1、Designation:D44812Standard 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 last revision.A num
2、ber 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 Department of Defense.1.Scope1.1 This classification defines aggregate size number desig-natio
3、ns 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 included in thisstand
4、ard.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 which provide explanato
5、ry material.These notes andfootnotes(excluding those in tables and figures)shall not beconsidered as requirements of the classification.2.Referenced Documents2.1 ASTM Standards:2C136 Test Method for Sieve Analysis of Fine and CoarseAggregatesD8 Terminology Relating to Materials for Roads and Pave-me
6、ntsD75 Practice for Sampling AggregatesE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Terminology3.1 Definition of terms,see Terminology D8.4.Significance and Use4.1 Some contract documents specify certain aggregatesizes for specific uses or may suggest one or more of thesesizes a
7、s 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 of any suitable processused to separate raw ma
8、terial 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.Conformance shall be determined by means of la
9、boratorysieves 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 Practice D75 andtested for grading by Test Met
10、hod 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 Dec.1,2012.Published December 2012.Originallyapproved in 1937.Last previous edition ap
11、proved in 2008 as D448 08.DOI:10.1520/D0448-12.2For 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.Copyright ASTM Inte
12、rnational,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 TABLE 1 Standard Sizes of Processed AggregateSizeNumberNominal Size,SquareOpeningsAmounts Finer than Each Laboratory Sieve(Square Openings),mass percent100-mm(4-in.)90-mm(312-in.)75-mm(3-in.)63-mm(212-in.)50-m
13、m(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-in.).10090 to 10035 to 700 to 15.0 to 5.2463 to 19.0-mm(212to3
14、4-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 t
15、o 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 150 to 5.5725.0 to 4.75-mm(1-in.to No.4).10095 to 100.25 to 60.0 to 100 to 5.619.0 to 9.5-mm(34to38-in.).10090 to 10020 to 550 to 150 to 5.6719.0 to 4.75-mm(34-in.
16、to No.4).10090 to 100.20 to 550 to 100 to 5.6819.0 to 2.36-mm(34-in.to No.8).10090 to 100.30 to 655 to 250 to 100 to 5.712.5 to 4.75-mm(12-in.to No.4).10090 to 10040 to 700 to 150 to 5.7812.5 to 2.36-mm(12-in.to No.8).10090 to 10040 to 755 to 250 to 100 to 5.89.5 to 2.36-mm(38-in.to No.8).10085 to 10010 to 300 to 100 to 5.899.5 to 1.18-mm(38-in.to No.16).10090 to 10020 to 555 to 300 to 100 to 5.94.75 to 1.18-mm(No.4 to No.16).10085 to 10010 to 400 to 100 to 5.104.75-mm(No.4 to 0A).10085 to 100.1
