1、Designation:C82114Standard Specification forLime for Use with Pozzolans1This standard is issued under the fixed designation C821;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 indica
2、tes the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers all types of commercial hy-drated lime such as:high-calcium,magnesium,or dolomitic-hydrated lime.By-product limes and slaked quick limes in
3、dry,wet,or slurried form are also included.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.1.3 This standard does not purport to addre
4、ss 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 fo
5、r 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)C204 Test Methods for Fineness of Hydraulic Cement byAir-Permeability App
6、aratusC593 Specification for Fly Ash and Other Pozzolans for UseWith Lime for Soil StabilizationC1271 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)a
7、nd Atomic Absorption(AA)3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this specification,referto Terminology C51.3.2 Definitions of Terms Specific to This Standard:3.2.1 chemical factor,na numerical value of the activeconstituents in the hydrated lime that react chemically with
8、 apozzolan.The value is based on the combined calcium oxideequivalents of free calcium oxide,calcium hydroxide,andmagnesium oxide.Calcium carbonate and magnesium hydrox-ide are excluded,since these compounds have been found to benonreactive.3.2.2 pozzolanic receptivity index,na performance factorinc
9、orporating both chemical quality and fineness,determinedby Eq 3.4.Chemical and Physical Requirements4.1 The lime shall conform to the requirements listed inTable 1,except as noted in Section 5.5.Performance Requirements5.1 If the chemical factor,Blaine fineness,or pozzolanicreceptivity index is belo
10、w the limits given in Table 1,the limeshall be required to meet the applicable performance require-ments listed in Table 2.Where such lime complies with thelimits listed in Table 2,it shall be considered acceptable for usewith pozzolans.However,it may be necessary to increase thelime content in the
11、lime-pozzolan mixtures in order to meetminimum design criteria.6.Test Methods6.1 Chemical Factor:6.1.1 Determine calcium oxide(CaO)and magnesium oxide(MgO)contents in accordance with Methods C25,C1271,orC1301.Determine the carbon dioxide(CO2)content in accor-dance with Method C25.When the magnesium
12、oxide content isgreater than 5%,determine the peak height of magnesiumoxide and magnesium hydroxide using standard X-ray diffrac-tion procedures and calculate the ratio(r)of magnesium oxideto hydroxide using Eq 1.When the magnesium oxide is lessthan 5%,the value of r shall be 0.30.1This specificatio
13、n is under the jurisdiction of ASTM Committee C07 on Limeand Limestone and is the direct responsibility of Subcommittee C07.02 onSpecifications and Guidelines.Current edition approved July 1,2014.Published July 2014.Originally approvedin 1975.Last previous edition approved in 2009 as C821 09.DOI:10.
14、1520/C0821-14.2For 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.*A Summary of Changes section appears at the end of
15、this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 r 5cps MgOcps MgO12.0cps MgOH!2!(1)where:cps=counts per second of principal peaks corresponding toan interplanar spacing for MgO of 2.106 and forMg(OH)2of 2.365.6.1.2 Calculatio
16、n of Chemical FactorUsing the test re-sults provided by 6.1.1 the chemical factor(C.F.)is determinedby Eq 2:C.F.5CaO!2 1.27CO2!11.4 rMgO!(2)6.2 Blaine FinenessCalculate in accordance with MethodC204,except use the specific gravity of the lime in calculatingthe trial weight of the sample,and the weight finally chosenmust result in a firm bed as described in Test Method C204.Use the specific gravity of the lime and finally chosen weightto determine the porosity of the bed in accordance with Eq 2 o
