ASTM_C_50_-_C_50M_-_13.pdf

Designation:C50/C50M13Standard Practice forSampling,Sample Preparation,Packaging,and Marking ofLime and Limestone Products1This standard is issued under the fixed designation C50/C50M;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.This standard has been approved for use by agencies of the Department of Defense.1.Scope1.1 This practice covers procedures for the collection andreduction of samples of lime and limestone products to be usedfor physical and chemical tests.1.2 This practice further covers inspection,rejection,retesting,packing,and marking of lime and limestone productsas it may be used in the chemical,agricultural,and processindustries.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.Within the text,theinch-pound units are shown in brackets.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.1.4 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:2C25 Test Methods for Chemical Analysis of Limestone,Quicklime,and Hydrated LimeC110 Test Methods for Physical Testing of Quicklime,Hydrated Lime,and LimestoneC400 Test Methods for Quicklime and Hydrated Lime forNeutralization of Waste AcidC1271 Test Method for X-ray Spectrometric Analysis ofLime and LimestoneC1301 Test Method for Major and Trace Elements in Lime-stone and Lime by Inductively Coupled Plasma-AtomicEmission Spectroscopy(ICP)and Atomic Absorption(AA)D2234/D2234M Practice for Collection of a Gross Sampleof CoalD3665 Practice for Random Sampling of Construction Ma-terialsE105 Practice for Probability Sampling of MaterialsE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or ProcessE141 Practice for Acceptance of Evidence Based on theResults of Probability SamplingE177 Practice for Use of the Terms Precision and Bias inASTM Test Methods3.Terminology3.1 accuracya term generally used to indicate the reliabil-ity of a sample,a measurement,or an observation and is ameasure of closeness of agreement between an experimentalresult and the true value.3.2 bias(systematic error)an error that is consistentlynegative or consistently positive.The mean of errors resultingfrom a series of observations which does not tend towards zero.3.3 chance errorerror that has equal probability of beingpositive or negative.The mean of the chance errors resultingfrom a series of observations that tends toward zero as thenumber of observations approach infinity.3.4 combined waterwater that is chemically bonded tocalcium or magnesium oxide to form hydrate.3.5 errorthe difference of an observation or a group ofobservations from the best obtainable estimate of the truevalue.3.6 free waterwater that is not chemically bonded tocalcium or magnesium oxide.3.7 gross samplea sample representing one lot of materialand composed of a number of increments on which neitherreduction nor division has been performed.1This practice is under the jurisdiction of ASTM Committee C07 on Lime andis the direct responsibility of Subcommittee C07.06 on Physical Tests.Current edition approved June 1,2013.Published July 2013.Originally approvedin 1922.Last previous edition approved in 2012 as C50/C50M12.DOI:10.1520/C0050_C0050M-13.2For 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 3.8 incrementa small portion of the lot collected by oneoperation of a sampling device and normally combined withother increments from the lot to make a gross sample.3.9 laboratory samplerefers to the sample after the initialpreparation from which the analytical sample is obtained.3.10 lota discrete quantity of material for which theoverall quality to a particular precision needs to be determined.3.11 precisiona term used to indicate the capability of aperson,an instrument,or a method to obtain repeatable results;specifically,a measure of the chance error as expressed by thevariance,the standard error,or a multiple of the standard error(see Practice E177).3.12 representative samplea sample collected in such amanner that every particle in the lot to be sampled is eq