1、Designation:C158618Standard Guide forQuality Assurance of Mortars1This standard is issued under the fixed designation C1586;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 t
2、he year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This document provides guidance regarding the properuse of Specification C270 and Test Method C780 for evaluat-ing masonry mortar produced in the laboratory and at thecons
3、truction site.1.2 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization Technic
4、alBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C144 Specification for Aggregate for Masonry MortarC270 Specification for Mortar for Unit MasonryC780 Test Method for Preconstruction and ConstructionEvaluation of Mortars for Plain and Reinforced UnitMasonry3.Significance a
5、nd Use3.1 This document is intended to provide guidance andclarification to designers,specifiers,inspectors,testingagencies,producers,and users in specifying and evaluatingmasonry mortar.3.2 Users of documents Specification C270 and TestMethod C780 often confuse and sometimes inadvertentlymisuse par
6、ts of the two documents when specifying or evalu-ating masonry mortar.This guide seeks to address specificitems within Specification C270 and Test Method C780 to helppromote their proper use and interpretation.4.Specifying Masonry Mortar4.1 Use Specification C270 to specify masonry mortar byeither t
7、he Proportion or Property Specifications of thatstandard,but not both.If neither Proportion or PropertySpecification C270 are specified,the Proportion specificationshall govern,unless data are presented to and accepted by thespecifier to show that the mortar meets the property specifica-tion require
8、ments.4.2 Proportion SpecificationsThese Specifications directthe mason to produce the masonry mortar using designatedvolumetric proportions of cementitious materials and aggregateas set forth in Table 2,Proportion Specifications,of Specifica-tion C270 for the Type of mortar specified.This procedure
9、 ofspecifying mortar requires no sampling or testing of mortar,and hence,no measurement of mortar properties in the labo-ratory or the field is required.All that is necessary is fieldconfirmation of the proper proportions of the mixes used inconstruction.4.3 Property SpecificationsThese Specificatio
10、ns requiretesting of laboratory-prepared mortar for compliance with therequirements of Table 1,Property Specifications,of Specifica-tion C270 for the Type of mortar specified.4.3.1 The Property Specifications require evaluation of amortar with a consistency(flow)of 110 6 5%.This is anarbitrarily est
11、ablished mortar consistency that is used toapproximate the water content of mortar after it is placed in amasonry assemblage with absorbent masonry units.Theamount of water required in mortar produced at the construc-tion site is normally greater than the amount used for Specifi-cation C270 Property
12、 Specifications testing.4.3.2 Do not use the Specification C270 Property Specifi-cations requirements to evaluate construction site-producedmortars.Due to the higher amount of water necessary foractual masonry construction,mortar produced and sampled inthe field will typically have lower compressive
13、 strength thanthat produced in the laboratory per Specification C270.1This guide is under the jurisdiction of ASTM Committee C12 on Mortars andGrouts for Unit Masonryand is the direct responsibility of Subcommittee C12.03 onSpecifications for Mortars.Current edition approved Dec.15,2018.Published De
14、cember 2018.Originallyapproved in 2004.Last previous edition approved in 2017 as C1586 17.DOI:10.1520/C1586-18.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standa
15、rds 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 StatesThis international standard was developed in accordance with internationally recog
16、nized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.3.3 WhenmortarisspecifiedbythePropertySpecifications,the quantities of cementitious materials andaggregates as determined through laboratory testing are con-verted to volumetric proportions to produce masonry mortar atthe construction site.5.Quality Assurance of M