1、Designation:C123/C123M14American Association StateHighway and Transportation StandardAASHTO No.:T 113Standard Test Method forLightweight Particles in Aggregate1This standard is issued under the fixed designation C123/C123M;the number immediately following the designation indicates the yearof origina
2、l adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript 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 Defens
3、e.1.Scope1.1 This test method covers the determination of the per-centage of lightweight particles in aggregate by means ofsink-float separation in a heavy liquid of suitable specificgravity.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The val
4、ues stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.Some values have only SI units because theinch-pound equivalents are not used in the practice.NOTE1S
5、ieve size is identified by its standard designation in Speci-fication E11.The alternative designation given in parentheses is forinformation only and does not represent a different standard sieve size.1.3 The text of this standard references notes and footnoteswhich provide explanatory material.Thes
6、e notes and footnotes(excluding those in tables and figures)shall not be consideredas requirements of the standard.1.4 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 saf
7、ety and health practices and determine the applica-bility of regulatory limitations prior to use.For a specifichazard statement,see 6.1.4.2.Referenced Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC125 Terminology Relating to Concrete and Concrete Ag-gregatesC127 Test Method
8、for Density,Relative Density(SpecificGravity),and Absorption of Coarse AggregateC128 Test Method for Density,Relative Density(SpecificGravity),and Absorption of Fine AggregateC702 Practice for Reducing Samples ofAggregate to TestingSizeC1005 Specification for Reference Masses and Devices forDetermin
9、ing Mass and Volume for Use in the PhysicalTesting of Hydraulic CementsD75 Practice for Sampling AggregatesD3665 Practice for Random Sampling of Construction Ma-terialsE11 Specification for Woven Wire Test Sieve Cloth and TestSievesE100 Specification for ASTM Hydrometers3.Terminology3.1 For definiti
10、ons of terms used in this test method,refer toTerminology C125.4.Significance and Use4.1 This test method is used to determine conformance withprovisions of Specification C33 pertaining to the amount oflightweight material in fine and coarse aggregates.A heavyliquid with a specific gravity of 2.0 is
11、 used to separate particleswhich may be classified as coal or lignite.Heavier liquids areto be used to check the percentages of other lightweightparticles such as chert and shale having a specific gravity lessthan 2.40.4.2 The test method is useful in identifying porous aggre-gate particles in resea
12、rch activities or in petrographic analyses.5.Apparatus5.1 BalancesFor determining the mass of fine aggregates,a balance having a capacity of not less than 500 g,sensitive toat least 0.1 g:for determining the mass of coarse aggregate,abalance having a capacity of not less than 5000 g,sensitive toat l
13、east 1 g.Both balances shall conform to the accuracycriterion of the applicable sections of Specification C1005.1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregatesand is the direct responsibility of SubcommitteeC09.20 on Normal Weight Aggregates.Curre
14、nt edition approved Dec.15,2014.Published January 2015.Originallyapproved in 1936.Last previous edition approved in 2012 as C123/C123M12.DOI:10.1520/C0123_C0123M-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book o
15、f ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.2 Containers suitable for drying the aggregate sample,and containers suitable for holding
16、 the heavy liquid during thesink-float separation.5.3 SkimmerA piece of 300-m(No.50)sieve cloth,conforming to Specification E11,of suitable size and shape forseparating the floating particles from the heavy liquid.5.4 Hot Plate or Oven.5.5 Sieves,300-m(No.50)and 4.75-mm(No.4)conform-ing to Specification E11.5.6 Specific Gravity MeasurementA hydrometer conform-ing to the physical requirement sections for individual hydrom-eters of Specification E100,or a suitable combination ofgraduated glassware
