.1 This test method is intended for use in comparing the bond strengths (under the given conditions) of masonry mortars.
5.2 This test method could be used, for example, to check one aspect of the quality of mortar products after production, or to indicate the bond potential of a mortar product without requiring the product to be tested in combination with many different units.
5.3 This test method uses controlled conditions of fabrication and curing that are not intended to represent field conditions.
5.4 This test method uses standard concrete masonry units. Mortars are batched by weight equivalents of volume proportions and are mixed to a prescribed flow. Prisms are constructed using a jig and are bag-cured.
5.5 Flexural bond strength determined by this test method shall not be interpreted as the flexural bond strength of a wall (because standard units are not used for wall construction), nor shall it be interpreted as an indication of extent of bond for purposes of water permeability evaluation.
SCOPE
1.1 These test methods evaluate the flexural bond strength, normal to the bed joints, of masonry built of manufactured masonry units. Sampling and testing procedures are referenced, and terms are defined. Three different specimen fabrication methods are specified, each for a different purpose:
1.1.1 The first method is the “Test Method for Laboratory-Prepared Specimens.” Its purpose is to compare the bond strengths (under the given conditions) of masonry mortars. It could be used, for example, to check the quality of mortar products after production, or to indicate the bond strength (under the given conditions) of a mortar product without requiring the product to be tested in combination with many different units. It is not intended to represent field conditions. It uses standard concrete masonry units. Mortars are batched by weight equivalents of volume proportions and are mixed to a prescribed flow. Prisms are constructed using a jig and are bag-cured.
1.1.2 The second method is the “Test Method for Field-Prepared Specimens.” Its purpose is to evaluate the bond strength (under the given conditions) of a particular unit-mortar combination, either for preconstruction evaluation of materials or for quality control purposes during construction. Mortars are batched conventionally, and the flow is not prescribed. Prisms are constructed conventionally (no jig) and are bag-cured.
1.1.3 The third method is the “Test Method for Prisms Removed from Existing Masonry.” Its purpose is to evaluate the bond strength of unit-mortar combinations of prisms cut from existing walls.
1.1.4 The three methods are not consistent, nor are they intended to be. They are intended to be used for three different purposes. To make this clear, the three methods are presented separately.
1.1.5 Appendix X1 suggests two possible criteria for assessing the bond strength values obtained using these test methods. These possible evaluation criteria are given for illustration only and are not mandatory.
1.2 The values stated in inch-pound units are to be regarded as the 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 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.
General Information
Relations
Buy Standard
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: C1072 − 12
StandardTest Methods for
1
Measurement of Masonry Flexural Bond Strength
This standard is issued under the fixed designation C1072; 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* Thesepossibleevaluationcriteriaaregivenforillustrationonly
and are not mandatory.
1.1 These test methods evaluate the flexural bond strength,
1.2 The values stated in inch-pound units are to be regarded
normal to the bed joints, of masonry built of manufactured
asthestandard.Thevaluesgiveninparenthesesaremathemati-
masonryunits.Samplingandtestingproceduresarereferenced,
cal conversions to SI units that are provided for information
and terms are defined. Three different specimen fabrication
only and are not considered standard.
methods are specified, each for a different purpose:
1.1.1 The first method is the “Test Method for Laboratory-
1.3 This standard does not purport to address all of the
Prepared Specimens.” Its purpose is to compare the bond
safety concerns, if any, associated with its use. It is the
strengths (under the given conditions) of masonry mortars. It
responsibility of the user of this standard to establish appro-
could be used, for example, to check the quality of mortar
priate safety and health practices and determine the applica-
products after production, or to indicate the bond strength
bility of regulatory limitations prior to use.
(under the given conditions) of a mortar product without
requiring the product to be tested in combination with many
2. Referenced Documents
different units. It is not intended to represent field conditions.
2
2.1 ASTM Standards:
It uses standard concrete masonry units. Mortars are batched
C67 Test Methods for Sampling and Testing Brick and
by weight equivalents of volume proportions and are mixed to
Structural Clay Tile
a prescribed flow. Prisms are constructed using a jig and are
C140 Test Methods for Sampling and Testing Concrete
bag-cured.
Masonry Units and Related Units
1.1.2 The second method is the “Test Method for Field-
C230/C230M Specification for Flow Table for Use in Tests
Prepared Specimens.” Its purpose is to evaluate the bond
of Hydraulic Cement
strength(underthegivenconditions)ofaparticularunit-mortar
C270 Specification for Mortar for Unit Masonry
combination, either for preconstruction evaluation of materials
C780 Test Method for Preconstruction and Construction
orforqualitycontrolpurposesduringconstruction.Mortarsare
Evaluation of Mortars for Plain and Reinforced Unit
batched conventionally, and the flow is not prescribed. Prisms
Masonry
are constructed conventionally (no jig) and are bag-cured.
