ASTM C270-08a
(Specification)Standard Specification for Mortar for Unit Masonry
Standard Specification for Mortar for Unit Masonry
ABSTRACT
This specification covers mortars for use in the construction of non-reinforced and reinforced unit masonry structures. Four types of mortar are covered in each of two alternative specifications: (1) proportion specifications and (2) property specifications. The property specification applies to mortar mixed to a specific flow in the laboratory. When neither proportion nor property specifications are specified, the proportion specifications shall govern, unless data are presented to and accepted by the specifier to show that mortar meets the requirements of the property specifications. This specification does not cover the determination of mortar strengths through field testing. The compressive strength values resulting from field tested mortars do not represent the compressive strength of mortar tested in the laboratory nor that of the mortar in the wall. Physical properties of field sampled mortar shall not be used to determine compliance to this specification and are not intended as criteria to determine the acceptance of rejection of the mortar. Compliance to this specification is verified by confirming that the materials used are as specified, meet the requirements as given, and added to the mixer in the proper proportions as described.
SCOPE
1.1 This specification covers mortars for use in the construction of non-reinforced and reinforced unit masonry structures. Four types of mortar are covered in each of two alternative specifications: (1) proportion specifications and (2) property specifications.
Note 1—When the property specification is used to qualify masonry mortars, the testing agency performing the test methods should be evaluated in accordance with Practice C 1093.
1.2 The proportion or property specifications shall govern as specified.
1.3 When neither proportion or property specifications are specified, the proportion specifications shall govern, unless data are presented to and accepted by the specifier to show that mortar meets the requirements of the property specifications.
1.4 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
1.5 The terms used in this specification are identified in Terminologies C 1180 and C 1232.
1.6 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.
1.7 The following safety hazards caveat pertains only to the test methods section of this specification: 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: C270 – 08a
Standard Specification for
1
Mortar for Unit Masonry
This standard is issued under the fixed designation C270; 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* 2. Referenced Documents
2
1.1 Thisspecificationcoversmortarsforuseintheconstruc- 2.1 ASTM Standards:
tion of non-reinforced and reinforced unit masonry structures. C5 Specification for Quicklime for Structural Purposes
Four types of mortar are covered in each of two alternative C91 Specification for Masonry Cement
specifications: (1) proportion specifications and (2) property C109/C109M Test Method for Compressive Strength of
specifications. Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
Specimens)
NOTE 1—When the property specification is used to qualify masonry
C110 Test Methods for Physical Testing of Quicklime,
mortars, the testing agency performing the test methods should be
Hydrated Lime, and Limestone
evaluated in accordance with Practice C1093.
C128 Test Method for Density, Relative Density (Specific
1.2 Theproportionorpropertyspecificationsshallgovernas
Gravity), and Absorption of Fine Aggregate
specified.
C144 Specification for Aggregate for Masonry Mortar
1.3 When neither proportion or property specifications are
C150 Specification for Portland Cement
specified, the proportion specifications shall govern, unless
C188 Test Method for Density of Hydraulic Cement
data are presented to and accepted by the specifier to show that
C207 Specification for Hydrated Lime for Masonry Pur-
mortar meets the requirements of the property specifications.
poses
1.4 The text of this specification references notes and
C305 Practice for Mechanical Mixing of Hydraulic Cement
footnotes which provide explanatory material. These notes and
Pastes and Mortars of Plastic Consistency
footnotes (excluding those in tables and figures) shall not be
C511 Specification for Mixing Rooms, Moist Cabinets,
considered as requirements of the standard.
Moist Rooms, and Water Storage Tanks Used in the
1.5 The terms used in this specification are identified in
Testing of Hydraulic Cements and Concretes
Terminologies C1180 and C1232.
C595 Specification for Blended Hydraulic Cements
1.6 The values stated in inch-pound units are to be regarded
C780 Test Method for Preconstruction and Construction
as standard. The values given in parentheses are mathematical
Evaluation of Mortars for Plain and Reinforced Unit
conversions to SI units that are provided for information only
Masonry
and are not considered standard.
C952 Test Method for Bond Strength of Mortar to Masonry
1.7 The following safety hazards caveat pertains only to the
Units
test methods section of this specification: This standard does
C979 Specification for Pigments for Integrally Colored
not purport to address all of the safety concerns, if any,
Concrete
associated with its use. It is the responsibility of the user of this
C1072 Test Method for Measurement of Masonry Flexural
standard to establish appropriate safety and health practices
Bond Strength
and determine the applicability of regulatory limitations prior
C1093 Practice for Accreditation of Testing Agencies for
to use.
Masonry
C1157 Performance Specification for Hydraulic Cement
C1180 Terminology of Mortar and Grout for Unit Masonry
1
This specification is under the jurisdiction of ASTM Committee C12 on
Mortars and Grouts for Unit Masonry and is the direct responsibility of Subcom-
2
mittee C12.03 on Specifications for Mortars. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2008. Published November 2008. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1951. Last previous edition approved in 2008 as C270 – 08. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C0270-08A. 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 ----------------------
C270 – 08a
C1232 Terminology of Masonry 4.1.1.8 Hydrated Lime—Specification C207, Types S or
C1324 Test Method for Examination andAnalysis of Hard- SA. Types N or NA limes are permitted if shown by test or
performance record to be not detrimental to the soundness of
ened Masonry Mortar
C1329 Specification for Mortar Cement the mortar.
