1、Designation: C 1005 05Standard Specification forReference Masses and Devices for Determining Mass andVolume for Use in the Physical Testing of HydraulicCements1This standard is issued under the fixed designation C 1005; the number immediately following the designation indicates the year oforiginal a
2、doption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the minimum requirements forscales, balanc
3、es, 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, etc. has been
4、 intentionally avoided to allow theuse of this specification by other standards-writing bodies withsimilar requirements for reference masses and devices fordetermining mass, if desired.1.3 These requirements are not sufficiently descriptive to beused as the sole specifications for the purchase of re
5、ferencemasses 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.2. Referenced Documents2.1 ASTM St
6、andards:2C114 Test Methods for Chemical Analysis of HydraulicCementE 617 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 accuracy, ndegree of conformi
7、ty of the indicationof a 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 test mass is applied.3.1.4
8、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 readability, nthe smallest
9、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 (See Note 1).3.1.6.1 Discussion
10、The 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 proportional masses),almost
11、 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 inposition of rest of the indic
12、ating element of a device fordetermining mass in response to a specified change of massload on the load-receiving element.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
13、 and accuracy criteria forreference masses or devices for determining mass.acceptance tolerancethe maximum permissible deviationfrom correct indication for new or newly reconditioned oradjusted reference masses or devices for determining mass;equal to12 the maintenance tolerance.adjustment tolerance
14、acceptance tolerance.maintenance tolerancemaximum permissible deviation1This 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 July 1, 2005. Published August 2005. Origin
15、allyapproved in 1983. Last previous edition approved in 2000 as C 1005 00.2For 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 onthe
16、ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.from correct indication for reference masses and devices fordetermining mass in service.3.1.12 total load, nthe sum of the masses of materials andaids or containers applied
17、 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 materialsshall conform at least to the requirements of Class 6 referencemasses in Specification E 617, except that the maintenan
18、cetolerances given in Specification E 617 for Class 6 referencemasses are to be considered acceptance tolerances for purposesof this specification and the maintenance tolerances twice thesevalues. See Table 1. (See Note 1)NOTE 1Former NBS Class P and F reference masses meet thisspecification as do O
19、IML 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 and greatermeet the specification.4.2 A mass used strictly as a mass, whose actual value neednot be known, need not meet the
20、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 equal in mass to that of the container.5. Requirements for Scales and Balances Requirements forScales and Balances5.1 Capacit
21、yThe 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 device for mass determinationshould not greatly exceed twice the maximum total load required
22、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.5.2 Precision and AccuracyThe maintenance tolerancefor a device for mass determination sh
23、all be no greater than0.05 % of the test load throughout the range. For balances witha capacity of 3000 g or more, the range of the test load shall be300 to 3000 g. For balances with a capacity of less than 3000g, the range of the test load shall be 10 % of the capacity up tothe capacity of the bala
24、nce. 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 massdetermination shall be easily readable to 0.1 g.5.4 Sensitivity RequirementThe indicating element of t
25、hedevice 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 Glass Graduates, of suitable capacities (large enough tomeasure the mixing water for paste
26、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 200 to300-mL capacities 62.0 mL, and for all larger graduates60.5 % of the rated capacity.6.
27、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 omitted for the lowest25 mL for a 250-mL graduate, and6.1.2.3 The graduation lines may be om
28、itted for the lowest50 mL for a 500-mL graduate.6.1.3 The main graduation lines shall extend at least threequarters of the way around the graduate and shall be numbered(Note 4).NOTE 4Some graduates are manufactured with two numbering sys-tems; one on each side of the main graduation lines. In readin
29、g frombottom to top, one system is increasing while on the other side thenumbers are decreasing. Care should be taken since this could createconfusion in reading the volume.7. Rejection7.1 New or newly reconditioned or adjusted referencemasses and devices for determination of mass shall not beplaced
30、 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 standard.8. Keywords8.1 devic
31、es for determining mass; devices for measuringvolume; glass graduate; reference massesTABLE 1 Tolerances for Reference MassesA,BMass, gAcceptanceTolerance,6mgMaintenanceTolerance,6mg10 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
32、 5 1020 3 610 2 4523222412AValues from Table 1 of Specification E 617 for Class 6 metric referencemasses.BFor reference masses with unlisted nominal values, the tolerance shall be thatfor the next lower denomination listed.C1005052ASTM International takes no position respecting the validity of any p
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34、on at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your co
35、mments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrigh
36、ted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).C1005053
