ASTM C10-2007 Standard Specification for Natural Cement《天然水泥的标准规范》.pdf

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1、Designation: C 10 07Standard Specification forNatural Cement1This standard is issued under the fixed designation C 10; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last revision. A number in parentheses indicates the

2、 year of last reapproval. A superscriptepsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers natural cement.NOTE 1Examples of typical past uses of natural cement include unitmasonry mortar, cement plaster, grout, whitewash, and concret

3、e.1.2 For properties where values are given in both SI andnon-SI units, the values in SI units are to be regarded as thestandard. Values in SI units shall be obtained by measurementin SI units or by appropriate conversion, using the Rules forConversion and Rounding given in IEEE/ASTM SI 10,ofmeasure

4、ments made in other units.1.3 The text of this standard references notes and footnoteswhich provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be consideredas requirements of the standard.2. Referenced Documents2.1 ASTM Standards:2C 109/C 109M Te

5、st Method for Compressive Strength ofHydraulic Cement Mortars (Using 2-in. or 50-mm CubeSpecimens)C114 Test Methods for Chemical Analysis of HydraulicCementC 150 Specification for Portland CementC 151 Test Method for Autoclave Expansion of HydraulicCementC 183 Practice for Sampling and the Amount of

6、 Testing ofHydraulic CementC 185 Test Method for Air Content of Hydraulic CementMortarC 187 Test Method for Normal Consistency of HydraulicCementC 188 Test Method for Density of Hydraulic CementC 191 Test Methods for Time of Setting of HydraulicCement by Vicat NeedleC 204 Test Methods for Fineness o

7、f Hydraulic Cement byAir-Permeability ApparatusC 219 Terminology Relating to Hydraulic CementC 305 Practice for Mechanical Mixing of Hydraulic CementPastes and Mortars of Plastic ConsistencyC 465 Specification for Processing Additions for Use in theManufacture of Hydraulic CementsC 778 Specification

8、 for Standard SandC 786 Test Method for Fineness of Hydraulic Cement andRaw Materials by the 300-m (No. 50), 150-m (No. 100),and 75-m (No. 200) Sieves by Wet MethodsIEEE/ASTM SI 10 Standard for Use of the InternationalSystem of Units (SI): The Modern Metric System3. Terminology3.1 For definitions of

9、 terms related to this specification, seeTerminology C 219.4. Ordering Information4.1 Orders for material under this specification shall includethe following:4.1.1 This specification number and date, and4.1.2 Optional physical requirements as given in 7.2.5. Additions5.1 The cement covered by this s

10、pecification shall containno addition except as follows:5.1.1 Water, or calcium sulfate, or both.5.1.2 Processing additions used in the manufacture of thecement shall have been shown to meet the requirements ofSpecification C 465 in the amounts used or greater.6. Chemical Requirements6.1 Natural cem

11、ents shall conform to the standard chemicalrequirements in Table 1.7. Physical Requirements7.1 Natural cements shall conform to the respective stan-dard physical requirements prescribed in Table 1.7.2 In order to match historic cements, at the option of thepurchaser, the required values for % retent

12、ion on the 300-m(N0. 50), 150-m (No. 100), and 75-m (No. 200) sieves, or ofair permeability fineness shall be agreed at time of placing theorder.1This test method is under the jurisdiction of ASTM Committee C01 on Cementand is the direct responsibility of Subcommittee C01.10 on Hydraulic Cements for

13、General Concrete Construction.Current edition approved Dec. 1, 2007. Published December 2007. Originallyapproved in 1904. Last previous edition approved in 2006 as C 10 06.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For An

14、nual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.NOTE 2If

15、 no data on historic cement fineness are available, thepurchaser may wish to consider that previous editions of this specificationfrom 1904 to 1976 required minimum values as follows:1954-1976: Minimum 550 m2/kg fineness (air-permeabilitymethod)1937-1954: Maximum 15% retained on a 75-m (No. 200)siev

16、e1904-1937: Maximum 10% retained on a 150-m (No.100) sieve, maximum 30 % retained on a 75-m (No. 200) sieve8. Acceptance and Rejection8.1 Natural cement meets the strength requirements of thisstandard if the 7-day strength exceeds the minimum in Table 1.The cement also meets the strength requirement

17、s of thisstandard if the cement fails the 7-day strength minimum, butexceeds the 28-day strength minimum in Table 1.8.2 If the cement fails an initial test for autoclave expansion,it meets the requirements of this standard if it passes on asecond and third series of test specimens.8.3 The cement sha

18、ll be rejected if it fails to meet any of therequirements of this specification, subject to the provisions of8.1 and 8.2.8.4 Re-test cement remaining in storage for a period longerthan six months after initial test. Reject it if it fails to meet anyof the requirements of this specification at that t

