ASTM C270-03b

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: 30-Nov-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 C270-03a - Standard Specification for Mortar for Unit Masonry
• Effective Date: 01-Dec-2003
• Replaced By: ASTM C270-04 - Standard Specification for Mortar for Unit Masonry
• Effective Date: 01-Aug-2004
• Referred By: ASTM C1403-22a - Standard Test Method for Rate of Water Absorption of Masonry Mortars
• Effective Date: 01-Dec-2003
• Referred By: ASTM C387/C387M-23 - Standard Specification for Packaged, Dry, Combined Materials for Concrete and High Strength Mortar
• Effective Date: 01-Dec-2003
• Referred By: ASTM D7147-21 - Standard Specification for Testing and Establishing Allowable Loads of Joist Hangers
• Effective Date: 01-Dec-2003
• Referred By: ASTM E514/E514M-20 - Standard Test Method for Water Penetration and Leakage Through Masonry
• Effective Date: 01-Dec-2003
• Referred By: ASTM C51-21 - Standard Terminology Relating to Lime and Limestone (as Used by the Industry)
• Effective Date: 01-Dec-2003
• Referred By: ASTM C1780-23a - Standard Practice for Installation Methods for Cement-based Adhered Masonry Veneer
• Effective Date: 01-Dec-2003
• Referred By: ASTM E754-80(2022) - Standard Test Method for Pullout Resistance of Ties and Anchors Embedded in Masonry Mortar Joints
• Effective Date: 01-Dec-2003
• Referred By: ASTM C1707-18 - Standard Specification for Pozzolanic Hydraulic Lime for Structural Purposes
• Effective Date: 01-Dec-2003
• Referred By: ASTM E1602-03(2017) - Standard Guide for Construction of Solid Fuel Burning Masonry Heaters
• Effective Date: 01-Dec-2003
• Referred By: ASTM C1400-11(2017) - Standard Guide for Reduction of Efflorescence Potential in New Masonry Walls
• Effective Date: 01-Dec-2003
• Referred By: ASTM C780-23 - Standard Test Methods for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
• Effective Date: 01-Dec-2003
• Referred By: ASTM C1713-23 - Standard Specification for Mortars for the Repair of Historic Masonry
• Effective Date: 01-Dec-2003
• Referred By: ASTM C946-23 - Standard Practice for Construction of Dry-Stacked, Surface-Bonded Walls
• Effective Date: 01-Dec-2003

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: C 270 – 03b
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.
1. Scope* C 110 Test Methods for Physical Testing of Quicklime,
Hydrated Lime, and Limestone
1.1 This specification covers mortars for use in the construc-
C 128 Test Method for Density, Relative Density (Specific
tion of non-reinforced and reinforced unit masonry structures.
Gravity), and Absorption of Fine Aggregates
Four types of mortar are covered in each of two alternative
C 144 Specification for Aggregate for Masonry Mortar
specifications: (1) proportion specifications and (2) property
C 150 Specification for Portland Cement
specifications.
C 188 Test Method for Density of Hydraulic Cement
1.2 The proportion or property specifications shall govern as
C 207 Specification for Hydrated Lime for Masonry Pur-
specified.
poses
1.3 When neither proportion or property specifications are
C 305 Practice for Mechanical Mixing of Hydraulic Cement
specified, the proportion specifications shall govern, unless
Pastes and Mortars of Plastic Consistency
data are presented to and accepted by the specifier to show that
C 511 Specification for Moist Cabinets, Moist Rooms, and
mortar meets the requirements of the property specifications.
Water Storage Tanks Used in the Testing of Hydraulic
1.4 The text of this standard references notes and footnotes
Cements and Concretes
which provide explanatory material. These notes and footnotes
C 595 Specification for Blended Hydraulic Cements
(excluding those in tables and figures) shall not be considered
C 780 Test Method for Preconstruction and Construction
as requirements of the standard.
Evaluation of Mortars for Plain and Reinforced Unit
1.5 The terms used in this standard are identified in Stan-
Masonry
dard C 1180.
C 952 Test Method for Bond Strength of Mortar to Masonry
1.6 The following safety hazards caveat pertains only to the
Units
test methods section of this specification: This standard does
C 1072 Test Method for Measurement of Masonry Flexural
not purport to address all of the safety concerns, if any,
Bond Strength
associated with its use. It is the responsibility of the user of this
C 979 Specification for Pigments for Integrally Colored
standard to establish appropriate safety and health practices
Concrete
and determine the applicability of regulatory limitations prior
C 1157 Performance Specification for Hydraulic Cement
to use.
C 1180 Terminology of Mortar and Grout for Unit Masonry
2. Referenced Documents C 1324 Test Method for Examination and Analysis of Hard-
2
ened Masonry Mortar
2.1 ASTM Standards:
C 1329 Specification for Mortar Cement
C 5 Specification for Quicklime for Structural Purposes
C 1357 Test Methods for Evaluating Masonry Bond
C 91 Specification for Masonry Cement
Strength
C 109 Test Method for Compressive Strength of Hydraulic
E 72 Test Methods of Conducting Strength Tests of Panels
Cement Mortars (Using 2-in. or [50-mm] Cube Speci-
for Building Construction
mens)
E 514 Test Method for Water Penetration and Leakage
Through Masonry
1
This specification is under the jurisdiction of ASTM Committee C12 on E 518 Test Methods for Flexural Bond Strength of Masonry
3
Mortars and Grouts for Unit Masonry and is the direct responsibility of Subcom-
2.2 Masonry Industry Council:
mittee C12.03 on Specifications for Mortars.
Hot and Cold Weather Masonry Construction Manual, Janu-
Current edition approved December 1, 2003. Published January 2004. Originally
ary 1999
approved in 1951. Last previous edition approved in 2003 as C 270–03a.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from the Mason Contractors Association of America, 1910 South
the ASTM website. 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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C 270 – 03b
3. Specification Limitations 4.1.1.8 Hydrated Lime—Specification C 207, Types S or
SA. Types N or NA limes are permitted if shown by test or
3.1 Specification C 270 is not a specification to determine
performance record to be not detrimental to the soundness of
mortar strengths t
...