ASTM_C_1419_-_14.pdf

Designation:C141914Standard Test Method forSonic Velocity in Refractory Materials at Room Temperatureand Its Use in Obtaining an Approximate Youngs Modulus1This standard is issued under the fixed designation C1419;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes a procedure for measuringthe sonic velocity in refractory materials at room temperature.The sonic velocity can be used to obtain an approximate valuefor Youngs modulus.1.2 The sonic velocity may be measured through the length,thickness,and width of the specimen.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This standard does not purport to address the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C134 Test Methods for Size,Dimensional Measurements,and Bulk Density of Refractory Brick and InsulatingFirebrickC179 Test Method for Drying and Firing Linear Change ofRefractory Plastic and Ramming Mix SpecimensC769 Test Method for Sonic Velocity in ManufacturedCarbon and Graphite Materials for Use in ObtainingYoungs ModulusC885 Test Method for Youngs Modulus of RefractoryShapes by Sonic ResonanceE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodIEEE/ASTM SI10 American National Standard for Use ofthe International System of Units(SI):The Modern MetricSystem3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 longitudinal sonic pulse,na sonic pulse in which thedisplacements are in the direction of propagation of the pulse.3.1.2 pulse travel time,(Tt),nthe total time,measured inmicroseconds,required for the sonic pulse to traverse thespecimen being tested,and for the associated electronic signalsto traverse the circuits of the pulse propagation circuitry.3.1.3 zero time,(To),nthe travel time(correction factor),measured in microseconds,associated with the electroniccircuits in the pulse-propagation system.4.Summary of Test Method4.1 The velocity of sound waves passing through the testspecimen is determined by measuring the distance through thespecimen and dividing by the time lapse between the transmit-ted pulse and the received pulse.3,4An approximate value forYoungs modulus can be obtained as follows:E 5 v2(1)where:E=Youngs modulus of elasticity,Pa,=density,kg/m3,andv=signal velocity,m/s.4.2 Strictly speaking,the elastic constant given by thismeasurement is not E but C33,provided the sonic pulse islongitudinal and the direction of propagation is along the axisof symmetry.3,45.Significance and Use5.1 This test method is used to determine the sonic velocityand approximate Youngs modulus of refractory shapes at1This test method is under the jurisdiction of ASTM Committee C08 onRefractories and is the direct responsibility of Subcommittee C08.01 on Strength.Current edition approved Sept.1,2014.Published October 2014.Originallyapproved in 1999.Last previous edition approved in 2009 as C1419 99a(2009).DOI:10.1520/C1419-14.2For 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.3Schreiber,Anderson,and Soga,Elastic Constants and Their Measurement,McGraw-Hill Book Co.,1221Avenue of theAmericas,NewYork,NY10020,1973.4American Institute of Physics Handbook,3rd ed.,McGraw-Hill Book Co.,1221Avenue of the Americas,New York,NY 10020,1972,pp.398ff.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 room temperature.Since this test is nondestructive,specimensmay be used for other tests as desired.5.2 This test method is useful for research and development,engineering application and design,manufacturing quality andprocess control,and for developing purchasing specifications.6.Apparatus6.1 Driving Circuit,which consists of an ultra sonic pulsegenerator capable of producing pulses in a frequency rangefrom 0.5 to 2.5 MHz.6.2 Transducer,input.6.3 Transducer,output.6.4 Oscilloscope,dual trace with a preamplifier and timedelay circuity.6.5 See Fig.1 for a typical set-up.7.Test Specimen7.1 Specimens may be prisms of any desired length withparallel smooth surfaces.Opposite surfaces across the length,width,and thickness shall be parallel.The smallest dimensionshall be greater than 5 times the diameter of the largestaggregate in the refractory.The surf