ASTM C270 - 14

    Standard Specification for Mortar for Unit Masonry

    Active Standard ASTM C270 | Developed by Subcommittee: C12.03

    Book of Standards Volume: 04.05


      Format Pages Price  
    PDF 14 $49.00   ADD TO CART
    Hardcopy (shipping and handling) 14 $49.00   ADD TO CART
    Standard + Redline PDF Bundle 28 $58.80   ADD TO CART


    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.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    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 C1093.

    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 This standard is not a specification to determine mortar strengths through field testing (see Section 3).

    1.5 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.

    1.6 The terms used in this specification are identified in Terminologies C1180 and C1232.

    1.7 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.

    1.8 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    C5 Specification for Quicklime for Structural Purposes

    C91 Specification for Masonry Cement

    C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens)

    C110 Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone

    C128 Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate

    C144 Specification for Aggregate for Masonry Mortar

    C150 Specification for Portland Cement

    C188 Test Method for Density of Hydraulic Cement

    C207 Specification for Hydrated Lime for Masonry Purposes

    C305 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

    C595 Specification for Blended Hydraulic Cements

    C780 Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry

    C952 Test Method for Bond Strength of Mortar to Masonry Units

    C979 Specification for Pigments for Integrally Colored Concrete

    C1072 Test Methods for Measurement of Masonry Flexural Bond Strength

    C1093 Practice for Accreditation of Testing Agencies for Masonry

    C1157 Performance Specification for Hydraulic Cement

    C1180 Terminology of Mortar and Grout for Unit Masonry

    C1232 Terminology of Masonry

    C1324 Test Method for Examination and Analysis of Hardened Masonry Mortar

    C1329 Specification for Mortar Cement

    C1384 Specification for Admixtures for Masonry Mortars

    C1489 Specification for Lime Putty for Structural Purposes

    C1506 Test Method for Water Retention of Hydraulic Cement-Based Mortars and Plasters

    C1586 Guide for Quality Assurance of Mortars

    E72 Test Methods of Conducting Strength Tests of Panels for Building Construction

    E514 Test Method for Water Penetration and Leakage Through Masonry

    E518 Test Methods for Flexural Bond Strength of Masonry

    Masonry Industry Council

    HotandColdWeatherMas January 1999


    ICS Code

    ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar)

    UNSPSC Code

    UNSPSC Code 30111504(Mortars)


    Referencing This Standard

    DOI: 10.1520/C0270-14

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM C270-14, Standard Specification for Mortar for Unit Masonry, ASTM International, West Conshohocken, PA, 2014, www.astm.org

    Back to Top