1、Designation:C27014aStandard Specification forMortar for Unit Masonry1This standard is issued under the fixed designation C270;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 indicates
2、 the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This specification covers mortars for use in the construc-tion of non-reinforced and
3、reinforced unit masonry structures.Four types of mortar are covered in each of two alternativespecifications:(1)proportion specifications and(2)propertyspecifications.NOTE1When the property specification is used to qualify masonrymortars,the testing agency performing the test methods should beevalua
4、ted in accordance with Practice C1093.1.2 The proportion or property specifications shall govern asspecified.1.3 When neither proportion or property specifications arespecified,the proportion specifications shall govern,unlessdata are presented to and accepted by the specifier to show thatmortar mee
5、ts the requirements of the property specifications.1.4 This standard is not a specification to determine mortarstrengths through field testing(see Section 3).1.5 The text of this specification references notes andfootnotes which provide explanatory material.These notes andfootnotes(excluding those i
6、n tables and figures)shall not beconsidered as requirements of the standard.1.6 The terms used in this specification are identified inTerminologies C1180 and C1232.1.7 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to S
7、I units that are provided for information onlyand are not considered standard.1.8 The following safety hazards caveat pertains only to thetest methods section of this specification:This standard doesnot purport to address all of the safety concerns,if any,associated with its use.It is the responsibi
8、lity of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2.Referenced Documents2.1 ASTM Standards:2C5 Specification for Quicklime for Structural PurposesC91 Specification for Masonry CementC109/C109M Te
9、st Method for Compressive Strength ofHydraulic Cement Mortars(Using 2-in.or 50-mm CubeSpecimens)C110 Test Methods for Physical Testing of Quicklime,Hydrated Lime,and LimestoneC128 Test Method for Density,Relative Density(SpecificGravity),and Absorption of Fine AggregateC144 Specification for Aggrega
10、te for Masonry MortarC150 Specification for Portland CementC188 Test Method for Density of Hydraulic CementC207 Specification for Hydrated Lime for Masonry Pur-posesC305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plastic ConsistencyC511 Specification for Mixing Rooms,Moi
11、st Cabinets,Moist Rooms,and Water Storage Tanks Used in theTesting of Hydraulic Cements and ConcretesC595 Specification for Blended Hydraulic CementsC780 Test Method for Preconstruction and ConstructionEvaluation of Mortars for Plain and Reinforced UnitMasonryC952 Test Method for Bond Strength of Mo
12、rtar to MasonryUnitsC979 Specification for Pigments for Integrally Colored Con-creteC1072 Test Methods for Measurement of Masonry FlexuralBond StrengthC1093 Practice for Accreditation of Testing Agencies forMasonryC1157 Performance Specification for Hydraulic CementC1180 Terminology of Mortar and Gr
13、out for Unit MasonryC1232 Terminology of MasonryC1324 Test Method for Examination and Analysis of Hard-ened Masonry Mortar1This specification is under the jurisdiction of ASTM Committee C12 onMortars and Grouts for Unit Masonryand is the direct responsibility of Subcom-mittee C12.03 on Specification
14、s for Mortars.Current edition approved Dec.15,2014.Published December 2014.Originallyapproved in 1951.Last previous edition approved in 2014 as C270 14.DOI:10.1520/C0270-14A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annu
15、al 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 C1329 Specificati
16、on for Mortar CementC1384 Specification for Admixtures for Masonry MortarsC1489 Specification for Lime Putty for Structural PurposesC1506 Test Method for Water Retention of HydraulicCement-Based Mortars and PlastersC1586 Guide for Quality Assurance of MortarsE72 Test Methods of Conducting Strength Tests of Panelsfor Building ConstructionE514 Test Method for Water Penetration and LeakageThrough MasonryE518 Test Methods for Flexural Bond Strength of Masonry2.2 Masonry Industry Council:3Hot and Col