ASTM_C_170_-_C_170M_-_17.pdf

Designation:C170/C170M17Standard Test Method forCompressive Strength of Dimension Stone1This standard is issued under the fixed designation C170/C170M;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 parentheses 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 U.S.Department of Defense.1.Scope1.1 This test method covers the sampling,preparation ofspecimens,and determination of the compressive strength ofdimension stone.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.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 practices and determine the applica-bility of regulatory limitations prior to use.1.4 This international standard 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.Referenced Documents2.1 ASTM Standards:2C39 Test Method for Compressive Strength of CylindricalConcrete SpecimensC119 Terminology Relating to Dimension StoneC1799 Guide to Dimension Stone Test Specimen Samplingand PreparationD4543 Practices for Preparing Rock Core as Cylindrical TestSpecimens and Verifying Conformance to Dimensionaland Shape TolerancesD7012 Test Methods for Compressive Strength and ElasticModuli of Intact Rock Core Specimens under VaryingStates of Stress and TemperaturesE4 Practices for Force Verification of Testing Machines3.Terminology3.1 DefinitionsAll definitions are in accordance with Ter-minology C119.4.Significance and Use4.1 This test method is useful in indicating the differences incompressive strength between the various dimension stones.This test method also provides one element in comparingstones of the same type.5.Apparatus5.1 The testing machine used shall conform to the require-ments of Test Method C39,Section 5,including the calibrationrequirements of Practices E4.5.2 The testing machine used shall be capable of applyingthe required load at a uniform rate as prescribed in Section 9and applying load in a steady manner as to avoid sudden orrapid load changes.5.3 The spherical bearing block of the testing machine shallbe suspended from the upper head so that the contact plateremains in a central position(spherical surfaces in full contact)when not loaded.The spherical surfaces shall be welllubricated,and the center of curvature shall be aligned withinthe surface of contact with the specimen.5.4 Fig.1 illustrates the correct alignment of a specimen andthe typical components of a testing machine conforming tothese requirements.6.Sampling6.1 The sample shall be selected to represent a true averageof the type or grade of stone under consideration and shall beof the quality supplied to the market in finished form under thetype designation to be tested.The samples may be selected bythe purchaser or his authorized representative from quarriedstone or taken from the natural ledge and shall be of adequatesize to permit the preparation of the desired number of test1This test method is under the jurisdiction of ASTM Committee C18 onDimension Stone and is the direct responsibility of Subcommittee C18.01 on TestMethods.Current edition approved April 1,2017.Published April 2017.Originallyapproved in 1941.Last previous edition approved in 2016 as C170/C170M16.DOI:10.1520/C0170_C0170M-17.2For 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.Copyright 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 standardization 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.1 specimens.When perceptible variations occur,the purchasermay select as many samples as are necessary to determine thevariation in compressive strength.6.2 Compressive strength testing of specimens in more thantwo orientations with respect to splitting,including:rift(planeof easiest splitting),grain(plane of next easi