1、Designation: D448 08 D448 12Standard 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 r
2、evision. 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 Department of Defense.1. Scope1.1 This classification defines aggregate size
3、number designations and standard size ranges for mechanical sieve analyses ofcoarse aggregate and screenings for use in the construction and maintenance of various types of highways and bridges.1.2 UnitsThe values stated in SI units are to be regarded as the standard. The values given in parentheses
4、 are for informationonly.standard. No other units of measurement are included in this standard.NOTE 1Sieve size is identified by its standard designation in Specification E11. The alternative designation given in parentheses is for informationonly and does not represent a different standard sieve si
5、ze.1.3 The text of this classification references notes and footnotes which provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be considered as requirements of the classification.2. Referenced Documents2.1 ASTM Standards:2C136 Test Method for Sie
6、ve Analysis of Fine and Coarse AggregatesD8 Terminology Relating to Materials for Roads and PavementsD75 Practice for Sampling AggregatesE11 Specification for Woven Wire Test Sieve Cloth and Test Sieves3. Terminology3.1 Definition of terms, see Terminology D8.4. Significance and Use4.1 Some contract
7、 documents specify certain aggregate sizes for specific uses or may suggest one or more of these sizes asappropriate for the preparation of various end-product mixtures. In some cases, closer limits on variability of the aggregate gradingare required.5. Manufacture5.1 The standard sizes of aggregate
8、 described in this classification are manufactured by means of any suitable process used toseparate raw material into the desired size ranges. Production of standard sizes by blending two or more different components ispermitted.6. Standard Sizes6.1 Standard aggregate sizes shall conform to the requ
9、irements prescribed in Table 1 for the size number specified.Conformance shall be determined by means of laboratory sieves having square openings and conforming to Specification E11.1 This classification is under the jurisdiction of ASTM Committee D04 on Road and Paving Materials and is the direct r
10、esponsibility of Subcommittee D04.50 on AggregateSpecifications.Current edition approved July 1, 2008Dec. 1, 2012. Published July 2008December 2012. Originally approved in 1937. Last previous edition approved in 20032008 asD448 03a.D448 08. DOI: 10.1520/D0448-08.10.1520/D0448-12.2 For referenced AST
11、M standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user
12、 of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as
13、published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1TABLE 1 Standard Sizes of Processed AggregateSizeNumberNominal Size,SquareOpeningsAmounts Finer than Each Laboratory Sieve (Sq
14、uare Openings), mass percent100-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)1 90 to 37.5-mm(312 to 112-in.)100 90 to 100 . 25 to 60 . 0 to 15
15、 . 0 to 5 . . . . . . .2 63 to 37.5-mm(212 to 112-in.). . 100 90 to 100 35 to 70 0 to 15 . 0 to 5 . . . . . . .24 63 to 19.0-mm(212 to 34-in.). . 100 90 to 100 . 25 to 60 . 0 to 10 0 to 5 . . . . . .3 50 to 25.0-mm(2 to 1-in.). . . 100 90 to 100 35 to 70 0 to 15 . 0 to 5 . . . . . .357 50 to 4.75-mm
16、(2-in. to No. 4). . . 100 95 to 100 . 35 to 70 . 10 to 30 . 0 to 5 . . . .4 37.5 to 19.0-mm(112 to 34-in.). . . . 100 90 to 100 20 to 55 0 to 15 . 0 to 5 . . . . .467 37.5 to 4.75-mm(112-in. to No. 4). . . . 100 95 to 100 . 35 to 70 . 10 to 30 0 to 5 . . . .5 25.0 to 12.5-mm.(1 to 12-in.). . . . . 1
17、00 90 to 100 20 to 55 0 to 10 0 to 5 . . . . .56 25.0 to 9.5-mm(1 to 38-in.). . . . . 100 90 to 100 40 to 85 10 to 40 0 to 15 0 to 5 . . . .57 25.0 to 4.75-mm(1-in. to No. 4). . . . . 100 95 to 100 . 25 to 60 . 0 to 10 0 to 5 . . .6 19.0 to 9.5-mm(34 to 38-in.). . . . . . 100 90 to 100 20 to 55 0 to
18、 15 0 to 5 . . . .67 19.0 to 4.75-mm(34-in. to No. 4). . . . . . 100 90 to 100 . 20 to 55 0 to 10 0 to 5 . . .68 19.0 to 2.36-mm(34-in. to No. 8). . . . . . 100 90 to 100 . 30 to 65 5 to 25 0 to 10 0 to 5 . .7 12.5 to 4.75-mm(12-in. to No. 4). . . . . . . 100 90 to 100 40 to 70 0 to 15 0 to 5 . . .7
19、8 12.5 to 2.36-mm(12-in. to No. 8). . . . . . . 100 90 to 100 40 to 75 5 to 25 0 to 10 0 to 5 . .8 9.5 to 2.36-mm(38-in. to No. 8). . . . . . . . 100 85 to 100 10 to 30 0 to 10 0 to 5 . .89 9.5 to 1.18-mm(38-in. to No. 16). . . . . . . . 100 90 to 100 20 to 55 5 to 30 0 to 10 0 to 5 .9 4.75 to 1.18-
20、mm(No. 4 to No. 16). . . . . . . . . 100 85 to 100 10 to 40 0 to 10 0 to 5 .10 4.75-mm(No. 4 to 0A ). . . . . . . . . 100 85 to 100 . . . 10 to30A Screenings.D4481227. Basis of Classification7.1 Classification of an aggregate is based upon the size number designation and size ranges shown in Table 1
21、. Aggregate shallbe sampled in accordance with Practice D75 and tested for grading by Test Method C136.D448 1238. Keywords8.1 aggregate standard size; coarse aggregate; screeningsASTM International takes no position respecting the validity of any patent rights asserted in connection with any item me
22、ntionedin this standard. Users 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 committe
23、e and must be reviewed every five 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 meeti
24、ng of theresponsible technical 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
25、 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D448 124
