1、Designation: D 692/D 692M 09Standard Specification forCoarse Aggregate for Bituminous Paving Mixtures1This standard is issued under the fixed designation D 692/D 692M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of las
2、t revision. A number in parentheses indicates the year of last reapproval.A superscript 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 specification covers crushed stone,
3、 crushedhydraulic-cement concrete, crushed blast-furnace slag, crushedgravel, crushed expanded shale, crushed expanded clay, andcrushed expanded slate suitable for use in bituminous pavingmixtures, as described in Specifications D 3515 or D 4215.NOTE 1Other slags having demonstrated a satisfactory s
4、ervice recordmay be used.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may resul
5、t in non-conformancewith the standard.1.3 The text of this standard references notes and footnoteswhich provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be consideredas requirements of the standard.2. Referenced Documents2.1 ASTM Standards:2C 2
6、9/C 29M Test Method for Bulk Density (“Unit Weight”)and Voids in AggregateC88 Test Method for Soundness of Aggregates by Use ofSodium Sulfate or Magnesium SulfateC 125 Terminology Relating to Concrete and ConcreteAggregatesC 131 Test Method for Resistance to Degradation of Small-Size Coarse Aggregat
7、e by Abrasion and Impact in the LosAngeles MachineC 136 Test Method for Sieve Analysis of Fine and CoarseAggregatesC 294 Descriptive Nomenclature for Constituents of Con-crete AggregatesD8 Terminology Relating to Materials for Roads and Pave-mentsD75 Practice for Sampling AggregatesD 448 Classificat
8、ion for Sizes of Aggregate for Road andBridge ConstructionD 3319 Practice for the Accelerated Polishing of Aggre-gates Using the British WheelD 3515 Specification for Hot-Mixed, Hot-Laid BituminousPaving MixturesD 3665 Practice for Random Sampling of ConstructionMaterialsD 4215 Specification for Col
9、d-Mixed, Cold-Laid Bitumi-nous Paving MixturesD 5821 Test Method for Determining the Percentage ofFractured Particles in Coarse Aggregate3. Terminology3.1 Definitions:3.1.1 For defining aggregate types, see Descriptive Nomen-clature C 294, and Terminology D 8 and C 125.3.1.2 expanded shale, n; expan
10、ded clay, n; expanded slate,nthe product resulting from the expanding of selectedmaterials (shale, clay, or slate) in a rotary kiln at temperaturesover 1000C 1832F.4. Ordering Information4.1 Orders for the material under this specification shallinclude the following information:4.1.1 The specificati
11、on designation and year of issue.4.1.2 The size to be furnished (see 5.2).4.1.3 The quantity required.4.1.4 Use of the coarse aggregate, whether for conventionalmixtures or open-graded friction course mixtures (see 5.4), andwhether for surface courses or base courses (see 5.7),4.1.5 In the case of s
12、ulfate soundness tests (5.6), which saltis to be used.1This specification 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 June 1, 2009. Published June 2009. Origina
13、llyapproved in 1942. Last previous edition approved in 2004 as D 692 00 (2004).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 o
14、nthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.6 Any special requirements.5. Physical Requirements5.1 GeneralThe coarse aggregate shall consist of hard,strong, durable pieces, free of coherent coatings and conf
15、orm-ing to the requirements of this specification.5.2 Grading:5.2.1 The coarse aggregate grading shall conform to therequirements of Classification D 448 for the size numberdesignated, or to another grading as stated in the order (seeNote 2).NOTE 2The coarse aggregate grading to be furnished is depe
16、ndentupon the desired composition of the paving mixture, and whether thegrading to be used in the mixture is achieved with or without blending.Other coarse aggregate gradings may be used provided that the combinedaggregate and filler, when used, will produce a paving mixture thatprovides the desired
17、 characteristics.5.2.2 The size to be used is dependent upon the desiredcomposition of the paving mixture, and the required size orsizes either before or after blending as specified.5.3 Density:5.3.1 SlagAir-cooled blast-furnace-slag coarse aggregate,when tested in size No. 57 or No. 8, shall have a
