1、Designation:C20614Standard Specification forFinishing Hydrated Lime1This standard is issued under the fixed designation C206;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
2、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 U.S.Department of Defense.1.Scope*1.1 This specification covers two types of finishing hydratedlime that are suitable for u
3、se in the scratch,brown,and finishcoats of plaster,for stucco,for mortar,and as an addition toportland-cement concrete.The two types of lime sold underthis specification shall be designated as follows:1.1.1 Type NNormal hydrated lime for finishing purposes,and1.1.2 Type SSpecial hydrated lime for fi
4、nishing purposes.NOTE1Type N,normal finishing hydrated lime,is differentiated fromType S,special finishing hydrated lime,in that no limitation on the amountof unhydrated oxides is specified for Type N hydrate,and the plasticityrequirement for Type N hydrate shall be determined after soaking for 16to
5、 24 h.NOTE2For lime putty,refer to Specification C1489.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2.Referenced Documents2.1 ASTM
6、Standards:2C25 Test Methods for Chemical Analysis of Limestone,Quicklime,and Hydrated LimeC50 Practice for Sampling,Sample Preparation,Packaging,and Marking of Lime and Limestone ProductsC51 Terminology Relating to Lime and Limestone(as usedby the Industry)C110 Test Methods for Physical Testing of Q
7、uicklime,Hydrated Lime,and LimestoneC842 Specification for Application of Interior Gypsum Plas-terC1271 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
8、)and Atomic Absorption(AA)C1489 Specification for Lime Putty for Structural Purposes3.Terminology3.1 DefinitionsFor definitions of terms relating to hy-drated lime,refer to Terminology C51.4.Chemical Composition4.1 Hydrated lime for finishing purposes shall conform tothe following requirements as to
9、 chemical composition:Type NType SCalcium and magnesium oxides(LOI-free basis),min,%9595Carbon dioxide(as-received basis),max,%If sample is taken at the place of manufacture55If sample is taken at any other place77Unhydrated oxides(as-received basis),max,%.85.Residue5.1 The percentage residue of fin
10、ishing hydrated lime shallconform to the following requirements:Residue retained on 600-m(No.30)sieve,max,%0.5Residue retained on 75-m(No.200)sieve,max,%156.Popping and Pitting6.1 Finishing hydrated lime shall show no pops or pits whentested in accordance with the method prescribed in 10.1.2.7.Plast
11、icity7.1 The putty made from Type N,normal finishing hydratedlime,shall have a plasticity figure of not less than 200 whensoaked for a period of not less than 16 h nor more than 24 h.7.2 The putty made from Type S,special finishing hydratedlime,shall have a plasticity figure of not less than 200 whe
12、ntested commencing within 30 min after mixing with water.8.Application of Interior Gypsum Plaster8.1 For recommended application procedures refer to Speci-fication C842.1This specification is under the jurisdiction of ASTM Committee C07 on Limeand Limestone and is the direct responsibility of Subcom
13、mittee C07.02 onSpecifications and Guidelines.Current edition approved Dec.1,2014.Published December 2014.Originallyapproved in 1946.Replaces C6 49(1974).Last previous edition approved in 2009as C206 03(2009).DOI:10.1520/C0206-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orc
14、ontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Con
15、shohocken,PA 19428-2959.United States1 9.Sampling,Inspection,and so forth9.1 The sampling,inspection,rejection,retesting,packing,and marking shall be conducted in accordance with MethodsC50.10.Test Methods10.1 The properties enumerated in this specification shall bedetermined in accordance with the
16、following methods:10.1.1 Chemical AnalysisTest Methods C25 or,for totalcalcium and magnesium oxides,Test Methods C1271 orC1301.10.1.2 Physical TestsTest Methods C110.11.Package Marking11.1 Type N hydrated lime,in bags,conforming to thisspecification,shall be soaked for a minimum of 16 h prior touse.12.Keywords12.1 finishing lime;masonry;plaster;plasticity;poppingand pitting;residue;Type N;Type S;unhydrated oxidesSUMMARY OF CHANGESCommittee C07.02 has identified the location of selected changes t
