1、Designation: D692/D692M 09 (Reapproved 2014)Standard Specification forCoarse Aggregate for Bituminous Paving Mixtures1This standard is issued under the fixed designation D692/D692M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, t
2、he year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers crushed stone, crushedhydraulic-cement concrete, crushed blast-furnace slag, crus
3、hedgravel, crushed expanded shale, crushed expanded clay, andcrushed expanded slate suitable for use in bituminous pavingmixtures, as described in Specifications D3515 or D4215.NOTE 1Other slags having demonstrated a satisfactory service recordmay be used.1.2 The values stated in either SI units or
4、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 result in non-conformancewith the standard.1.3 The text of this standard r
5、eferences 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:2C29/C29M Test Method for Bulk Density (“Unit Weight”)and Voids in Aggreg
6、ateC88 Test Method for Soundness of Aggregates by Use ofSodium Sulfate or Magnesium SulfateC125 Terminology Relating to Concrete and Concrete Ag-gregatesC131 Test Method for Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the LosAngeles MachineC136 Test Method for
7、Sieve Analysis of Fine and CoarseAggregatesC294 Descriptive Nomenclature for Constituents of Con-crete AggregatesD8 Terminology Relating to Materials for Roads and Pave-mentsD75 Practice for Sampling AggregatesD448 Classification for Sizes of Aggregate for Road andBridge ConstructionD3319 Practice f
8、or the Accelerated Polishing of AggregatesUsing the British WheelD3515 Specification for Hot-Mixed, Hot-Laid BituminousPaving Mixtures (Withdrawn 2009)3D3665 Practice for Random Sampling of Construction Ma-terialsD4215 Specification for Cold-Mixed, Cold-Laid BituminousPaving MixturesD5821 Test Metho
9、d for Determining the Percentage ofFractured Particles in Coarse Aggregate3. Terminology3.1 Definitions:3.1.1 For defining aggregate types, see Descriptive Nomen-clature C294, and Terminology D8 and C125.3.1.2 expanded shale, n; expanded clay, n; expanded slate,nthe product resulting from the expand
10、ing 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 specification designation and year of issue.4.1.2 The size to be furnished (s
11、ee 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 sulfate soundness tests (5.6), which saltis to be used.4.1.6 Any sp
12、ecial requirements.5. Physical Requirements5.1 GeneralThe coarse aggregate shall consist of hard,strong, durable pieces, free of coherent coatings and conform-ing to the requirements of this specification.1This specification is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials
13、 and is the direct responsibility of Subcommittee D04.50 onAggregate Specifications.Current edition approved June 1, 2014. Published October 2014. Originallyapproved in 1942. Last previous edition approved in 2009 as D692/D692M 09.DOI: 10.1520/D0692_D0692M-09R14.2For referenced ASTM standards, visit
14、 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM
15、 International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.2 Grading:5.2.1 The coarse aggregate grading shall conform to therequirements of Classification D448 for the size numberdesignated, or to another grading as stated in the order (seeNote 2).NOTE 2The
16、 coarse aggregate grading to be furnished is dependentupon 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
17、produce a paving mixture thatprovides the desired 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,
18、when tested in size No. 57 or No. 8, shall have a minimumdensity of 1120 kg/m370 lb/ft3 as determined in accordancewith Test Method C29/C29M, 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
19、 500 kg/m331 lb/ft3 as determinedin accordance with Test Method C29/C29M, shoveling proce-dure.5.4 Crushed Pieces in AggregateOrders for materialsunder this specification shall state the appropriate requirementsfor crushed pieces, Test Method D5821.5.4.1 Conventional MixturesNot less than 40 %, by m
20、ass,of the aggregate pieces retained on the 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 %
21、, by mass, two or more fractured faces.NOTE 3Attention is called to the distinction between conventional(dense mixtures or open mixtures) and open-graded friction coursemixtures in Specification D3515.NOTE 4Some sources of aggregate contain angular particles that willperform similarly to a mechanica
22、lly crushed particle. Where laboratorytests 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 poss
23、ess adequateresistance to the polishing action of the anticipated traffic. (seeNote 5)NOTE 5No standardASTM method has been recognized to be capableof defining adequate resistance to the polishing action of specific trafficconditions. Test Method D3319 has been found useful in evaluating therelative
24、 polish resistance between samples of different 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 us
25、ed. (see Note 6). If the salt is notdesignated 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 C131 shall have
26、a loss not greater than40 % for surface courses or 50 % for base courses (see Note 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 geologicf
27、ormation have been shown by experience to 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 experie
28、nce exists, may be considered provided theresults 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
29、be required.6. Methods of Sampling and Testing6.1 Sample the aggregates and determine the propertiesenumerated in this specification in accordance with the follow-ing methods:6.1.1 SamplingPractice D75 and Practice D3665.6.1.2 GradingTest Method C136.6.1.3 Bulk Density of AggregateTest Method C29/C2
30、9M.6.1.4 SoundnessTest Method C88.6.1.5 DegradationTest Method C131.7. Keywords7.1 aggregate; bituminous paving; coarse aggregate; opengraded friction; paving mixturesASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin th
31、is 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 committee and must b
32、e 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 meeting of theres
33、ponsible 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 Box C700, W
34、est 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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 09 (2014)2
