1、Designation: D692/D692M 15Standard 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, the year of last re
2、vision. 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, crushedgravel, crushed
3、 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 inch-pound unitsar
4、e 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 references notes an
5、d 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 AggregateC88 Test Method
6、 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 Sieve Analysis of
7、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 for the Accelerated
8、 Polishing of AggregatesUsing the British WheelD3515 Specification for Hot-Mixed, Hot-Laid BituminousPaving Mixtures (Withdrawn 2009)3D3665 Practice for Random Sampling of Construction Ma-terialsD4215 Specification for Cold-Mixed, Cold-Laid BituminousPaving MixturesD5821 Test Method for Determining
9、the Percentage ofFractured Particles in Coarse Aggregate3. Terminology3.1 For defining aggregate types, see Descriptive Nomen-clature C294, and Terminology D8 and C125.3.2 Definitions:3.2.1 expanded shale, n; expanded clay, n; expanded slate,nthe product resulting from the expanding of selectedmater
10、ials (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 (see 5.2).4.1.3 The qu
11、antity 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 special requirements.1
12、This 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, 2015. Published July 2015. Originally approvedin 1942. Last previous edition approved in
13、2014 as D692/D692M 09 (2014). DOI:10.1520/D0692_D0692M-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.3Th
14、e last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15. Physical Requirements5.1 GeneralThe coarse aggregate shall consist of hard,strong, durable pieces, fre
15、e of coherent coatings and conform-ing to the requirements of this specification.5.2 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 coarse aggregate g
16、rading 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 produce a paving mi
17、xture 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,when tested in size
18、 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 500 kg/m331 lb/ft3
19、 as determinedin accordance with Test Method C29/C29M, shoveling proce-dure.5.4 Fractured Particles in Coarse AggregateOrders formaterials under this specification shall state the appropriaterequirements for fractured particles.5.4.1 Conventional MixturesNot less than 40 %, by mass,of the aggregate
20、particles retained on the 4.75-mm No. 4sieve shall have at least one fractured face (see Notes 3 and 4).5.4.2 Open Graded Friction Course MixturesOf the ag-gregate particles retained on the 4.75-mm No. 4 sieve, notless than 90 %, by mass, shall have one or more fractured facesand 75 %, by mass, two
21、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 mechanically fractured p
22、article. Where laboratorytests or service records indicate this to be true, such angular particles maybe considered as fractured.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 adequat
23、eresistance 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 polish res
24、istance 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 used. (see No
25、te 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 a loss not
26、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 geologicformation ha
27、ve 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 experience exists,
28、 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 be required
29、.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/C29M.6.1.4 So
30、undnessTest Method C88.6.1.5 DegradationTest Method C131.6.1.6 Fractured ParticlesTest Method D5821.7. Keywords7.1 aggregate; bituminous paving; coarse aggregate; opengraded friction; paving mixturesASTM International takes no position respecting the validity of any patent rights asserted in connect
31、ion with any item mentionedin 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 responsibl
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