18、 minimumdensity of 1120 kg/m370 lb/ft3 as determined in accordancewith Test Method C 29/C 29M, rodding procedure.5.3.2 Expanded Shale, Expanded Clay, Expanded SlateThe coarse aggregate, when tested in size No. 57 or No. 8, shallhave a minimum density of 500 kg/m331 lb/ft3 as determinedin accordance
19、with Test Method C 29/C 29M, shoveling pro-cedure.5.4 Crushed Pieces in AggregateOrders for materialsunder this specification shall state the appropriate requirementsfor crushed pieces, Test Method D 5821.5.4.1 Conventional MixturesNot less than 40 %, by mass,of the aggregate pieces retained on the
20、4.75-mm No. 4 sieveshall have at least one fractured face (see Notes 3 and 4).5.4.2 Open Graded Friction Course MixturesOf the ag-gregate pieces retained on the 4.75-mm No. 4 sieve, not lessthan 90 %, by mass, shall have one or more fractured faces and75 %, by mass, two or more fractured faces.NOTE
21、3Attention is called to the distinction between conventional(dense mixtures or open mixtures) and open-graded friction coursemixtures in Specification D 3515.NOTE 4Some sources of aggregate contain angular particles that willperform similarly to a mechanically crushed particle. Where laboratorytests
22、 or service records indicate this to be true, such angular particles maybe considered as crushed.5.5 Polishing CharacteristicsThe coarse aggregates, orthe coarsest fraction of the aggregate for use in surface coursemixtures, shall be of a type known to possess adequateresistance to the polishing act
23、ion of the anticipated traffic. (seeNote 5)NOTE 5No standard ASTM method has been recognized to becapable of defining adequate resistance to the polishing action of specifictraffic conditions. Test Method D 3319 has been found useful in evaluatingthe relative polish resistance between samples of dif
24、ferent aggregates ormixtures containing different aggregates.5.6 SoundnessThe coarse aggregate, when subjected tofive cycles of the soundness test, shall have a weighted loss notgreater than 12 % when sodium sulfate is used or 18 % whenmagnesium sulfate is used. (see Note 6). If the salt is notdesig
25、nated by the purchaser, the aggregate will be acceptable ifit meets the indicated limit for the salt used.5.7 DegradationThe aggregate (with the exception ofcrushed blast-furnace slag) when subjected to testing in accor-dance with Test Method C 131 shall have a loss not greaterthan 40 % for surface
26、courses or 50 % for base courses (seeNote 6).NOTE 6Coarse aggregate (other than crushed hydraulic-cement con-crete) failing to meet the requirements of 5.6 or 5.7, may be considered foruse provided that (a) similar aggregates from the same source or geologicformation have been shown by experience to
27、 result in satisfactorypavements and (b) the results of other tests suggest that the desiredperformance can be obtained. Aggregate from a new source (includingcrushed hydraulic-cement concrete) that fails the requirements of 5.6 or5.7 and for which no experience exists, may be considered provided th
28、eresults of the other tests suggest that the desired performance can beobtained. Crushed hydraulic-cement concrete may chemically react withNa2SO4or MgSO4, giving higher results which may not reflect theaggregates freeze-thaw properties. Additional tests may be required.6. Methods of Sampling and Te
29、sting6.1 Sample the aggregates and determine the propertiesenumerated in this specification in accordance with the follow-ing methods:6.1.1 SamplingPractice D75and Practice D 3665.6.1.2 GradingTest Method C 136.6.1.3 Bulk Density of AggregateTest Method C 29/C 29M.6.1.4 SoundnessTest Method C88.6.1.
30、5 DegradationTest Method C 131.7. Keywords7.1 aggregate; bituminous paving; coarse aggregate; opengraded friction; paving mixturesD 692/D 692M 092ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of
31、 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 five
32、 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 co
33、mmittee, 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 692/D 692M 093