C1232 Terminology of Masonry
1.1.3 The third method is the “Test Method for Prisms
C1437 Test Method for Flow of Hydraulic Cement Mortar
Removed from Existing Masonry.” Its purpose is to evaluate
C1532 Practice for Selection, Removal, and Shipment of
the bond strength of unit-mortar combinations of prisms cut
Manufactured Masonry Units and Masonry Specimens
from existing walls.
from Existing Construction
1.1.4 The three methods are not consistent, nor are they
2.2 Other Documents:
intended to be. They are intended to be used for three different
TMS 402/ACI 530/ASCE 5 Building Code Requirements
purposes. To make this clear, the three methods are presented
3
for Masonry Structures
separately.
4
NBS Handbook 91
1.1.5 AppendixX1suggeststwopossiblecriteriaforassess-
ing the bond strength values obtained using these test methods.
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
1
These test methods are under the jurisdiction of ASTM Committee C15 on Standards volume information, refer to the standard’s Document Summary page on
Manufactured Masonry Units and are the direct responsibility of Subcommittee the ASTM website.
3
C15.04 on Research. Available from the Masonry Standards Joint Committee, http://
Current edition approved Dec. 1, 2012. Published December 2011. Originally www.masonrystandards.org.
4
approved in 1993. Last previous edition approved in 2011 as C1072 – 11. DOI: Natrella, M. G.,Experimental Statistics, National Bureau of Standards Hand-
10.1520/C1072-12. book 91, U.S. Government Printing Office, Aug. 1, 1963, pp. 2–14.
*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 -----------------
...
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: C1072 − 11 C1072 − 12
Standard Test Methods for
1
Measurement of Masonry Flexural Bond Strength
This standard is issued under the fixed designation C1072; 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 These test methods evaluate the flexural bond strength, normal to the bed joints, of masonry built of manufactured masonry
units. Sampling and testing procedures are referenced, and terms are defined. Three different specimen fabrication methods are
specified, each for a different purpose:
1.1.1 The first method is the “Test Method for Laboratory-Prepared Specimens.” Its purpose is to compare the bond strengths
(under the given conditions) of masonry mortars. It could be used, for example, to check the quality of mortar products after
production, or to indicate the bond strength (under the given conditions) of a mortar product without requiring the product to be
tested in combination with many different units. It is not intended to represent field conditions. It uses standard concrete masonry
units. Mortars are batched by weight equivalents of volume proportions and are mixed to a prescribed flow. Prisms are constructed
using a jig and are bag-cured.
1.1.2 The second method is the “Test Method for Field-Prepared Specimens.” Its purpose is to evaluate the bond strength (under
the given conditions) of a particular unit-mortar combination, either for preconstruction evaluation of materials or for quality
control purposes during construction. Mortars are batched conventionally, and the flow is not prescribed. Prisms are constructed
conventionally (no jig) and are bag-cured.
1.1.3 The third method is the “Test Method for Prisms Removed from Existing Masonry.” Its purpose is to evaluate the bond
strength of unit-mortar combinations of prisms cut from existing walls.
1.1.4 The three methods are not consistent, nor are they intended to be. They are intended to be used for three different purposes.
To make this clear, the three methods are presented separately.
1.1.5 Appendix X1 suggests two possible criteria for assessing the bond strength values obtained using these test methods.
These possible evaluation criteria are given for illustration only and are not mandatory.
1.2 The values stated in inch-pound units are to be regarded as the 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 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
C140 Test Methods for Sampling and Testing Concrete Masonry Units and Related Units
C230/C230M Specification for Flow Table for Use in Tests of Hydraulic Cement
C270 Specification for Mortar for Unit Masonry
C780 Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
C1232 Terminology of Masonry
C1437 Test Method for Flow of Hydraulic Cement Mortar
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 Dec. 1, 2011Dec. 1, 2012. Published December 2011. Originally approved in 1993. Last previous edition approved in 20102011 as
C1072 – 10.C1072 – 11. DOI: 10.1520/C1072-11.10.1520/C1072-12.
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
---------------------- Page: 1 ----------------------
C1072 − 12
C1532 Practice for Selection, Removal, and Shipment of Manufactured Masonry Units and Mas
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.