ASTM C270-02

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-Aug-2002
• 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 C270-01a - Standard Specification for Mortar for Unit Masonry
• Effective Date: 10-Aug-2002
• Replaced By: ASTM C270-03 - Standard Specification for Mortar for Unit Masonry
• Effective Date: 10-Jan-2003
• Referred By: ASTM C141/C141M-14(2022) - Standard Specification for Hydrated Hydraulic Lime for Structural Purposes
• Effective Date: 10-Aug-2002
• Referred By: ASTM C1714/C1714M-23 - Standard Specification for Preblended Dry Mortar Mix for Unit Masonry
• Effective Date: 10-Aug-2002
• Referred By: ASTM C1283-15(2021) - Standard Practice for Installing Clay Flue Lining
• Effective Date: 10-Aug-2002
• Referred By: ASTM C1713-23 - Standard Specification for Mortars for the Repair of Historic Masonry
• Effective Date: 10-Aug-2002
• Referred By: ASTM C1791-16(2021) - Standard Guide for Reduction of Efflorescence Potential in New Unit Pavement Systems
• Effective Date: 10-Aug-2002
• Referred By: ASTM C1314-23a - Standard Test Method for Compressive Strength of Masonry Prisms
• Effective Date: 10-Aug-2002
• Referred By: ASTM C1780-23a - Standard Practice for Installation Methods for Cement-based Adhered Masonry Veneer
• Effective Date: 10-Aug-2002
• Referred By: ASTM E2260-21a - Standard Guide for Repointing (Tuckpointing) Historic Masonry
• Effective Date: 10-Aug-2002
• Referred By: ASTM C1324-20a - Standard Test Method for Examination and Analysis of Hardened Masonry Mortar
• Effective Date: 10-Aug-2002
• Referred By: ASTM C946-23 - Standard Practice for Construction of Dry-Stacked, Surface-Bonded Walls
• Effective Date: 10-Aug-2002
• Referred By: ASTM C1692-18 - Standard Practice for Construction and Testing of Autoclaved Aerated Concrete (AAC) Masonry
• Effective Date: 10-Aug-2002
• Referred By: ASTM C1403-22a - Standard Test Method for Rate of Water Absorption of Masonry Mortars
• Effective Date: 10-Aug-2002
• Referred By: ASTM E1602-03(2017) - Standard Guide for Construction of Solid Fuel Burning Masonry Heaters
• Effective Date: 10-Aug-2002

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 – 02
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 128 Test Method for Density, Relative Density (Specific
3
Gravity), and Absorption of Fine Aggregates
1.1 This specification covers mortars for use in the construc-
4
C 144 Specification for Aggregate for Masonry Mortar
tion of non-reinforced and reinforced unit masonry structures.
2
C 150 Specification for Portland Cement
Four types of mortar are covered in each of two alternative
2
C 188 Test Method for Density of Hydraulic Cement
specifications: (1) proportion specifications and (2) property
C 207 Specification for Hydrated Lime for Masonry Pur-
specifications.
2
poses
1.2 The proportion or property specifications shall govern as
C 305 Practice for Mechanical Mixing of Hydraulic Cement
specified.
2
Pastes and Mortars of Plastic Consistency
NOTE 1—When the property specification is used to qualify masonry
C 511 Specification for Moist Cabinets, Moist Rooms, and
mortars, the testing laboratory performing the test metnods should be
Water Storage Tanks Used in the Testing of Hydraulic
accredited in accordance with Practice C 1093.
2
Cements and Concretes
1.3 When neither proportion or property specifications are 2
C 595 Specification for Blended Hydraulic Cements
specified, the proportion specifications shall govern, unless
C 780 Test Method for Preconstruction and Construction
data are presented to and accepted by the specifier to show that
Evaluation of Mortars for Plain and Reinforced Unit
4
mortar meets the requirements of the property specifications.
Masonry
1.4 The text of this standard references notes and footnotes
C 979 Specification for Pigments for Integrally Colored
3
which provide explanatory material. These notes and footnotes
Concrete
(excluding those in tables and figures) shall not be considered
C 1093 Standard Practice for Accreditation of Testing
4
as requirements of the standard.
Agencies for Unit Masonry
2
1.5 The following safety hazards caveat pertains only to the
C 1157 Performance Specification for Hydraulic Cement
test methods section of this specification: This standard does
C 1324 Test Method for Examination and Analysis of Hard-
4
not purport to address all of the safety concerns, if any,
ened Masonry Mortar
2
associated with its use. It is the responsibility of the user of this
C 1329 Specification for Mortar Cement
2
standard to establish appropriate safety and health practices
C 1489 Specification for Lime Putty
and determine the applicability of regulatory limitations prior
E 514 Test Method for Water Penetration and Leakage
4
to use.
Through Masonry
E 518 Test Methods for Flexural Bond Strength of Ma-
2. Referenced Documents
4
sonry
2.1 ASTM Standards: 5
2.2 Masonry Industry Council:
2
C 5 Specification for Quicklime for Structural Purposes
Hot and Cold Weather Masonry Construction Manual, Janu-
2
C 91 Specification for Masonry Cement
ary 1999
C 109 Test Method for Compressive Strength of Hydraulic
Cement Mortars (Using 2-in. or [50-mm] Cube Speci- 3. Specification Limitations
2
mens)
3.1 Specification C 270 is not a specification to determine
C 110 Test Methods for Physical Testing of Quicklime,
mortar strengths through field testing.
2
Hydrated Lime, and Limestone
3.2 Laboratory testing of mortar to ensure compliance with
the property specification requirements of this specification
shall be performed in accordance with 5.3. The property
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-
3
mittee C12.03 on Specifications for Mortars. Annual Book of ASTM Standards, Vol 04.02.
4
Current edition approved Aug. 10, 2002. Published October 2002. Originally Annual Book of ASTM Standards, Vol 04.05.
5
published as C 270–51T. Last previous edition C 270–01a. Available from the Mason Contractors Association of America, 1910 South
2
Annual Book of ASTM Standards, Vol 04.01. 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.
C270–0
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