19、ime.8.5 Tentative or provisional acceptance of the cement shallnot deprive the purchaser of the right of rejection in the eventfinal tests or retests fail to meet applicable requirements.8.6 At the option of the purchaser, packages more than 2 %below the mass marked thereon shall be rejected and if

20、theaverage mass of packages in any shipment, as shown bydetermining the mass of 50 packages selected at random, is lessthan that marked on the packages, the entire shipment shall berejected.9. Packaging and Package Marking9.1 When the cement is delivered in packages, the words“Natural Cement,” the n

21、ame and brand of the manufacturer,and the mass of the cement contained therein, shall be plainlyindicated on each package. Similar information shall be pro-vided in the shipping documents accompanying the shipmentof packaged or bulk cement. All packages shall be in goodcondition at the time of inspe

22、ction.10. Test Methods10.1 Sample the cement and determine the properties enu-merated in this specification in accordance with the followingASTM methods:10.1.1 SamplingPractice C 183.10.1.2 Chemical AnalysisTest Methods C114.10.1.3 FinenessOne of the following test methods shallbe used:10.1.3.1 Test

23、 Method C 204. In this fineness determination,the specific gravity of natural cement shall be considered to be2.90. Tests shall be made at a porosity of 0.530 6 0.005. Incase of dispute, the true specific gravity used shall be asdetermined in accordance with Test Method C 188.10.1.3.2 Test Method C

24、786.10.1.4 Autoclave ExpansionTest Method C 151 with thefollowing modification:10.1.4.1 The cement used in preparing the test specimensshall be a blend of 75 weight percent of the natural cement tobe tested with 25 weight percent of portland cement conform-ing to the requirements of Type II cement i

25、n SpecificationC 150.10.1.4.2 The natural cement and the portland cement shallbe dry mixed to a uniform blend before water is added.10.1.5 Time of SettingTest Method C 191.10.1.6 Air Content of MortarTest Method C 185. In thisair content determination, the specific gravity of natural cementshall be

26、considered to be 2.90. In case of dispute, the truespecific gravity used shall be as determined in accordance withTest Method C 188.10.1.7 Compressive StrengthThe compressive strengthshall be determined for mortar cubes prepared as follows:TABLE 1 Standard RequirementsApplicable Test Methods Require

27、mentsChemical RequirementsLoss on ignition, max, %: C114 12Insoluble residue, min, %: C114 2Sulfur trioxide (SO3), max, %: C114 3.0Physical RequirementsAutoclave length change, max, %: C 151, as modified in 10.1.4 0.80Fineness, m2/kg or % retained: C 204 or C 786ATime of setting, Vicat testB: C 191T

28、ime in minutes, not less than 30Air content of mortarC, volume %: C 185max 12Compressive strength, min, MPa (psi): C 109/C 109M, as modified in 10.1.77 days 3.5 (510)28 days 7.0 (1020)AThe fineness shall be chosen at the option of the purchaser as per 7.2.BThe time of setting is that described as in

29、itial setting time in Test Method C 191.CCompliance with the requirements of this specification does not necessarily ensure that the desired air content will be obtained in concrete.C1007210.1.7.1 The proportions shall be one part of cement to onepart of standard sand by mass. The amount of mixing w

30、ater isbased on the amount of water required to produce a neatcement paste of normal consistency from the same sample ofcement according to Test Method C 187. Calculate the percent-age of water required as follows:y 5P31 6.5where:y = water required for the mortar as a percentage of thecombined mass

31、of cement and sand, andP = water needed for normal consistency, percent by massof cement.10.1.7.2 The standard sand shall be 20-30 sand conformingto Specification C 778.10.1.7.3 The mortar shall be mixed in accordance withPractice C 305. The quantities of materials to be mixed at onetime in the batc

32、h of mortar for making six and nine testspecimens shall be as follows:Number of Specimens69Cement, g 900 1335Sand, g 900 1335Water, mL 18y 26.7y10.1.7.4 The 2-in. (50-mm) cube specimens shall be moldedand tested in accordance with Test Method C 109/C 109M.11. Keywords11.1 hydraulic cement; natural c

33、ement; specificationSUMMARY OF CHANGESCommittee C01 has identified the location of selected changes to this specification since the last issue,C 10 06, that may impact the use of this specification. (Approved December 1, 2007)(1) Revised Note 1.ASTM International takes no position respecting the val

34、idity 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 such rights, are entirely their own responsibility.This standard is sub

35、ject to revision 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 Headqua

36、rters. Your comments 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 standa

37、rd is copyrighted 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).C10073