1、Designation: C5 10C5 18Standard 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.Anumber in parenth
2、eses 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.1. Scope1.1 This specification covers all classes of quicklime such as crushed l
3、ime, granular lime, ground lime, lump lime, pebble lime,and pulverized lime, used for structural purposes.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are n
4、ot considered standard.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior t
5、o use.1.4 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers
6、 to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C25 Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated LimeC50C50/C50M Practice for Sampling, Sample Preparation, Packaging, and Marking of Lime and Limestone ProductsC51 Terminology Relating to Lime and Limes
7、tone (as used by the 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 Test Sieves3. Terminology3.1 DefinitionsUnless otherwise specified, for defin
8、itions of terms used in this standard, refer to Terminology C51.4. Chemical Composition4.1 The quicklime shall conform to the following requirements as to chemical composition, calculated on a nonvolatile basis:Calcium Lime Magnesium LimeCalcium oxide, min, % 75Magnesium oxide, min, % 20Calcium and
9、magnesium oxide,min, %95 95Silica, alumina, and oxide of iron,max, %5 5Carbon dioxide, max, %:If sample is taken at place ofmanufacture3 3If sample is taken at any otherplace10 101 This specification is under the jurisdiction of ASTM Committee C07 on Lime and Limestone and is the direct responsibili
10、ty of Subcommittee C07.02 on Specificationsand Guidelines.Current edition approved June 1, 2010Oct. 1, 2018. Published July 2010November 2018. Originally approved in 1913. Last previous edition approved in 20092010 asC503(2009).C5 10. DOI: 10.1520/C0005-10.10.1520/C0005-18.2 For referencedASTM stand
11、ards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an AS
12、TM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published
13、 by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1CalciumLimeMagnesiumLimeCalcium oxide, min, % 75Magnesium oxide, min, % 20Calcium and magnesium oxide, min, % 95 95Silica, alumina, and
14、 oxide of iron, max, % 5 5Carbon dioxide, max, %:If sample is taken at place of manufacture 3 3If sample is taken at any other place 10 105. Residue5.1 The quicklime shall contain no more than 15 weight % of residue.residue as determined by the Test Methods C110 SlakingRate of Quicklime test procedu
15、re.6. General Requirements6.1 Quicklime shall be slaked and aged in accordance with the printed directions of the manufacturer. The resulting lime puttyshall be stored until cool.6.2 Lime putty prepared in accordance with Appendix X1.4.2 must conform to the requirements of Specification C1489.7. Sam
16、pling, Inspection, etc. and So Forth7.1 The sampling, inspection, rejection, retesting, packaging, and marking shall be conducted in accordance with MethodsC50C50/C50M.8. Test Methods8.1 Conformance to chemical requirements shall be determined in accordance with Test Methods C25.8.2 Conformance to r
17、esidue requirements shall be determined in accordance with Test Methods C110.9. Keywords9.1 building (structural); calcium oxide; dolomitic lime; high calcium lime; lime putty; magnesium oxide; plasticity; quicklime;residue; slakingAPPENDIX(Nonmandatory Information)X1. SLAKING AND PREPARATION OF LIM
18、E PUTTYX1.1 IntroductionX1.1.1 Quicklime can never be used as such for structural purposes; it must always be slaked first. Since the method of slakingis an important factor in determining the quality of the finished product, the following directions for the preparation of lime puttyare given, not a
19、s a part of the specification, but as information for the further protection of the purchaser.X1.1.2 Different kinds of lime vary considerably in the way in which they behave with water. A little supervision over theoperation of slaking will amply pay for itself by ensuring the production of the gre
20、atest possible quantity and the best possiblequality of putty. To find out how to slake a new lot of lime, it is safest to try a little of it and see how it works. Since differentlots of the same brand of lime vary somewhat, and since the weather conditions at the time have a decided influence, it i
21、s wiseto try a sample from each lot used, whether familiar with the brand or not.X1.2 Classification of LimesX1.2.1 In a bucket, put two or three lumps of lime about the size of ones fist, or, in the case of granular lime, an equivalentamount.Add sufficient water to just barely cover the lime, and n
22、ote how long it takes for slaking to begin. Slaking has begun whenpieces split off from the lumps or when the lumps crumble.Water of the same temperature should be used for test and field practice.X1.2.2 If slaking begins in less than 5 min, the lime is quick slaking; from 5 to 30 min, medium slakin
23、g; over 30 min, slow slaking.C5 182X1.3 Directions for SlakingX1.3.1 Slake quicklime in accordance with the printed directions of the manufacturer. When such directions are not provided,proceed as follows:X1.3.2 For quick-slaking lime, always add the lime to the water, not the water to the lime. Hav
24、e sufficient water at first to coverall the lime completely. Have a plentiful supply of water available for immediate usea hose throwing a good stream, if possible.Watch the lime constantly. At the slightest appearance of escaping steam, hoemix thoroughly and quickly, and add enough waterto stop the
25、 steaming. Do not be afraid of using too 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. Hoeoccasionally if steam starts to escape. Add a little water now and then if necessary to prevent the putt
26、y from becoming dry andcrumbly. Be careful not to add any more water than required, and not too much at a time.X1.3.4 For slow-slaking lime, add enough water to the lime to moisten it thoroughly. Let it stand until the reaction has started.Cautiously add more water, a little at a time, taking care t
27、hat the mass is not cooled by the fresh water. Do not hoemix until theslaking is practically complete. If the weather is very cold, it is preferable to use hot water, but if this is not available, the mortarbox may be covered in some way to retain the heat.X1.4 Preparation of Putty for UseX1.4.1 Aft
28、er slaking, prepare putty for use as follows:X1.4.2 White CoatAfter slaking and aging finishing quicklime in accordance with the printed directions of the manufacturer,store the putty until cool. If no printed directions are provided by the manufacturer, prepare the putty for use as follows: After t
29、heaction has ceased, run off the putty through a No. 10 (2.00-mm)2.0-mm (No. 10) sieve conforming to Specification E11, and storefor a minimum of 2two weeks.X1.4.3 Base CoatsAfter the action has ceased, run off the putty through a No. 8 (2.36-mm)2.36-mm (No. 8) sieve conformingto Specification E11.A
30、dd sand up to equal parts by weight, all of the hair or other fibers required, and store for a minimum of 2twoweeks.X1.4.4 Masons MortarAfter the action has ceased, add part or all of the sand required, and store for a minimum of 24 h.24 h.ASTM International takes no position respecting the validity
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