ASTM C1384 - 12a

    Standard Specification for Admixtures for Masonry Mortars

    Active Standard ASTM C1384 | Developed by Subcommittee: C12.03

    Book of Standards Volume: 04.05


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    Abstract

    This specification pertains to admixtures for masonry mortars. Admixtures are substances other than the prescribed materials of water, aggregate, and cementitious materials that are used to improve one or more of the recognized desirable properties of conventional masonry mortar. Admixtures are classified by their effect on the performance characteristics of conventional masonry mortars. Admixed mortars are classified by their modified properties, as compared to a reference mortar. The following classifications are recognized: bond enhancer, workability enhancer, set accelerator, set retarder, and water repellent. The materials to be used include Portland cement, hydraulic cement, blended hydraulic cement, masonry cement, mortar cement, lime, and sand. Different test methods shall be implemented in order to determine the following properties: soluble chloride content, compressive strength, water retention, air content of plastic mortar, board life, time of setting, flexural bond strength, and rate of water absorption.

    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 pertains to admixtures for masonry mortars. Admixtures are substances other than Specification C270 prescribed materials of water, aggregate, and cementitious materials that are used to improve one or more of the recognized desirable properties of conventional masonry mortar.

    1.2 This specification does not cover coloring pigments.

    Note 1Information on coloring pigments can be found in Specification C979.

    1.3 This specification does not cover additives that are added to the cementitious materials during the manufacture of the cementitious materials.

    1.4 Acceptance of an admixture is based on its performance in an admixed mortar. Acceptance of the admixed masonry mortar is based on attainment of performance either equivalent to that required for conventional mortar or improved performance of one or more indicated properties, while maintaining required performance levels for other properties.

    1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

    Note 2The testing laboratory performing the test methods referenced in this specification should be evaluated in accordance with Practice C1093.


    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

    C91 Specification for Masonry Cement

    C144 Specification for Aggregate for Masonry Mortar

    C150 Specification for Portland Cement

    C207 Specification for Hydrated Lime for Masonry Purposes

    C270 Specification for Mortar for Unit Masonry

    C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency

    C403/C403M Test Method for Time of Setting of Concrete Mixtures by Penetration Resistance

    C595 Specification for Blended Hydraulic Cements

    C723 Practice for Chemical-Resistant Resin Grouts for Brick or Tile

    C778 Specification for Sand

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

    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

    C1152/C1152M Test Method for Acid-Soluble Chloride in Mortar and Concrete

    C1157 Performance Specification for Hydraulic Cement

    C1218/C1218M Test Method for Water-Soluble Chloride in Mortar and Concrete

    C1329 Specification for Mortar Cement

    C1403 Test Method for Rate of Water Absorption of Masonry Mortars

    C1437 Test Method for Flow of Hydraulic Cement Mortar


    ICS Code

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

    UNSPSC Code

    UNSPSC Code 30111504(Mortars)


    DOI: 10.1520/C1384-12A

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