ASTM C5-2003(2009) Standard Specification for Quicklime for Structural Purposes.pdf

1、Designation: C5 03 (Reapproved 2009)Standard Specification forQuicklime for Structural Purposes1This standard is issued under the fixed designation C5; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last revision. A nu

2、mber in parentheses indicates the year of last reapproval. A superscriptepsilon () 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 specification covers all classes of quicklime such

3、ascrushed lime, granular lime, ground lime, lump lime, pebblelime, and pulverized lime, used for structural purposes.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 only

4、and are not considered standard.1.3 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 limitati

5、ons prior to use.2. Referenced Documents2.1 ASTM 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

6、 Industry)C110 Test Methods for Physical Testing of Quicklime,Hydrated Lime, and LimestoneC1489 Specification for Lime Putty for Structural PurposesE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3. Terminology3.1 DefinitionsUnless otherwise specified, for definitionsof terms used in

7、 this standard, refer to Terminology C51.4. Chemical Composition4.1 The quicklime shall conform to the following require-ments as to chemical composition, calculated on a nonvolatilebasis:Calcium Lime Magnesium LimeCalcium oxide, min, % 75Magnesium oxide, min, % 20Calcium and magnesium oxide,min, %9

8、5 95Silica, alumina, and oxide of iron,max, %55Carbon dioxide, max, %:If sample is taken at place ofmanufacture33If sample is taken at any otherplace10 105. Residue5.1 The quicklime shall contain no more than 15 weight %of residue.6. General Requirements6.1 Quicklime shall be slaked and aged in acco

9、rdance withthe printed directions of the manufacturer. The resulting limeputty shall be stored until cool.6.2 Lime putty prepared in accordance with AppendixX1.4.2 must conform to the requirements of SpecificationC1489.7. Sampling, Inspection, etc.7.1 The sampling, inspection, rejection, retesting,

10、packag-ing, and marking shall be conducted in accordance withMethods C50.8. Test Methods8.1 Conformance to chemical requirements shall be deter-mined in accordance with Test Methods C25.8.2 Conformance to plasticity and residue requirementsshall be determined in accordance with Test Methods C110.9.

11、Keywords9.1 building (structural); calcium oxide; dolomitic lime;high calcium lime; lime putty; magnesium oxide; plasticity;quicklime; residue; slaking1This specification is under the jurisdiction of ASTM Committee C07 on Limeand is the direct responsibility of Subcommittee C07.02 on Specifications

12、andGuidelines.Current edition approved Dec. 1, 2009. Published May 2010. Originallyapproved in 1913. Last previous edition approved in 2003 as C5 03. DOI:10.1520/C0005-03R09.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For

13、Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.APPENDIX(Nonmandatory Information)X1. SLAKING AND PREPARATION OF LIME PU

14、TTYX1.1 IntroductionX1.1.1 Quicklime can never be used as such for structuralpurposes; it must always be slaked first. Since the method ofslaking is an important factor in determining the quality of thefinished product, the following directions for the preparation oflime putty are given, not as a pa

15、rt of the specification, but asinformation for the further protection of the purchaser.X1.1.2 Different kinds of lime vary considerably in the wayin which they behave with water. A little supervision over theoperation of slaking will amply pay for itself by ensuring theproduction of the greatest pos

16、sible quantity and the bestpossible quality of putty. To find out how to slake a new lot oflime, it is safest to try a little of it and see how it works. Sincedifferent lots of the same brand of lime vary somewhat, andsince the weather conditions at the time have a decidedinfluence, it is wise to tr

17、y a sample from each lot used, whetherfamiliar with the brand or not.X1.2 Classification of LimesX1.2.1 In a bucket, put two or three lumps of lime about thesize of ones fist, or, in the case of granular lime, an equivalentamount. Add sufficient water to just barely cover the lime, andnote how long

18、it takes for slaking to begin. Slaking has begunwhen pieces split off from the lumps or when the lumpscrumble. Water of the same temperature should be used for testand field practice.X1.2.2 If slaking begins in less than 5 min, the lime is quickslaking; from 5 to 30 min, medium slaking; over 30 min,

19、 slowslaking.X1.3 Directions for SlakingX1.3.1 Slake quicklime in accordance with the printeddirections of the manufacturer. When such directions are notprovided, proceed as follows:X1.3.2 For quick-slaking lime, always add the lime to thewater, not the water to the lime. Have sufficient water at fi

20、rst tocover all the lime completely. Have a plentiful supply of wateravailable for immediate usea hose throwing a good stream,if possible. Watch the lime constantly. At the slightest appear-ance of escaping steam, hoe thoroughly and quickly, and addenough water to stop the steaming. Do not be afraid

21、 of usingtoo much water with this kind of lime.X1.3.3 For medium-slaking lime, add the water to the lime.Add enough water so that the lime is about half submerged.Hoe occasionally if steam starts to escape. Add a little waternow and then if necessary to prevent the putty from becomingdry and crumbly

22、. Be careful not to add any more water thanrequired, and not too much at a time.X1.3.4 For slow-slaking lime, add enough water to the limeto moisten it thoroughly. Let it stand until the reaction hasstarted. Cautiously add more water, a little at a time, takingcare that the mass is not cooled by the

23、 fresh water. Do not hoeuntil the slaking is practically complete. If the weather is verycold, it is preferable to use hot water, but if this is not available,the mortar box may be covered in some way to retain the heat.X1.4 Preparation of Putty for UseX1.4.1 After slaking, prepare putty for use as

24、follows:X1.4.2 White CoatAfter slaking and aging finishingquicklime in accordance with the printed directions of themanufacturer, store the putty until cool. If no printed directionsare provided by the manufacturer, prepare the putty for use asfollows: After the action has ceased, run off the putty

25、througha No. 10 (2.00-mm) sieve conforming to Specification E11, andstore for a minimum of 2 weeks.X1.4.3 Base CoatsAfter the action has ceased, run off theputty through a No. 8 (2.36-mm) sieve conforming to Speci-fication E11. Add sand up to equal parts by weight, all of thehair or other fibers req

26、uired, and store for a minimum of 2weeks.X1.4.4 Masons MortarAfter the action has ceased, addpart or all of the sand required, and store for a minimum of 24h.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standa

27、rd. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewe

28、d every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible

29、technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Consh

30、ohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).C5 03 (2009)2