1、Designation: C568/C568M 10Standard Specification forLimestone Dimension Stone1This standard is issued under the fixed designation C568/C568M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revision. A number in pa
2、rentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers the material characteristics,physical re
3、quirements, and sampling appropriate to the selec-tion of limestone for general building and structural purposes.Refer to Guides C1242 and C1528 for the appropriate selectionand use of limestone dimension stone.1.2 Dimension limestone shall include stone that is sawed,cut, split, or otherwise finish
4、ed or shaped and shall specificallyexclude molded, cast, or otherwise artificially aggregated unitsof composed fragments, and also crushed and broken stone.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not b
5、e exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.2. Referenced Documents2.1 ASTM Standards:2C97/C97M Test Methods for Absorption and Bulk SpecificGravity of Dimension StoneC99/C99M
6、 Test Method for Modulus of Rupture of Dimen-sion StoneC119 Terminology Relating to Dimension StoneC170/C170M Test Method for Compressive Strength ofDimension StoneC241/C241M Test Method for Abrasion Resistance ofStone Subjected to Foot TrafficC1242 Guide for Selection, Design, and Installation ofDi
7、mension Stone Attachment SystemsC1353 Test Method for Abrasion Resistance of DimensionStone Subjected to Foot Traffic Using a Rotary Platform,Double-Head AbraserC1528 Guide for Selection of Dimension Stone3. Terminology3.1 DefinitionsAll definitions are in accordance with Ter-minology C119.4. Classi
8、fication4.1 Dimension limestone shall be classified into three cat-egories, generally descriptive of those limestones having den-sities in approximate ranges, as follows:4.1.1 I (Low-Density)Limestone having a density rang-ing from 110 through 135 lb/ft31760 through 2160 kg/m3.4.1.2 II (Medium-Densi
9、ty)Limestone having a densitygreater than 135 and not greater than 160 lb/ft32160 through2560 kg/m3.4.1.3 III (High-Density)Limestone having a densitygreater than 160 lb/ft32560 kg/m3.5. Physical Requirements5.1 Limestone supplied under this specification shall con-form to the physical requirements
10、listed in Table 1.5.2 Limestone shall be sound, durable, and free of spalls,cracks, open seams, pits, or other defects that are likely toimpair its structural integrity in its intended use.5.3 The desired color and texture, with their permissiblenatural variations in material characteristics for all
11、 material tobe produced for the project, shall be established by controlsamples. Select representative samples by viewing a sufficientnumber of physical samples prior to production that show thecomplete range of variations in color and texture of thelimestone specified.6. Sampling6.1 Samples, if req
12、uired, for testing to determine the char-acteristics and physical properties shall be representative of thelimestone to be used.7. Keywords7.1 calcium carbonate; limestone1This specification is under the jurisdiction of ASTM Committee C18 onDimension Stone and is the direct responsibility of Subcomm
13、ittee C18.03 onMaterial Specifications.Current edition approved Sept. 1, 2010. Published October 2010. Originallyapproved in 1965 . Last previous edition approved in 2008 as C568 08a. DOI:10.1520/C0568_C0586M-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Cus
14、tomer 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 Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ASTM International takes no positi
15、on 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 such rights, are entirely their own responsibility
16、.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 invited either for revision of this standard or for additional standardsand should be addressed to ASTM
17、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 received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address sh
18、own 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) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-83
19、2-9555 (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 ASTM website (www.astm.org/COPYRIGHT/).TABLE 1 Physical RequirementsNOTEThe values in Table 1 were established using samples prepared accordi
20、ng to the individual test methods. Finishes, other than those specifiedin the individual test methods, may result in a deviation from established values.Physical PropertyTest Requirements Classification Test Meth-od(s)Absorption by weight, max, % 127.53IIIIIIlow-densitymedium-densityhigh-densityC97/
21、C97MDensity, min, lb/ft3kg/m3 110 1760135 2160160 2560IIIIIIlow-densitymedium-densityhigh-densityC97/C97MCompressive strength, min, psi MPa 1800 124000 288000 55IIIIIIlow-densitymedium-densityhigh-densityC170/C170MModulus of rupture min, psi MPa 400 2.8500 3.41000 6.9IIIIIIlow-densitymedium-densityh
22、igh-densityC99/C99MAbrasion resistance, min, hardnessA,B,C101010IIIIIIlow-densitymedium-densityhigh-densityC241/C241M/C1353APertains only to stone subject to foot traffic.BThe supplier of the No. 60Alundum abrasive, Norton, has indicated that the formula for Norton treatment 138S has been changed. T
23、he new abrasive is currrently moreaggressive, resulting in lower abrasive hardness values (Ha) than when the standard was initially established. As such, care should be taken when interpreting Havaluesfrom tests using the new abrasive, particularly with regard to currentASTM stone standard specifica
24、tion requirements for abrasion resistance, which were developed whenthe original abrasive was still in use. Committee C18 is actively studying alternatives to address this issue.CAbrasion Resistance Test Method C1353 will eventually replace Test Method C241/C241M and it is not necessary to perform both tests. Availability of the properequipment and materials by the testing laboratory may determine which test is performed.C568/C568M 102
