ASTM_C_1064_-_C_1064M_-_12.pdf

Designation:C1064/C1064M12Standard Test Method forTemperature of Freshly Mixed Hydraulic-Cement Concrete1This standard is issued under the fixed designation C1064/C1064M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1.Scope*1.1 This test method covers the determination of tempera-ture of freshly mixed hydraulic-cement concrete.1.2 The values stated in either SI or inch-pound units are tobe regarded separately as standard.The values stated in eachsystem may not be exact equivalents;therefore,each systemshall be used independently of the other.Combining valuesfrom the two systems may result in non-conformance with thestandard.1.3 The text of this standard references notes and footnotesthat provide explanatory information.These notes and foot-notes(excluding those in tables and figures)shall not beconsidered as requirements of this standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.(WarningFreshhydraulic cementitious mixtures are caustic and may causechemical burns to skin and tissue upon prolonged exposure.2)2.Referenced Documents2.1 ASTM Standards:3C172 Practice for Sampling Freshly Mixed ConcreteC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction Materials3.Significance and Use3.1 This test method provides a means for measuring thetemperature of freshly mixed concrete.The measured tempera-ture represents the temperature at the time of testing and maynot be an indication of the temperature of the freshly mixedconcrete at a later time.It may be used to verify conformanceto a specified requirement for temperature of concrete.3.2 Concrete containing aggregate of a nominal maximumsize greater than 75 mm 3 in.may require up to 20 min for thetransfer of heat from aggregate to mortar.(See ACI Committee207.1R Report.4)4.Apparatus4.1 Container,shall be large enough to provide at least 75mm 3 in.of concrete in all directions around the sensor of thetemperature measuring device;concrete cover must also be atleast three times the nominal maximum size of the coarseaggregate.4.2 Temperature Measuring Device,shall be capable ofaccurately measuring the temperature of the freshly mixedconcrete to 6 0.5 C 61 F throughout a range of 0 to 50 C30 to 120 F.The design of the temperature measuringdevice shall be such that it allows 75 mm 3 in.or moreimmersion during operation.4.3 Partial immersion liquid-in-glass thermometers(andpossibly other types)shall have a permanent mark to which thedevice must be immersed without applying a correction factor.4.4 Reference Temperature Measuring Device,shall bereadable and accurate to 6 0.2 C 0.5 F at the verificationpoints in 5.1.A certificate or report that verifies the accuracyshall be available in the laboratory for review.Accuracy ofliquid-in-glass reference temperature measuring devices shallbe verified once.Verification of direct-reading resistance ref-erence temperature measuring devices shall be performedevery twelve months.The certificate or report shall providedocumentation that the reference standard used in the verifi-cation is traceable to the National Institute of Standards andTechnology(NIST).1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregatesand is the direct responsibility of SubcommitteeC09.60 on Testing Fresh Concrete.Current edition approved Dec.1,2012.Published January 2013.Originallyapproved in 1986.Last previous edition approved in 2011 as C106411.DOI:10.1520/C1064_C1064M-12.2Section on Safety Precautions,Manual of Aggregate and Concrete Testing,Annual Book of ASTM Standards,Vol 04.02.3For 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 standards Document Summary page onthe ASTM website.4Available from American Concrete Institute(ACI),P.O.Box 9094,FarmingtonHills,MI 48333-9094,http:/www.concrete.org.*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 5.Verification of the Accuracy of TemperatureMeasuring Devices5.1 The accuracy of each temperature measuring deviceused for determining the temperature of freshly mixed concreteshall be verified annually,or whenever there is a question ofaccuracy.Verify the accuracy of the temperature measuringdevice by comparing the readings of the