1、Designation:C59618Standard Test Method forDrying Shrinkage of Mortar Containing Hydraulic Cement1This standard is issued under the fixed designation C596;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A num
2、ber in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method determines the change in length ondrying of mortar bars containing hydraulic cement and gradedstandard sand.1.2 The values s
3、tated in SI units are to be regarded asstandard.When combined standards are referenced,the selec-tion of measurement system is at the users discretion subjectto the requirements of the referenced standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with
4、its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.WarningFresh hydraulic cementitious mixtures are causticand may cause chemical burns to skin and ti
5、ssue uponprolonged exposure).21.4 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 Orga
6、nization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3C157/C157M Test Method for Length Change of HardenedHydraulic-Cement Mortar and ConcreteC219 Terminology Relating to Hydraulic CementC305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars o
7、f Plastic ConsistencyC490/C490M Practice for Use of Apparatus for the Deter-mination of Length Change of Hardened Cement Paste,Mortar,and ConcreteC511 Specification for Mixing Rooms,Moist Cabinets,Moist Rooms,and Water Storage Tanks Used in theTesting of Hydraulic Cements and ConcretesC670 Practice
8、for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC778 Specification for Standard SandC1005 Specification for Reference Masses and Devices forDetermining Mass and Volume for Use in the PhysicalTesting of Hydraulic CementsC1437 Test Method for Flow of Hydraulic Cem
9、ent MortarE177 Practice for Use of the Terms Precision and Bias inASTM Test Methods3.Terminology3.1 The term“drying shrinkage”is defined as the decreasein length of the test specimen,where the decrease is caused byany factor other than externally applied forces under statedconditions of temperature,
10、relative humidity and evaporationrate in the environment;the term includes the net effect of avariety of phenomena tending to bring about both increases anddecreases in length during the period in which the testspecimens under consideration are stored in the environmentand in which a number of proce
11、sses,including hydration of thecement,are taking place at a variety of rates.3.2 Other terms used in this test method are defined inTerminology C219.4.Significance and Use4.1 This test method establishes a selected set of conditionsof temperature,relative humidity and rate of evaporation of theenvir
12、onment to which a mortar specimen of stated compositionshall be subjected for a specified period of time during whichits change in length is determined and designated“dryingshrinkage”.4.2 The drying shrinkage of mortar as determined by thistest method has a linear relation to the drying shrinkage of
13、concrete made with the same cement and exposed to the same1This test method is under the jurisdiction of ASTM Committee C01 on Cementand is the direct responsibility of Subcommittee C01.31 on Volume Change.Current edition approved Dec.1,2018.Published December 2018.Originallyapproved in 1967.Last pr
14、evious edition approved in 2017 as C596 09(2017).DOI:10.1520/C0596-18.2Section on Safety,Manual of Cement Testing,Annual Book of Standards,Vol04.01.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards v
15、olume 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 StatesThis international standard was developed in
16、accordance with internationally recognized 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 drying conditions.4Hence this test method may be used whenit is desired to develop data on the effect of a hydraulic cementon the drying shrinkage of concrete made with that cement.5.Apparatus5.1 Weighing Devices and WeightsWeigh