1、Designation: C1064/C1064M 17Standard 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 o
2、f 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 U.S. Department of Defense.1. Scope*1.1 This test method covers the d
3、etermination 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. Combi
4、ning 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.
5、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, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use
6、.(WarningFresh hydraulic cementitious mixtures are causticand may cause chemical burns to skin and tissue uponprolonged exposure.2)1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for
7、 theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3C125 Terminology Relating to Concrete and Concrete Ag-gregatesC172/C172M Practice for Sampling Freshly
8、Mixed Con-creteC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction Materials3. Terminology3.1 For definitions of the terms used in this test method,refer to Terminology C125.4. Significance and Use4.1 This test method provides a means for measuring thetemperatu
9、re 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.4.2 Concre
10、te 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)5. Apparatus5.1 Container, shall be large enough to provide at least 75mm 3 in. of concrete in all directions around
11、the sensor of thetemperature measuring device; concrete cover must also be atleast three times the nominal maximum size of the coarseaggregate.5.2 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
12、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.5.3 Partial immersion liquid-in-glass thermometers (andpossibly other types) shall have a permanent mark to which thedevice must be immersed without applying
13、 a correction factor.1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.60 on Testing Fresh Concrete.Current edition approved Oct. 1, 2017. Published October 2017. Originallyapproved in 1986. Last p
14、revious edition approved in 2012 as C1064/C1064M12.DOI: 10.1520/C1064_C1064M-17.2Section 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 s
15、erviceastm.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 e
16、nd 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 recognized principles on standardization established in the Decision on Principles for theD
17、evelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.15.4 Reference Temperature Measuring Device, shall bereadable and accurate to 6 0.2 C 0.5 F at the verificationpoints in 6.1. A certificate or report t
18、hat 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 performed atleast every twelve months. The c
19、ertificate or report shallprovide documentation that the reference standard used in theverification is traceable to the National Institute of Standardsand Technology (NIST).6. Verification of the Accuracy of TemperatureMeasuring Devices6.1 The accuracy of each temperature measuring deviceused for de
20、termining the temperature of freshly mixed concreteshall be verified at least annually, or whenever there is aquestion of accuracy. Verify the accuracy of the temperaturemeasuring device by comparing the readings of the referencetemperature measuring device to the temperature measuringdevice at two
21、temperatures at least 15 C 30 F apart.6.2 Verification of the accuracy of the temperature measur-ing devices may be made in oil or other suitable bath liquidshaving uniform density if provision is made to:6.2.1 Maintain the bath temperature constant within 0.2 C0.5 F during the verification process.
22、6.2.2 Continuously circulate the bath liquid to provide auniform temperature throughout the bath.6.2.3 Suspend the temperature measuring devices in such amanner that the devices are not contacting the sides or bottomof the bath container during verification.6.3 Place both the temperature and referen
23、ce temperaturemeasuring devices in the bath for at least 5 min before readingtemperatures at the test points specified in 6.1.6.4 Prior to reading the temperature measuring devices, ifthe temperature in the bath has been reduced, slightly tapthermometers containing liquid to avoid adhesion of the li
24、quidto the glass.6.5 Read and record the temperature of both the referencetemperature measuring device and the temperature measuringdevice. Reject the temperature measuring device if the differ-ence in readings exceeds 0.5 C 1 F at either test point. If theindicator of the rejected temperature measu
25、ring device isadjustable, reverification is permitted after adjustment. Inaddition to the temperature readings, record the identificationnumbers of both devices used, the date verified, and the nameof individual performing the verification.7. Sampling Concrete7.1 It is acceptable to measure the temp
26、erature of freshlymixed concrete in either the transporting equipment or theforms after discharge provided the sensor of the temperaturemeasuring device has at least 75 mm 3 in. of concrete coverin all directions.7.2 If the transporting equipment or placement forms are notused as the container, a sa
27、mple shall be prepared as follows:7.2.1 Immediately, prior to sampling the freshly mixedconcrete, dampen (with water) the sample container.7.2.2 Sample the freshly mixed concrete in accordance withPractice C172/C172M, except that composite samples are notrequired if the only purpose for obtaining th
28、e sample is todetermine temperature.7.2.3 Place the freshly mixed concrete into the container.8. Procedure8.1 Position the temperature measuring device so that theend of the temperature sensing portion is submerged a mini-mum of 75 mm 3 in. into the freshly mixed concrete. Closethe void left by the
29、placement by gently pressing the concretearound the temperature measuring device at the surface of theconcrete to prevent ambient air temperature from affecting thereading.8.2 Leave the temperature measuring device in the freshlymixed concrete for at least 2 min but not more than 5 min, thenread and
30、 record the temperature to the nearest 0.5 C 1 F. Donot remove the device from the concrete when reading thetemperature.9. Report9.1 Report the measured temperature of the freshly mixedconcrete to the nearest 0.5 C 1 F.10. Precision and Bias10.1 The data used to develop the precision statement wereo
31、btained using the inch-pound version of this test method. Theprecision indices shown in SI units are conversions of thevalues in brackets.10.2 The single operator standard deviation for measure-ment of concrete temperature has been found to be 0.3 C 0.5F.5Therefore, results of two properly conducted
32、 tests by thesame operator on the same sample of material should not differby more than 0.7 C 1.3 F.510.3 The multi-operator standard deviation for the measure-ment of concrete temperature on the same sample has beenfound to be 0.4 C 0.7 F.5Therefore, two tests properlyconducted by different operato
33、rs but on the same materialshould not differ by more than 1.1 C 1.9 F.510.4 The precision values given were derived from aninter-laboratory study using 11 operators on two concretebatches at around 24 C 75 F.610.5 Since there is no accepted reference material suitablefor determining the bias of this
34、 test method, no statement onbias is being made.11. Keywords11.1 freshly mixed concrete; temperature; temperature mea-suring device5These numbers represent, respectively, the (1s) and (d2s) limits as described inPractice C670.6Supporting data have been filed at ASTM International Headquarters and ma
35、ybe obtained by requesting Research Report RR:C09-1028.C1064/C1064M 172SUMMARY OF CHANGESCommittee C09 has identified the location of selected changes to this specification since the last issue,C1064/C1064M12, that may impact the use of this specification. (Approved October 1, 2017)(1) Added Termino
36、logy (Section 3).(2) Revised 5.4 to add the wording “at least.”(3) Revised 6.1 to add the wording “at least.”ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised
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