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

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/C1384-12A

ASTM International is a member of CrossRef.

ASTM C1384