1、Designation:D124115Standard Specification forMaterials for Soil-Aggregate Subbase,Base,and SurfaceCourses1This standard is issued under the fixed designation D1241;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revi
2、sion.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.Scope*1.1 This specification covers the quality and grad
3、ing of thefollowing materials for use in the construction of subbase,base,and surface courses:sand-clay mixtures;gravel;stone orslag screenings;sand;crusher-run coarse aggregate consistingof gravel,crushed stone,or slag combined with soil mortar;orany combination of these materials.The requirements
4、areintended to cover materials having normal specific gravity,absorption,and gradation characteristics.Where other materi-als are to be used,appropriate limits suitable to their use mustbe specified.1.2 UnitsThe values stated in SI units are to be regardedas standard.The sieve designations are ident
5、ified using the“standard”system in accordance with Specification E11,suchas 25-mm and 75-m,followed by the“alternative”system of1-in.and No.200,respectively.Use of the“alternative”systemshall not be regarded as nonconformance with this standard.1.3 The following precautionary caveat pertains only to
6、 theTest Methods portion,Section 9,of this specification.Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regu
7、latory limita-tions prior to use.2.Referenced Documents2.1 ASTM Standards:2C117 Test Method for Materials Finer than 75-m(No.200)Sieve in Mineral Aggregates by WashingC131 Test Method for Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the LosAngeles MachineC136 Te
8、st Method for Sieve Analysis of Fine and CoarseAggregatesD75 Practice for Sampling AggregatesD421 Practice for Dry Preparation of Soil Samples forParticle-Size Analysis and Determination of Soil Con-stantsD653 Terminology Relating to Soil,Rock,and ContainedFluidsD3740 Practice for Minimum Requiremen
9、ts for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4318 Test Methods for Liquid Limit,Plastic Limit,andPlasticity Index of SoilsD4700 Guide for Soil Sampling from the Vadose ZoneE11 Specification for Woven Wire Test Sieve Cloth and Test
10、Sieves3.Terminology3.1 DefinitionsSee Terminology D653 for general defini-tions.4.Types4.1 The following types of mixtures are specified:4.1.1 Type IMixtures shall consist of stone,gravel,or slagwith natural or crushed sand and fine mineral particles passinga 75-m(No.200)sieve and shall conform to t
11、he requirementsof Table 1 for Gradation A,B,C,or D.4.1.2 Type IIMixtures shall consist of natural or crushedsand with fine mineral particles passing a 75-m(No.200)sieve,with or without stone,gravel,or slag,and shall conformto the requirements of Table 1 for Gradation E or F.5.General Requirements5.1
12、 Coarse AggregateCoarse aggregate,retained on a4.75 mm(No.4)sieve,for use in Type I and Type II mixtures,shall consist of hard,durable,and sound particles or fragmentsof stone,gravel,or slag.Coarse aggregate shall have abrasionloss,determined by Test Method C131,of not more than 50percent.1This spec
13、ification is under the jurisdiction of ASTM Committee D18 on Soiland Rock and is the direct responsibility of Subcommittee D18.08 on Special andConstruction Control Tests.Current edition approved Nov.1,2015.Published November 2015.Originallyapproved in 1952.Last previous edition approved in 2007 as
14、D1241 07.DOI:10.1520/D1241-15.2For 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.*A Summary of Changes section appear
15、s at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE1A higher or lower abrasion loss may be specified by theengineer,depending upon the materials available for the work.5.2 Fine AggregateFine aggregate,passing
16、 a 4.75 mm(No.4)sieve,for use in Type I and Type II mixtures,shallconsist of natural or crushed sand and fine mineral particlespassing the 75-m(No.200)sieve.The fraction passing the75-m(No.200)sieve shall not be greater than two thirds ofthe fraction passing the 425-m(No.40)sieve as determinedby Test Methods C117 and C136.The fraction passing the425-m(No.40)sieve shall have a liquid limit not greater than25 and a plasticity index not greater than 6 as determined byTest Method D4318.5.3 The compo