1、Designation:C56613Standard Test Method forTotal Evaporable Moisture Content of Aggregate by Drying1This standard is issued under the fixed designation C566;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A n
2、umber in parentheses indicates 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.Scope1.1 This test method covers the determination of the per-ce
3、ntage of evaporable moisture in a sample of aggregate bydrying both surface moisture and moisture in the pores of theaggregate.Some aggregate may contain water that is chemi-cally combined with the minerals in the aggregate.Such wateris not evaporable and is not included in the percentagedetermined
4、by this test method.1.2 The values stated in SI units are to be regarded as thestandard.No other units of measurement are included in thisstandard.NOTE1Sieve size is identified by its standard designation inSpecification E11.The alternative designation given in parentheses is forinformation only and
5、 does not represent a different standard sieve size.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 re
6、gulatory limitations prior to use.For specificprecautionary statements,see 5.3.1,7.2.1,and 7.3.1.2.Referenced Documents2.1 ASTM Standards:2C29/C29M Test Method for Bulk Density(“Unit Weight”)and Voids in AggregateC125 Terminology Relating to Concrete and Concrete Ag-gregatesC127 Test Method for Rela
7、tive Density(Specific Gravity)and Absorption of Coarse AggregateC128 Test Method for Relative Density(Specific Gravity)and Absorption of Fine AggregateC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsD75 Practice for Sampling AggregatesE11 Specifica
8、tion for Woven Wire Test Sieve Cloth and TestSieves2.2 Other Document:National Research Council Report SHRP-P-61933.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method,referto Terminology C125.4.Significance and Use4.1 This test method is sufficiently accurate for usua
9、lpurposes,such as adjusting batch quantities of ingredients forconcrete.It will generally measure the moisture in the testsample more reliably than the sample can be made to representthe aggregate supply.In cases where the aggregate itself isaltered by heat,or where more refined measurement isrequir
10、ed,the test should be conducted using a ventilated,controlled temperature oven.4.2 Large particles of coarse aggregate,especially thoselarger than 50 mm,will require greater time for the moisture totravel from the interior of the particle to the surface.The userof this test method should determine b
11、y trial if rapid dryingmethods provide sufficient accuracy for the intended use whendrying large size particles.5.Apparatus5.1 BalanceA balance or scale accurate,readable,andsensitive to within 0.1%of the test load at any point within therange of use.Within any interval equal to 10%of the capacityof
12、 the balance or scale used to determine mass,the loadindication shall be accurate within 0.1%of the difference inmasses.5.2 Source of HeatA ventilated oven capable of maintain-ing the temperature surrounding the sample at 110 6 5C.Where close control of the temperature is not required(see1This test
13、method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregatesand is the direct responsibility of SubcommitteeC09.20 on Normal Weight Aggregates.Current edition approved Feb.1,2013.Published February 2013.Originallyapproved in 1965.Last previous edition approved in 2004 as
14、 C566 97(2004).DOI:10.1520/C0566-13.2For 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.3Available from the National R
15、esearch Council,2101 Constitution Ave.,N.W.,Washington,DC 20418.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.1),other suitable sources of heat may be used,such as anelectric or gas hot plate,electric heat lamps,or a ventilatedmicrowa
16、ve oven.5.3 Sample ContainerAcontainer not affected by the heat,of sufficient volume to contain the sample without danger ofspilling,and of such shape that the depth of sample will notexceed one fifth of the least lateral dimension.5.3.1 PrecautionWhen a microwave oven is used,thecontainer shall be nonmetallic.NOTE2Except for testing large samples,an ordinary frying pan issuitable for use with a hot plate,or any shallow flat-bottomed metal panis suitable with heat lamps or oven.Note the precauti