C1357 Test Methods for Evaluating Masonry Bond 4.1.1.9 Lime Putty—S
...
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:C270–08 Designation: C 270 – 08a
Standard Specification for
1
Mortar for Unit Masonry
This standard is issued under the fixed designation C 270; 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 This specification covers mortars for use in the construction of non-reinforced and reinforced unit masonry structures. Four
types of mortar are covered in each of two alternative specifications: (1) proportion specifications and (2) property specifications.
NOTE 1—When the property specification is used to qualify masonry mortars, the testing agency performing the test methods should be evaluated in
accordance with Practice C 1093.
1.2 The proportion or property specifications shall govern as specified.
1.3 When neither proportion or property specifications are specified, the proportion specifications shall govern, unless data are
presented to and accepted by the specifier to show that mortar meets the requirements of the property specifications.
1.4 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the standard.
1.5 The terms used in this specification are identified in Terminologies C 1180 and C 1232.
1.6 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.
1.7 The following safety hazards caveat pertains only to the test methods section of this specification: 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:
C 5 Specification for Quicklime for Structural Purposes
C 91 Specification for Masonry Cement
C 109/C 109M TestMethodforCompressiveStrengthofHydraulicCementMortars(Using2-in.or[50-mm]CubeSpecimens)
C 110 Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone
C 128 Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate
C 144 Specification for Aggregate for Masonry Mortar
C 150 Specification for Portland Cement
C 188 Test Method for Density of Hydraulic Cement
C 207 Specification for Hydrated Lime for Masonry Purposes
C 305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
C 511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of
Hydraulic Cements and Concretes
C 595 Specification for Blended Hydraulic Cements
C 780 Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
C 952 Test Method for Bond Strength of Mortar to Masonry Units
C 979 Specification for Pigments for Integrally Colored Concrete
C 1072 Test Method for Measurement of Masonry Flexural Bond Strength
C 1093 Practice for Accreditation of Testing Agencies for Masonry
C 1157 Performance Specification for Hydraulic Cement
1
This specification is under the jurisdiction of ASTM Committee C12 on Mortars and Grouts for Unit Masonry and is the direct responsibility of Subcommittee C12.03
on Specifications for Mortars.
Current edition approvedAug.Nov. 1, 2008. Published SeptemberNovember 2008. Originally approved in 1951. Last previous edition approved in 20072008 as C270–07a.
C 270 – 08.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM 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 ----------------------
C 270 – 08a
C 1180 Terminology of Mortar and Grout for Unit Masonry
C 1232 Terminology of Masonry
C 1324 Test Method for Examination and Anal
...
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:C270–08 Designation: C 270 – 08a
Standard Specification for
1
Mortar for Unit Masonry
This standard is issued under the fixed designation C 270; 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 This specification covers mortars for use in the construction of non-reinforced and reinforced unit masonry structures. Four
types of mortar are covered in each of two alternative specifications: (1) proportion specifications and (2) property specifications.
NOTE 1—When the property specification is used to qualify masonry mortars, the testing agency performing the test methods should be evaluated in
accordance with Practice C 1093.
1.2 The proportion or property specifications shall govern as specified.
1.3 When neither proportion or property specifications are specified, the proportion specifications shall govern, unless data are
presented to and accepted by the specifier to show that mortar meets the requirements of the property specifications.
1.4 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the standard.
1.5 The terms used in this specification are identified in Terminologies C 1180 and C 1232.
1.6 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.
1.7 The following safety hazards caveat pertains only to the test methods section of this specification: 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:
C5 Specification for Quicklime for Structural Purposes
C91 Specification for Masonry Cement
C 109/C 109M TestMethodforCompressiveStrengthofHydraulicCementMortars(Using2-in.or[50-mm]CubeSpecimens)
C110 Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone
C 128 Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate
C 144 Specification for Aggregate for Masonry Mortar
C 150 Specification for Portland Cement
C 188 Test Method for Density of Hydraulic Cement
C 207 Specification for Hydrated Lime for Masonry Purposes
C 305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
C511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of
Hydraulic Cements and Concretes
C 595 Specification for Blended Hydraulic Cements
C 780 Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
C 952 Test Method for Bond Strength of Mortar to Masonry Units
C 979 Specification for Pigments for Integrally Colored Concrete
C 1072 Test Method for Measurement of Masonry Flexural Bond Strength
C 1093 Practice for Accreditation of Testing Agencies for Masonry
C 1157 Performance Specification for Hydraulic Cement
1
This specification is under the jurisdiction of ASTM Committee C12 on Mortars and Grouts for Unit Masonry and is the direct responsibility of Subcommittee C12.03
on Specifications for Mortars.
Current edition approvedAug.Nov. 1, 2008. Published SeptemberNovember 2008. Originally approved in 1951. Last previous edition approved in 20072008 as C270–07a.
C 270 – 08.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM 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 ----------------------
C 270 – 08a
C 1180 Terminology of Mortar and Grout for Unit Masonry
C 1232 Terminology of Masonry
C 1324 Test Method for Examination and Analysis
...
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