1、Designation: C 706 02 (Reapproved 2008)1Standard Specification forLimestone for Animal Feed Use1This standard is issued under the fixed designation C 706; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、 number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTEA units statement was added editorially as paragraph 1.2 and subsequent paragraphs were renumbered in December2008.1. Scope1.1 This specifica
3、tion covers limestone supplied for use as amineral supplement in animal feeds.NOTE 1The calcium needed for animal nutrition is customarilysupplied by limestone. Such limestone must be sufficiently fine to blendwith mixed feeds and yet be free from excessive dusting.1.2 The values stated in SI units
4、are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 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 and health practic
5、es and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C25 Test Methods for Chemical Analysis of Limestone,Quicklime, and Hydrated LimeC50 Practice for Sampling, Sample Preparation, Packag-ing, and Marking of Lime and Limestone ProductsC
6、51 Terminology Relating to Lime and Limestone (as usedby the Industry)C110 Test Methods for Physical Testing of Quicklime,Hydrated Lime, and LimestoneE11 Specification for Wire Cloth and Sieves for TestingPurposes3. Terminology3.1 Definitions of terms applying to this specification appearin Terminol
7、ogy C51.4. General Requirements4.1 The product must be suitable for animal feeding.5. Chemical Requirements5.1 Limestone, as identified on feed labels, shall conform tothe chemical requirements given in Table 1.6. Physical Requirements6.1 Sieve analysis and other physical requirements shall bespecif
8、ied by the purchaser.7. Test Methods7.1 Chemical AnalysisUnless otherwise agreed upon be-tween the purchaser and the manufacturer, the chemical analy-sis of the limestone shall be conducted in accordance with TestMethods C25.7.2 Particle SizeUnless otherwise agreed upon betweenthe purchaser and the
9、manufacturer, the sieve analysis of thematerial shall be determined in accordance with Test MethodsC110.7.2.1 ProcedureIf the entire sample is not to be dried,obtain lesser portions by riffling or quartering. Dry at between115 to 120 C to a constant mass and cool to room temperature.Obtain a 90 to 1
10、20-g dry sample by riffling or quartering. If thematerial tends to cake, break up the agglomerates with a softrubber pestle. Quantitatively transfer the weighed sample to an8-in. diameter standard sieve or set of sieves (for example,Nos. 10, 20, 40, 60, 80, and 100 or other appropriate combi-nation
11、conforming to Specification E11). Conduct the sieveanalysis in accordance with Test Methods C 110.8. Sampling, Inspection, etc.8.1 The sampling, inspection, rejection, retesting, packag-ing, and marking shall be conducted in accordance withMethods C50.9. Keywords9.1 animal; feed; limestone; mineral;
12、 supplement1This specification is under the jurisdiction of ASTM Committee C07 on Limeand is the direct responsibility of Subcommittee C07.02 on Specifications andGuidelines.Current edition approved Dec. 1, 2008. Published February 2009. Originallyapproved in 1972. Last previous edition approved in
13、2002 as C 706 02.2For 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 ASTM website.1Copyright ASTM International, 100 Barr Harb
14、or Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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
15、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 withdrawn. Your comments are
16、 invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. 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 rece
17、ived a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard 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) o
18、f 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).TABLE 1 Chemical RequirementsLimestoneClasses(See C51)Calcium,min,percent(as CaCO3)Magnesium,max,percent(asMgCO3)Magnesium,min,percent(as MgCO3)Moisture,max,percentHigh Calcium 95 5 . 0.5Magnesian 60 35A50.5Dolomitic 49 46A35 0.5Ground Limestone 82BB0.5AThe high magnesium content of these materials usually limits their use tospecial-purpose feeds.BAs specified by the purchaser.C 706 02 (2008)12
