1、Designation:D44812(Reapproved 2017)Standard Classification forSizes of Aggregate for Road and Bridge Construction1This standard is issued under the fixed designation D448;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of la
2、st revision.A number 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 classification defines aggregate si
3、ze number desig-nations and standard size ranges for mechanical sieve analysesof coarse aggregate and screenings for use in the constructionand maintenance of various types of highways and bridges.1.2 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are
4、included in thisstandard.NOTE1Sieve 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 classification references notes andfootnotes wh
5、ich provide explanatory material.These notes andfootnotes(excluding those in tables and figures)shall not beconsidered as requirements of the classification.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the
6、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:2C136 Test Method for Sieve Analysis of Fine and CoarseAggregatesD8 Terminology Re
7、lating to Materials for Roads and Pave-mentsD75 Practice for Sampling AggregatesE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Terminology3.1 For definitions of terms,see Terminology D8.4.Significance and Use4.1 Some contract documents specify certain aggregatesizes for specific u
8、ses or may suggest one or more of thesesizes as appropriate for the preparation of various end-productmixtures.In some cases,closer limits on variability of theaggregate grading are required.5.Manufacture5.1 The standard sizes of aggregate described in this clas-sification are manufactured by means
9、of any suitable processused to separate raw material into the desired size ranges.Production of standard sizes by blending two or more differentcomponents is permitted.6.Standard Sizes6.1 Standard aggregate sizes shall conform to the require-ments prescribed in Table 1 for the size number specified.
10、Conformance shall be determined by means of laboratorysieves having square openings and conforming to SpecificationE11.7.Basis of Classification7.1 Classification of an aggregate is based upon the sizenumber designation and size ranges shown in Table 1.Aggre-gate shall be sampled in accordance with
11、Practice D75 andtested for grading by Test Method C136.1This classification is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.50 onAggregate Specifications.Current edition approved Oct.1,2017.Published October 2017.Origin
12、allyapproved in 1937.Last previous edition approved in 2012 as D448 12.DOI:10.1520/D0448-12R17.2For 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 Sum
13、mary page onthe ASTM website.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 Decision on Principles for
14、 theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 TABLE 1 Standard Sizes of Processed AggregateSizeNumberNominal Size,SquareOpeningsAmounts Finer than Each Laboratory Sieve(Square Openings),mass pe
15、rcent100-mm(4-in.)90-mm(312-in.)75-mm(3-in.)63-mm(212-in.)50-mm(2-in.)37.5-mm(112-in.)25.0-mm(1-in.)19.0-mm(34-in.)12.5-mm(12-in.)9.5-mm(38-in.)4.75-mm(No.4)2.36-mm(No.8)1.18-mm(No.16)300-m(No.50)150-m(No.100)190 to 37.5-mm(312to 112-in.)10090 to 100.25 to 60.0 to 15.0 to 5.263 to 37.5-mm(212to 112-
16、in.).10090 to 10035 to 700 to 15.0 to 5.2463 to 19.0-mm(212to34-in.).10090 to 100.25 to 60.0 to 100 to 5.350 to 25.0-mm(2 to 1-in.).10090 to 10035 to 700 to 15.0 to 5.35750 to 4.75-mm(2-in.to No.4).10095 to 100.35 to 70.10 to 30.0 to 5.437.5 to 19.0-mm(112to34-in.).10090 to 10020 to 550 to 15.0 to 5.46737.5 to 4.75-mm(112-in.to No.4).10095 to 100.35 to 70.10 to 300 to 5.525.0 to 12.5-mm.(1 to12-in.).10090 to 10020 to 550 to 100 to 5.5625.0 to 9.5-mm(1 to38-in.).10090 to 10040 to 8510 to 400 to 1
