1、Designation:C138412aStandard Specification forAdmixtures for Masonry Mortars1This standard is issued under the fixed designation C1384;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses
2、indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification pertains to admixtures for masonrymortars.Admixtures are substances other than SpecificationC270 prescribed materials of water,aggregate,and
3、cementi-tious materials that are used to improve one or more of therecognized desirable properties of conventional masonry mor-tar.1.2 This specification does not cover coloring pigments.NOTE1Information on coloring pigments can be found in Specifica-tion C979.1.3 This specification does not cover a
4、dditives that areadded to the cementitious materials during the manufacture ofthe cementitious materials.1.4 Acceptance of an admixture is based on its performancein an admixed mortar.Acceptance of the admixed masonrymortar is based on attainment of performance either equivalentto that required for
5、conventional mortar or improved perfor-mance of one or more indicated properties,while maintainingrequired performance levels for other properties.1.5 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.NOTE2The testing laboratory p
6、erforming the test methods referencedin this specification should be evaluated in accordance with PracticeC1093.2.Referenced Documents2.1 ASTM Standards:2C91 Specification for Masonry CementC144 Specification for Aggregate for Masonry MortarC150 Specification for Portland CementC207 Specification fo
7、r Hydrated Lime for Masonry Pur-posesC270 Specification for Mortar for Unit MasonryC305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plastic ConsistencyC403/C403M Test Method for Time of Setting of ConcreteMixtures by Penetration ResistanceC595 Specification for Blended Hy
8、draulic CementsC723 Practice for Chemical-Resistant Resin Grouts forBrick or TileC778 Specification for SandC780 Test Method for Preconstruction and ConstructionEvaluation of Mortars for Plain and Reinforced UnitMasonryC979 Specification for Pigments for Integrally Colored Con-creteC1072 Test Method
9、s for Measurement of Masonry FlexuralBond StrengthC1093 Practice for Accreditation of Testing Agencies forMasonryC1152/C1152M Test Method for Acid-Soluble Chloride inMortar and ConcreteC1157 Performance Specification for Hydraulic CementC1218/C1218M Test Method for Water-Soluble Chloride inMortar an
10、d ConcreteC1329 Specification for Mortar CementC1403 Test Method for Rate of Water Absorption of Ma-sonry MortarsC1437 Test Method for Flow of Hydraulic Cement Mortar3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 admixed mortar,nmasonry mortar that deviatesfrom those combinati
11、ons of materials recognized by Specifi-cation C270 in that it also contains an admixture.3.1.2 admixture,nsubstance other than the SpecificationC270 prescribed materials of water,aggregate,and cementi-tious materials that is added to a masonry mortar to modify oneor more properties of the convention
12、al masonry mortar.3.1.3 bond enhancer,nadmixture used to increase thebond strength between the masonry mortar and the masonryunit.1This specification is under the jurisdiction of ASTM Committee C12 onMortars and Grouts for Unit Masonry and is the direct responsibility of Subcom-mittee C12.03 on Spec
13、ifications for Mortars.Current edition approved Dec.15,2012.Published January 2013.Originallyapproved in 1998.Last previous approved in 2012 as edition C1384 12.DOI:10.1520/C1384-12A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org
14、.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.4 re
15、ference mortar,nmortar of the same compositionas an admixed mortar except that the reference mortar does notinclude the admixture and may contain a different amount ofwater to obtain an equivalent flow or penetration as theadmixed mortar.3.1.5 set accelerator,nadmixture used to shorten the timeof se
16、tting of a masonry mortar.3.1.6 set retarder,nadmixture used to lengthen the time ofsetting of a masonry mortar.3.1.7 water repellent,nadmixture used to decrease therate of water absorption of the hardened masonry mortar.3.1.8 workability enhancer,nadmixture used in a masonrymortar to increase the ease of being worked and used.3.1.8.1 DiscussionWorkability is a combination of severalproperties,including:plasticity,consistency,cohesion,adhesion,water retentivity,setting characteristics,and itscap
