1、Designation: C1005 10C1005 17Standard Specification forReference Masses and Devices for Determining Mass andVolume for Use in the Physical Testing of HydraulicCements1This standard is issued under the fixed designation C1005; the number immediately following the designation indicates the year oforig
2、inal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope Scope*1.1 This specification covers the minimum requirements for s
3、cales, balances, reference masses, and glass graduates used in thephysical testing of hydraulic cements.1.2 Requirements for analytical reference masses and balances are not included in this specification, but are to be found in TestMethods C114. The use of restrictive terminology, classes, ranges,
4、etc. and so forth has been intentionally avoided to allow theuse of this specification by other standards-writing bodies with similar requirements for reference masses and devices fordetermining mass, if desired.1.3 These requirements are not sufficiently descriptive to be used as the sole specifica
5、tions for the purchase of reference massesor devices for determining mass without amplification.1.4 Values in SI units shall be obtained by measurement in SI units or by appropriate conversion, using the Rules for Conversionand Rounding given in IEEE/ASTM SI10, of measurement made in other units.2.
6、Referenced Documents2.1 ASTM Standards:2C114 Test Methods for Chemical Analysis of Hydraulic CementE617 Specification for Laboratory Weights and Precision Mass StandardsIEEE/ASTM SI10 Standard for Use of the International System of Units (SI): The Modern Metric System3. Terminology3.1 Definitions:3.
7、1.1 accuracy, ndegree of conformity of the indication of a device for determining mass to the true value of an applied mass.3.1.2 balance, na device for determining mass that compares a mass with standard masses.3.1.3 precision, nreproducibility of the readings of a device for determining mass when
8、a given test mass is applied.3.1.4 range of mass determination, nthe range of indications of a device from the minimum test load plus any aids orcontainers on the load-receiving elements to the maximum test load with the same aids or containers, as specified by the particularmethod of test being use
9、d.3.1.5 readability, nthe smallest fraction of a division to which the index scale of a device for determining mass can be readwith ease either by estimation or by use of a vernier.3.1.6 reference mass, na piece of material of known specified mass for use in comparing or measuring the mass of otherm
10、asses (See Note 1).3.1.6.1 DiscussionThe definition of “reference mass” was formerly incorrectly designated “weight;” weight is a force (See IEEE/ASTM SI10).1 This specification is under the jurisdiction of ASTM Committee C01 on Cement and is the direct responsibility of Subcommittee C01.95 on Coord
11、ination of Standards.Current edition approved Dec. 1, 2010March 15, 2017. Published January 2011March 2017. Originally approved in 1983. Last previous edition approved in 20052010as C1005C1005 10.05. DOI: 10.1520/C1005-10.10.1520/C1005-17.2 For referencedASTM standards, visit theASTM website, www.as
12、tm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what c
13、hanges have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the of
14、ficial document.*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 States13.1.7 scale, na device for determining mass having a load-receiving element and an index scale (possibly
15、in combination withthe use of internal masses or proportional masses), almost always calibrated to indicate mass; generally of lesser accuracy than abalance.3.1.8 sensitivity, nthe minimum change of applied mass required to perceptibly move the indicating element of a device fordetermining mass.3.1.
16、9 sensitivity requirement, nthe minimum change in position of rest of the indicating element of a device for determiningmass in response to a specified change of mass load on the load-receiving element.3.1.10 test load, nthe mass to be determined in a single determination, exclusive of aids or conta
17、iners, as specified in the testmethod being followed.3.1.11 tolerance, nprecision and accuracy criteria for reference masses or devices for determining mass.acceptance tolerancethe maximum permissible deviation from correct indication for new or newly reconditioned or adjustedreference masses or dev
18、ices for determining mass; equal to 12 the maintenance tolerance.adjustment toleranceacceptance tolerance.maintenance tolerancemaximum permissible deviation from correct indication for reference masses and devices fordetermining mass in service.3.1.12 total load, nthe sum of the masses of materials
19、and aids or containers applied to the load-receiving element at any onetime.4. Reference Masses4.1 Reference masses for use in the methods of physical testing of hydraulic cement and related and similar materials shallconform at least to the requirements of Class 6 reference masses in Specification
20、E617, except that the maintenance tolerancesgiven in Specification E617 for Class 6 reference masses are to be considered acceptance tolerances for purposes of thisspecification and the maintenance tolerances twice these values. See Table 1. (See Note 1)NOTE 1Former NBS Class P and F reference masse
21、s meet this specification as do OIML Class M1 reference masses. Former NBS Class T referencemasses of 100 mg and less, Class C reference masses of 1 kg and greater, and OIML Class M2 reference masses of 200 g and greater meet thespecification.4.2 A mass used strictly as a mass, whose actual value ne
22、ed not be known, need not meet the requirements of 4.1 (See Note2).NOTE 2A tare mass for a container used in mass determination is in this category. The actual value of its mass need not be known, but it must beequal in mass to that of the container.5. Requirements for Scales and Balances5.1 Capacit
23、yThe capacity of a device for mass determination shall be at least equal to the maximum total load to be appliedto the load-receiving element at any one time (See Note 3).TABLE 1 Tolerances for Reference MassesA,BMass, gAcceptanceTolerance,mgMaintenanceTolerance,mg10 000 1 000 2 0005 000 500 1 0003
24、000 300 6002 000 200 4001 000 100 200500 50 100300 30 60200 20 40100 10 2050 7 1430 5 1020 3 610 2 45 2 43 2 42 2 41 2 4A Values from Table 1 of Specification E617 for Class 6 metric reference masses.B Forreferencemasseswithunlistednominalvalues,thetoleranceshallbethatforthe next lower denomination
25、listed.C1005 172NOTE 3In general, the capacity of a device for mass determination should not greatly exceed twice the maximum total load required for a given testbecause of the reduced accuracy, readability, and sensitivity with higher capacity weighing devices. There are exceptions to this generali
26、ty as, for example,the high quality substitution balances.5.2 Precision and AccuracyThe maintenance tolerance for a device for mass determination shall be no greater than 0.05 %of the test load throughout the range. For balances with a capacity of 3000 g or more, the range of the test load shall be
27、300 to3000 g. For balances with a capacity of less than 3000 g, the range of the test load shall be 10 % of the capacity up to the capacityof the balance. The device for mass determination shall be capable of reproducing readings with the same test mass to within atleast the maintenance tolerance.5.
