ASTM_C_25_-_11e2.pdf

Designation:C25112Standard Test Methods forChemical Analysis of Limestone,Quicklime,and HydratedLime1This standard is issued under the fixed designation C25;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()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.1NOTERevised 28.3.5 editorially for clarity in May 2016.1.Scope1.1 These test methods cover the chemical analysis ofhigh-calcium and dolomitic limestone,quicklime,and hy-drated lime.These test methods are classified as either standard(preferred)or alternative(optional).1.2 The standard test methods are those that employ classi-cal gravimetric or volumetric analytical procedures and aretypically those required for referee analyses where chemicalspecification requirements are an essential part of contractualagreement between buyer and seller.1.3 Alternative or optional test methods are provided forthose who wish to use procedures shorter or more convenientthan the standard methods for the routine determinations ofcertain constituents.Optional test methods may sometimes bepreferred to the standard test methods,but frequently the use ofmodern and expensive instrumentation is indicated which maynot be accessible to everyone.Therefore,the use of these testmethods must be left to the discretion of each laboratory.1.4 The analytical procedures appear in the following order:SectionAluminum Oxide15Available Lime Index28Calcium and Magnesium Oxide:Alternative EDTA TitrationMethod31Calcium Carbonate Equivalent33Calcium Oxide:Gravimetric Method16Volumetric Method17Carbon Dioxide by StandardMethod22Combined Oxides of Iron andAluminum12Ferrous IronAppendix X5Free Calcium OxideAppendix X6Free Moisture in Hydrated Lime21Free Moisture in Limestone20Free Silica29Insoluble Matter Including Silicon Dioxide:Standard Method8Optional Perchloric Acid Method9Insoluble Matter Other Than SiliconDioxide11Loss on Ignition19Magnesium Oxide18Manganese:Bismuthate MethodAppendix X4Periodate(Photometric)Method27pH Determination of Alkaline EarthSolutions34Phosphorus:Titrimetric MethodAppendix X3Molybdovanadate Method26Silicon Dioxide10Strontium OxideAppendix X2Sulfur Trioxide23Total Carbon:Direct Combustion-ThermalConductivity Cell Method32Total Carbon and Sulfur:Combustion/Infrared DetectionMethod35Total Iron:Standard Method,PotassiumDichromate Titration13Potassium PermanganateTitration MethodAppendix X1Ortho-Phenanthroline,Photometric Method14Total Sulfur:Sodium Carbonate Fusion24Combustion-Iodate TitrationMethod25Unhydrated Oxides301These test methods are under the jurisdiction of ASTM Committee C07 onLime and Limestone and are the direct responsibility of Subcommittee C07.05 onChemical Tests.Current edition approved June 1,2011.Published May 2016.Originallyapproved in 1919.Last previous edition approved in 2011 as C25 111.DOI:10.1520/C0025-11E02.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 1.5 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.For specificprecautionary statements,see 9.3,10.2.1,18.4.3,31.6.4.2,X2.3.1,and X5.4.1.1.2.Referenced Documents2.1 ASTM Standards:2C50 Practice for Sampling,Sample Preparation,Packaging,and Marking of Lime and Limestone ProductsC51 Terminology Relating to Lime and Limestone(as usedby the Industry)C911 Specification for Quicklime,Hydrated Lime,andLimestone for Selected Chemical and Industrial UsesD1193 Specification for Reagent WaterE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE50 Practices for Apparatus,Reagents,and Safety Consid-erations for Chemical Analysis of Metals,Ores,andRelated MaterialsE70 Test Method for pH of Aqueous Solutions With theGlass ElectrodeE173 Practice for Conducting Interlaboratory Studies ofMethods for Chemical Analysis of Metals(Withdrawn1998)3E177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE200 Practice for Preparation,Standardization,and Storageof Standard and Reagent Solutions for Chemical AnalysisE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE832 Specification for Laboratory Filter Papers3.Terminology3.1 Definitions:DefinitionsUnless otherwise specified,fordefinitions of terms used in these test methods refer toTerminology C51.4.Significance and Use4.1 These test methods provide accurate and reliable ana-lytical procedures to determine the chemical constituents oflimestone,quicklime,and hydrated lime(See Note 1).Thepercentages of specif