ASTM C270-03

Standard Specification for Mortar for Unit Masonry

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.
1.2 The proportion or property specifications shall govern as specified.
Note 1—When the property specification is used to qualify masonry mortars, the testing laboratory performing the test metnods should be accredited in accordance with Practice C 1093.
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 standard 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 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.

General Information

• Status: Historical
• Publication Date: 09-Jan-2003
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C12 - Mortars and Grouts for Unit Masonry
• Drafting Committee: C12.03 - Specifications for Mortars

Relations

• Replaces: ASTM C270-02 - Standard Specification for Mortar for Unit Masonry
• Effective Date: 10-Jan-2003
• Replaced By: ASTM C270-03a - Standard Specification for Mortar for Unit Masonry
• Effective Date: 10-Jan-2003
• Referred By: ASTM C901-18 - Standard Specification for Prefabricated Masonry Panels
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1324-20a - Standard Test Method for Examination and Analysis of Hardened Masonry Mortar
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1400-11(2017) - Standard Guide for Reduction of Efflorescence Potential in New Masonry Walls
• Effective Date: 10-Jan-2003
• Referred By: ASTM C780-23 - Standard Test Methods for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
• Effective Date: 10-Jan-2003
• Referred By: ASTM D7147-21 - Standard Specification for Testing and Establishing Allowable Loads of Joist Hangers
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1586-20 - Standard Guide for Quality Assurance of Mortars
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1072-22 - Standard Test Methods for Measurement of Masonry Flexural Bond Strength
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1713-23 - Standard Specification for Mortars for the Repair of Historic Masonry
• Effective Date: 10-Jan-2003
• Referred By: ASTM E754-80(2022) - Standard Test Method for Pullout Resistance of Ties and Anchors Embedded in Masonry Mortar Joints
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1283-15(2021) - Standard Practice for Installing Clay Flue Lining
• Effective Date: 10-Jan-2003
• Referred By: ASTM E2266-22 - Standard Guide for Design and Construction of Low-Rise Frame Building Wall Systems to Resist Water Intrusion
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1692-18 - Standard Practice for Construction and Testing of Autoclaved Aerated Concrete (AAC) Masonry
• Effective Date: 10-Jan-2003
• Referred By: ASTM C1314-23a - Standard Test Method for Compressive Strength of Masonry Prisms
• Effective Date: 10-Jan-2003

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 270 – 03
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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
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1. Scope* C 144 Specification for Aggregate for Masonry Mortar
2
C 150 Specification for Portland Cement
1.1 This specification covers mortars for use in the construc-
2
C 188 Test Method for Density of Hydraulic Cement
tion of non-reinforced and reinforced unit masonry structures.
C 207 Specification for Hydrated Lime for Masonry Pur-
Four types of mortar are covered in each of two alternative
2
poses
specifications: (1) proportion specifications and (2) property
C 305 Practice for Mechanical Mixing of Hydraulic Cement
specifications.
2
Pastes and Mortars of Plastic Consistency
1.2 The proportion or property specifications shall govern as
C 511 Specification for Moist Cabinets, Moist Rooms, and
specified.
Water Storage Tanks Used in the Testing of Hydraulic
1.3 When neither proportion or property specifications are
2
Cements and Concretes
specified, the proportion specifications shall govern, unless
2
C 595 Specification for Blended Hydraulic Cements
data are presented to and accepted by the specifier to show that
C 780 Test Method for Preconstruction and Construction
mortar meets the requirements of the property specifications.
Evaluation of Mortars for Plain and Reinforced Unit
1.4 The text of this standard references notes and footnotes
4
Masonry
which provide explanatory material. These notes and footnotes
C 979 Specification for Pigments for Integrally Colored
(excluding those in tables and figures) shall not be considered
3
Concrete
as requirements of the standard.
2
C 1157 Performance Specification for Hydraulic Cement
1.5 The following safety hazards caveat pertains only to the
C 1324 Test Method for Examination and Analysis of Hard-
test methods section of this specification: This standard does
4
ened Masonry Mortar
not purport to address all of the safety concerns, if any,
2
C 1329 Specification for Mortar Cement
associated with its use. It is the responsibility of the user of this
E 514 Test Method for Water Penetration and Leakage
standard to establish appropriate safety and health practices
4
Through Masonry
and determine the applicability of regulatory limitations prior
E 518 Test Methods for Flexural Bond Strength of Ma-
to use.
4
sonry
5
2. Referenced Documents 2.2 Masonry Industry Council:
Hot and Cold Weather Masonry Construction Manual, Janu-
2.1 ASTM Standards:
2
ary 1999
C 5 Specification for Quicklime for Structural Purposes
2
C 91 Specification for Masonry Cement
3. Specification Limitations
C 109 Test Method for Compressive Strength of Hydraulic
3.1 Specification C 270 is not a specification to determine
Cement Mortars (Using 2-in. or [50-mm] Cube Speci-
2 mortar strengths through field testing.
mens)
3.2 Laboratory testing of mortar to ensure compliance with
C 110 Test Methods for Physical Testing of Quicklime,
2 the property specification requirements of this specification
Hydrated Lime, and Limestone
shall be performed in accordance with 5.3. The property
C 128 Test Method for Density, Relative Density (Specific
3 specification of this standard applies to mortar mixed to a
Gravity), and Absorption of Fine Aggregates
specific flow in the laboratory.
3.3 The compressive strength values resulting from field
tested mortars do not represent the compressive strength of
1
This specification is under the jurisdiction of ASTM Committee C12 on mortar as tested in the laboratory nor that of the mortar in the
Mortars and Grouts for Unit Masonry and is the direct responsibility of Subcom-
mittee C12.03 on Specifications for Mortars.
Current edition approved January 2003. Published May 2003. Originally
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published as C 270–51T. Last previous edition C 270–02a. Annual Book of ASTM Standards, Vol 04.05.
2 5
Annual Book of ASTM Standards, Vol 04.01. Available from the Mason Contractors Association of America, 1910 South
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Annual Book of ASTM Standards, Vol 04.02. Highland Avenue, Suite 101, Lombard, IL 60148.
*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.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
C270–03
wall. Physical properties of field
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