28、3 ReadabilityThe index scale of a device for mass determination shall be easily readable to 0.1 g.5.4 Sensitivity RequirementThe indicating element of the device for determination of mass shall show a change of at least oneof the smallest divisions of the index scale for a change of 0.1 % of the tes
29、t load within the range.6. Requirements for Glass Graduates6.1 Glass Graduates, of suitable capacities (large enough to measure the mixing water for paste and mortar mixtures in a singleoperation) shall be made to deliver the indicated volume at 20C (68F).6.1.1 The permissible variation for graduate
30、s of 100 to 150-mL capacities shall be 61.0 mL, for graduates of 200 to 300-mLcapacities 62.0 mL, and for all larger graduates 60.5 % of the rated capacity.6.1.2 These graduates shall be subdivided to at least 5 mL with the following exceptions:6.1.2.1 The graduation lines may be omitted for the low
31、est 15 mL for a 150-mL graduate,6.1.2.2 The graduation lines may be omitted for the lowest 25 mL for a 250-mL graduate, and6.1.2.3 The graduation lines may be omitted for the lowest 50 mL for a 500-mL graduate.6.1.3 The main graduation lines shall extend at least three quarters of the way around the
32、 graduate and shall be numbered (Note4).NOTE 4Some graduates are manufactured with two numbering systems; one on each side of the main graduation lines. In reading from bottom totop, one system is increasing while on the other side the numbers are decreasing. Care should be taken since this could cr
33、eate confusion in reading thevolume.7. Verification Timing7.1 New or newly reconditioned or adjusted reference masses and devices for determination of mass shall not be placed inservice if they do not meet the acceptance tolerances specified in this standard.7.2 Reference masses and devices for dete
34、rmination of mass in service shall be checked annually and shall be removed fromservice if they exceed the maintenance tolerances specified in this standard (See Note 5).NOTE 5An optional performacneperformance verification procedure is provided in Appendix X1.7.3 Record Verification RequirementMain
35、tain documentation of the reference mass verification in the laboratory. Include inthe documentation the date and the mass determination when verified.8. Keywords8.1 devices for determining mass; devices for measuring volume; glass graduate; reference massesAPPENDIX(Nonmandatory Information)X1. SCAL
36、E AND BALANCE PERFORMANCE VERIFICATIONX1.1 This check mass verification procedure may be used to verify the continuing precise performance of a scale or balance.Perform this procedure in addition to the annual verification procedure.X1.1.1 The verification check mass shall be made of corrosion-resis
37、ting material (for example, material conforming toSpecification E617 Class 6 masses) and shall have a stable mass. The check mass used for this purpose need not conform to anytolerance.X1.1.2 The check mass must satisfy the size requirements for the reference test mass as described in the “Precision
38、 andAccuracy”paragraph (5.2).X1.1.3 Dedicate the check mass to the verification process to prevent any alternate uses from damaging or altering the mass.C1005 173X1.1.4 Make one mass determination using a single check mass on the selected scale or balance.X1.1.5 Maintain documentation of this verifi
39、cation in the laboratory. Include in the documentation the date and the massdetermination when verified. If the difference between the current reading and the previous reading exceeds the maintenancetolerance of the similar sized reference mass as listed in Table 1, test the balance or scale for con
40、formance to this standard withreference masses and adjust or replace the scale or balance as appropriate.X1.1.6 In the event of an adjustment or replacement, establish a new check mass determination value for the verification and makeno comparison until the next scheduled verification.X1.1.7 Perform
41、 this procedure routinely and whenever scale or balance performance verification is desired.SUMMARY OF CHANGESCommittee C01 has identified the location of selected changes to this standard since the last issue(C1005 10) that may impact the use of this standard. (Approved March 15, 2017.)(1) Added ne
42、w Subsection 7.3.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 that determination of the validity of any such patent rights, and the riskof infringement of
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46、he aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 174
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