1、Designation:C125217Standard Test Methods forUncompacted Void Content of Fine Aggregate(asInfluenced by Particle Shape,Surface Texture,andGrading)1This standard is issued under the fixed designation C1252;the number immediately following the designation indicates the year oforiginal adoption or,in th
2、e case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods cover the determination of the loose,uncompacted void content of a sample
3、 of fine aggregate.Whenmeasured on any aggregate of a known grading,void contentprovides an indication of that aggregates angularity,sphericity,and surface texture compared with other fine aggre-gates tested in the same grading.When void content ismeasured on an as-received fine-aggregate grading,it
4、 can be anindicator of the effect of the fine aggregate on the workabilityof a mixture in which it may be used.1.2 Three procedures are included for the measurement ofvoid content.Two use graded fine aggregate(standard gradingor as-received grading),and the other uses several individualsize fraction
5、s for void content determinations:1.2.1 Standard Graded Sample(Test Method A)This testmethod uses a standard fine aggregate grading that is obtainedby combining individual sieve fractions from a typical fineaggregate sieve analysis.See the Section 9 for the grading.1.2.2 Individual Size Fractions(Te
6、st Method B)This testmethod uses each of three fine aggregate size fractions:(a)2.36 mm(No.8)to 1.18 mm(No.16);(b)1.18 mm(No.16)to 600 m(No.30);and(c)600 m(No.30)to 300 m(No.50).For this test method,each size is tested separately.1.2.3 As-Received Grading(Test Method C)This testmethod uses that port
7、ion of the fine aggregate finer than a4.75-mm(No.4)sieve.1.2.4 See the section on Significance and Use for guidanceon the method to be used.1.3 The values stated in SI units shall be regarded as thestandard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated wit
8、h 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.1.5 This international standard was developed in accor-dance with internationally recognized principles on stan
9、dard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2B88 Specification for Seamless Copper Water TubeB
10、88M Specification for Seamless Copper Water Tube(Met-ric)C29/C29M Test Method for Bulk Density(“Unit Weight”)and Voids in AggregateC117 Test Method for Materials Finer than 75-m(No.200)Sieve in Mineral Aggregates by WashingC125 Terminology Relating to Concrete and Concrete Ag-gregatesC128 Test Metho
11、d for Relative Density(Specific Gravity)and Absorption of Fine AggregateC136 Test Method for Sieve Analysis of Fine and CoarseAggregatesC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC702 Practice for Reducing Samples ofAggregate to TestingSizeC77
12、8 Specification for Standard SandD75 Practice for Sampling Aggregates2.2 ACI Document:ACI 116R Cement and Concrete Terminology33.Terminology3.1 Terms used in these test methods are defined in Termi-nology C125 or ACI 116R.1These test methods are under the jurisdiction of ASTM Committee D04 onRoad an
13、d Paving Materials and are the direct responsibility of SubcommitteeD04.51 on Aggregate Tests.Current edition approved May 1,2017.Published May 2017.Originallyapproved in 1993.Last previous edition approved in 2006 as C1252 06 which waswithdrawn January 2015 and reinstated May 2017.DOI:10.1520/C1252
14、-17.2For 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 American Concrete Institute(ACI),P.O.Box 9094,
15、FarmingtonHills,MI 48333-9094,http:/www.aci-int.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Dec
16、ision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.Summary of Test Method4.1 A nominal 100-mL calibrated cylindrical measure isfilled with fine aggregate of prescribed grading by allowing thesample to flow through a funnel from a fixed height into themeasure.The fine aggregate is struck off and its mass isdetermined by weighing.Uncompacted void content is calcu-lated as
