ASTM_C_1352_-_C_1352M_-_15.pdf

Designation:C1352/C1352M15Standard Test Method forFlexural Modulus of Elasticity of Dimension Stone1This standard is issued under the fixed designation C1352/C1352M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the procedure for determiningthe flexural modulus of elasticity of stone by using a simplebeam with quarter-point loading.1.2 Stone tests may be made with load applied perpendicu-lar to the bedding plane or rift and with load applied parallel tothe bedding plane or rift.1.3 Stone tests may be made for wet and dry specimenconditions.1.4 The specifier of the test shall determine which condi-tions shall be used.1.5 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.1.6 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.2.Referenced Documents2.1 ASTM Standards:2C119 Terminology Relating to Dimension StoneC880 Test Method for Flexural Strength of Dimension StoneC1799 Guide to Dimension Stone Test Specimen Samplingand PreparationE4 Practices for Force Verification of Testing Machines3.Terminology3.1 DefinitionFor definitions of terms used in this testmethod,refer to Terminology C119.3.2 Definitions of Terms Specific to This Standard:3.2.1 modulus of elasticity,nstress per unit strain,alsoknown as Youngs Modulus.4.Significance and Use4.1 This test method is useful for providing engineeringvalues for stress and deflection analysis of stone panels.It isalso useful in indicating the differences in flexural modulus ofelasticity between various dimension stones and stones of thesame type in different loading directions(parallel and perpen-dicular to rift or bedding planes).5.Apparatus5.1 Testing Machine(see Fig.1),conforming to the require-ments of the applicable sections of Practices E4.The quarter-point loading method shall be used in making flexure tests ofstone employing bearing blocks that will ensure that forcesapplied to the beam will be vertical only and applied withouteccentricity.The apparatus should be capable of maintainingthe span length and distances between load-applying blocksand support blocks constant within 60.05 in.61 mm.Theload should be capable of being applied at a uniform rate andin such a manner as to avoid shock.5.2 Deflection Gages,capable of reading to 0.0001 in.0.002 mm shall be used to measure mid-span deflections atthe two free edges and support deflections at each end.6.Test Specimens6.1 The test specimens shall measure 4 in.100 mm wideby 1.25 in.30 mm thick by 15 in.350 mm long with a spanas tested of 12.5 in.300 mm.The sides of the specimens shallbe at right angles with the top and bottom.The specimens shallhave a fine abrasive finish on the planes perpendicular to theload and a fine saw finish on the other four planes.Thedimensions of the specimen shall be measured and recorded tothe nearest 0.01 in.0.1 mm.A minimum of five specimensshall be tested for each condition of test.The average valuecalculated from plots of the test results is reported as theflexural modulus of elasticity for that condition.6.2 Where the job thickness has been set(the thickness ofthe stone panels for the project has been established),it is oftenrequested to perform flexural modulus of elasticity tests at thejob thickness.The following shall govern the specimen size1This 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 May 1,2015.Published July 2015.Originally approvedin 1996.Last previous edition approved in 2009 as C135209.DOI:10.1520/C1352_C1352M-15.2For 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 States1 where it is requested to test at the job thickness,and the jobthickness is other than 1.25 in.30 mm.The span as testedshall be ten times the thickness.The specimen lengths shall benot less than 2 in.50 mm and not more than 4 in.100 mmgreater than the span as tested.Where the thickness is less than2.67 in.70 mm,the width of the specimen shall be 4