1、Designation: D 448 03aStandard Classification forSizes of Aggregate for Road and Bridge Construction1This standard is issued under the fixed designation D 448; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisi
2、on. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 desi
3、gnationsand ranges in mechanical analyses for standard sizes of coarseaggregate and screenings for use in the construction andmaintenance of various types of highways and bridges.1.2 With regard to sieve sizes and the size of aggregate asdetermined by the use of testing sieves, the values in inch-po
4、und units are shown for the convenience of the user;however, the standard sieve designation shown in parenthesesis the standard value as stated in Specification E 11.1.3 The text of this standard references notes and footnoteswhich provide explanatory material. These notes and footnotes(excluding th
5、ose in tables and figures) shall not be consideredas requirements of the standard.2. Referenced Documents2.1 ASTM Standards:2C 136 Test Method for Sieve Analysis of Fine and CoarseAggregatesD 75 Practice for Sampling AggregatesE 11 Specification for Wire Cloth and Sieves for TestingPurposes3. Signif
6、icance and Use3.1 Some contract documents specify certain aggregatesizes for specific uses 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.4. Manufacture4.1 Th
7、e standard sizes of aggregate described in this clas-sification are manufactured by means 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.5. Standard Sizes5.1 Standard sizes of coa
8、rse aggregate shall comply with thesizes given in Table 1. All sizes shall be determined by meansof laboratory sieves having square openings and conforming toSpecification E 11.6. Basis of Classification6.1 Classification is based upon the size number and sizeranges shown in Table 1 with the aggrega
9、te sampled inaccordance with Practice D 75 and tested for grading by TestMethod C 136.1This 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, 2
10、003. Published December 2003. Originallyapproved in 1937. Last previous edition approved in 2003 as D 448 03.2For 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 sta
11、ndards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.TABLE1StandardSizesofProcessedAggregateSizeNumberNominalSize,SquareOpeningsAmountsFinerthanEachLaboratorySieve(SquareOpenings),masspercen
12、t100- 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)190to37.5-mm(312to112-in.)10090to100.25to60.0to15.0to5.263to37.5-mm(212to112-in.).10090to10
13、035to700to15.0to5.2463to19.0-mm(212to34-in.).10090to100.25to60.0to100to5.350to25.0-mm(2to1-in.).10090to10035to700to15.0to5.35750to4.75-mm(2-in.toNo.4).10095to100.35to70.10to30.0to5.437.5to19.0-mm(112to34-in.).10090to10020to550to15.0to5.46737.5to4.75-mm(112-in.toNo.4).10095to100.35to70.10to300to5.525
14、.0to12.5-mm.(1to12-in.).10090to10020to550to100to5.5625.0to9.5-mm(1to38-in.).10090to10040to8510to400to150to5.5725.0to4.75-mm(1-in.toNo.4).10095to100.25to60.0to100to5.619.0to9.5-mm(34to38-in.).10090to10020to550to150to5.6719.0to4.75-mm(34-in.toNo.4).10090to100.20to550to100to5.6819.0to2.36-mm(34-in.toNo
15、.8).10090to100.30to655to250to100to5.712.5to4.75-mm(12-in.toNo.4).10090to10040to700to150to5.7812.5to2.36-mm(12-in.toNo.8).10090to10040to755to250to100to5.89.5to2.36-mm(38-in.toNo.8).10085to10010to300to100to5.899.5to1.18-mm(38-in.toNo.16).10090to10020to555to300to100to5.94.75to1.18-mm(No.4toNo.16).10085
16、to10010to400to100to5.104.75-mm(No.4to0A).10085to100.10to30AScreenings.D 448 03a27. Keywords7.1 aggregate standard size; coarse aggregate; screeningsASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users
17、of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every fi
18、ve years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical
19、committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 448 03a3
