1、Designation: C1005 18Standard 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 oforiginal ado
2、ption 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*1.1 This specification covers the minimum requirements forscales, balances
3、, reference masses, and glass graduates used inthe physical testing of hydraulic cements.1.2 Requirements for analytical reference masses and bal-ances are not included in this specification, but are to be foundin Test Methods C114. The use of restrictive terminology,classes, ranges, and so forth ha
4、s been intentionally avoided toallow the use of this specification by other standards-writingbodies with similar requirements for reference masses anddevices for determining mass, if desired.1.3 These requirements are not sufficiently descriptive to beused as the sole specifications for the purchase
5、 of referencemasses or devices for determining mass without amplification.1.4 Values in SI units shall be obtained by measurement inSI units or by appropriate conversion, using the Rules forConversion and Rounding given in IEEE/ASTM SI10,ofmeasurement made in other units.1.5 This international stand
6、ard 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 TechnicalBarriers to Trade (TBT) Committee.2. Re
7、ferenced Documents2.1 ASTM Standards:2C114 Test Methods for Chemical Analysis of HydraulicCementE617 Specification for Laboratory Weights and PrecisionMass StandardsIEEE/ASTM SI10 Standard for Use of the InternationalSystem of Units (SI): The Modern Metric System3. Terminology3.1 Definitions:3.1.1 a
8、ccuracy, ndegree of conformity of the indication ofa device for determining mass to the true value of an appliedmass.3.1.2 balance, na device for determining mass that com-pares a mass with standard masses.3.1.3 precision, nreproducibility of the readings of adevice for determining mass when a given
9、 test mass is applied.3.1.4 range of mass determination, nthe range of indica-tions of a device from the minimum test load plus any aids orcontainers on the load-receiving elements to the maximum testload with the same aids or containers, as specified by theparticular method of test being used.3.1.5
10、 readability, nthe smallest fraction of a division towhich the index scale of a device for determining mass can beread with ease either by estimation or by use of a vernier.3.1.6 reference mass, na piece of material of knownspecified mass for use in comparing or measuring the mass ofother masses (se
11、e Note 1).3.1.6.1 DiscussionThe definition of “reference mass” wasformerly incorrectly designated “weight;” weight is a force(see IEEE/ASTM SI10).3.1.7 scale, na device for determining mass having aload-receiving element and an index scale (possibly in combi-nation with the use of internal masses or
12、 proportional masses),almost always calibrated to indicate mass; generally of lesseraccuracy than a balance.3.1.8 sensitivity, nthe minimum change of applied massrequired to perceptibly move the indicating element of a devicefor determining mass.3.1.9 sensitivity requirement, nthe minimum change inp
13、osition of rest of the indicating element of a device for1This specification is under the jurisdiction of ASTM Committee C01 onCement and is the direct responsibility of Subcommittee C01.95 on Coordination ofStandards.Current edition approved May 1, 2018. Published June 2018. Originallyapproved in 1
14、983. Last previous edition approved in 2017 as C1005 17. DOI:10.1520/C1005-18.2For 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 standards Document Summary page on
15、the 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 recognized principles on sta
16、ndardization 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.1determining mass in response to a specified change of massload on the load-receiving el
17、ement.3.1.10 test load, nthe mass to be determined in a singledetermination, exclusive of aids or containers, as specified inthe test method being followed.3.1.11 tolerance, nprecision and accuracy criteria forreference masses or devices for determining mass.acceptance tolerancethe maximum permissib
18、le deviationfrom correct indication for new or newly reconditioned oradjusted reference masses or devices for determining mass;equal to12 the maintenance tolerance.adjustment toleranceacceptance tolerance.maintenance tolerancemaximum permissible deviationfrom correct indication for reference masses
19、and devices fordetermining mass in service.3.1.12 total load, nthe sum of the masses of materials andaids or containers applied to the load-receiving element at anyone time.4. Reference Masses4.1 Reference masses for use in the methods of physicaltesting of hydraulic cement and related and similar m
20、aterialsshall conform at least to the requirements of Class 6 referencemasses in Specification E617, except that the maintenancetolerances given in Specification E617 for Class 6 referencemasses are to be considered acceptance tolerances for purposesof this specification and the maintenance toleranc
21、es twice thesevalues. See Table 1. (See Note 1.)NOTE 1Former NBS Class P and F reference masses meet thisspecification as do OIML Class M1 reference masses. Former NBS ClassT reference masses of 100 mg and less, Class C reference masses of 1 kgand greater, and OIML Class M2 reference masses of 200 g
22、 and greatermeet the specification.4.2 A mass used strictly as a mass, whose actual value neednot be known, need not meet the requirements of 4.1 (see Note2).NOTE 2A tare mass for a container used in mass determination is inthis category. The actual value of its mass need not be known, but it mustbe
23、 equal in mass to that of the container.5. Requirements for Scales and Balances5.1 CapacityThe capacity of a device for mass determi-nation shall be at least equal to the maximum total load to beapplied to the load-receiving element at any one time (see Note3).NOTE 3In general, the capacity of a dev
