1. Scope

1.1 This specification pertains to admixtures for masonry mortars. Admixtures are substances other than Specification C 270 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 C 979.

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.

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

Keywords

absorption; absorption rate; admixed mortar; admixture; bond enhancer; masonry mortar; set accelerator; set retarder; water repellent; workability enhancer;

ICS Code

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

DOI: 10.1520/C1384-01

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