ASTM C5-2010 Standard Specification for Quicklime for Structural Purposes《建筑用生石灰的标准规范》.pdf

1、Designation: C5 10Standard 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 number in parenthese

2、s 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 ascrushed lime, gr

3、anular 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 onlyand are not consid

4、ered 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 limitations prior to use.2

5、. 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 Industry)C110 Tes

6、t 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 this standard, re

7、fer 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, %95 95Silica, alumin

8、a, 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 accordance withthe pri

9、nted 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, packag-ing, and ma

10、rking 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 residue requirements shall be deter-mined in accordance with Test Methods C110.9. Keywords9.1 building (structura

11、l); 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 andGuidelines.Current edition a

12、pproved June 1, 2010. Published July 2010. Originally approvedin 1913. Last previous edition approved in 2009 as C503(2009). DOI: 10.1520/C0005-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandard

13、s 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 PUTTYX1.1 IntroductionX1.1.1

14、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 part of the specification, bu

15、t 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 possible quantity and the best

16、possible 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 try a sample from each lot us

17、ed, 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 it takes for slaking to beg

18、in. 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, slowslaking.X1.3 Direction

19、s 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 first tocover all the lime co

20、mpletely. 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 of usingtoo much water wit

21、h 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. Be careful not to add any

22、 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 fresh water. Do not hoeunt

23、il 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 follows:X1.4.2 White CoatAf

24、ter 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 througha No. 10 (2.00-mm) s

25、ieve 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 required, and store for a mini

26、mum 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 standard. Users of this standard

27、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 reviewed every five years andif no

28、t 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 technical committee, which

29、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 Conshohocken, PA 19428-2959,Unit

30、ed 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/).C5102