24、ice for mass determinationshould not greatly exceed twice the maximum total load required for agiven test because of the reduced accuracy, readability, and sensitivitywith higher capacity weighing devices. There are exceptions to thisgenerality as, for example, the high quality substitution balances
25、.5.2 Precision and AccuracyThe maintenance tolerance fora device for mass determination shall be no greater than 0.05 %of the test load throughout the range. For balances with acapacity of 3000 g or more, the range of the test load shall be300 to 3000 g. For balances with a capacity of less than 300
26、0g, the range of the test load shall be 10 % of the capacity up tothe capacity of the balance. The device for mass determinationshall be capable of reproducing readings with the same testmass to within at least the maintenance tolerance.5.3 ReadabilityThe index scale of a device for massdeterminatio
27、n shall be easily readable to 0.1 g.5.4 Sensitivity RequirementThe indicating element of thedevice for determination of mass shall show a change of atleast one of the smallest divisions of the index scale for achange of 0.1 % of the test load within the range.6. Requirements for Glass Graduates6.1 G
28、lass Graduates, of suitable capacities (large enough tomeasure the mixing water for paste and mortar mixtures in asingle operation) shall be made to deliver the indicated volumeat 20C (68F).6.1.1 The permissible variation for graduates of 100 to150-mL capacities shall be 61.0 mL, for graduates of 20
29、0 to300-mL capacities 62.0 mL, and for all larger graduates60.5 % of the rated capacity.6.1.2 These graduates shall be subdivided to at least 5 mLwith the following exceptions:6.1.2.1 The graduation lines may be omitted for the lowest15 mL for a 150-mL graduate,6.1.2.2 The graduation lines may be om
30、itted for the lowest20 mL for a 200-mL graduate,6.1.2.3 The graduation lines may be omitted for the lowest25 mL for a 250-mL graduate, and6.1.2.4 The graduation lines may be omitted for the lowest50 mL for a 500-mL graduate.6.1.3 The main graduation lines shall extend at least threequarters of the w
31、ay around the graduate and shall be numbered(Note 4).NOTE 4Some graduates are manufactured with two numberingsystems; one on each side of the main graduation lines. In reading frombottom to top, one system is increasing while on the other side theTABLE 1 Tolerances for Reference MassesA,BMass, gAcce
32、ptanceTolerance,mgMaintenanceTolerance,mg10 000 1 000 2 0005 000 500 1 0003 000 300 6002 000 200 4001 000 100 200500 50 100300 30 60200 20 40100 10 2050 7 1430 5 1020 3 610 2 4523222412AValues from Table 1 of Specification E617 for Class 6 metric reference masses.BFor reference masses with unlisted
33、nominal values, the tolerance shall be that forthe next lower denomination listed.C1005 182numbers are decreasing. Care should be taken since this could createconfusion in reading the volume.7. Verification Timing7.1 New or newly reconditioned or adjusted referencemasses and devices for determinatio
34、n of mass shall not beplaced in service if they do not meet the acceptance tolerancesspecified in this standard.7.2 Reference masses and devices for determination of massin service shall be checked annually and shall be removed fromservice if they exceed the maintenance tolerances specified inthis s
35、tandard (see Note 5).NOTE 5An optional performance verification procedure is provided inAppendix X1.7.3 Record Verification RequirementMaintain documenta-tion of the reference mass verification in the laboratory. Includein the documentation the date and the mass determination whenverified.8. Keyword
36、s8.1 devices for determining mass; devices for measuringvolume; glass graduate; reference massesAPPENDIX(Nonmandatory Information)X1. SCALE AND BALANCE PERFORMANCE VERIFICATIONX1.1 This check mass verification procedure may be used toverify the continuing precise performance of a scale or balance.Pe
37、rform this procedure in addition to the annual verificationprocedure.X1.1.1 The verification check mass shall be made ofcorrosion-resisting material (for example, material conformingto Specification E617 Class 6 masses) and shall have a stablemass. The check mass used for this purpose need not confo
38、rmto any tolerance.X1.1.2 The check mass must satisfy the size requirementsfor the reference test mass as described in the “Precision andAccuracy” paragraph (5.2).X1.1.3 Dedicate the check mass to the verification processto prevent any alternate uses from damaging or altering themass.X1.1.4 Make one
39、 mass determination using a single checkmass on the selected scale or balance.X1.1.5 Maintain documentation of this verification in thelaboratory. Include in the documentation the date and the massdetermination when verified. If the difference between thecurrent reading and the previous reading exce
40、eds the mainte-nance tolerance of the similar sized reference mass as listed inTable 1, test the balance or scale for conformance to thisstandard with reference masses and adjust or replace the scaleor balance as appropriate.X1.1.6 In the event of an adjustment or replacement, estab-lish a new check
41、 mass determination value for the verificationand make no comparison until the next scheduled verification.X1.1.7 Perform this procedure routinely and whenever scaleor balance performance verification is desired.SUMMARY OF CHANGESCommittee C01 has identified the location of selected changes to this
42、standard since the last issue(C1005 17) that may impact the use of this standard. (Approved May 1, 2018.)(1) Added new Subsection 6.1.2.2 and renumbered subsequentsections accordingly.Committee C01 has identified the location of selected changes to this standard since the last issue(C1005 10) that m
43、ay impact the use of this standard. (Approved March 15, 2017.)(1) Added new Subsection 7.3.C1005 183ASTM 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 dete
44、rmination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or
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