More D The aggregates shall consist of hard, strong, durable pieces, free of coherent coatings. They shall be sampled for testing, and shall conform to physical requirements as to bulk density, composition for both conventional and open graded friction course mixtures, polishing characteristics, soundness, and degradation behavior. This abstract is a brief summary of the referenced standard.
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A number in parentheses indicates the year of last reapproval. NOTE 1—Other slags having demonstrated a satisfactory service recordmay be used. 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. These notes and footnotes excluding those in tables and figures shall not be consideredas requirements of the standard. Referenced Documents2. Ordering Information4. Current edition approved June 1, Published July Originally approvedin United States Physical Requirements5.
NOTE 2—The 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 produce a paving mixture thatprovides the desired characteristics. NOTE 3—Attention is called to the distinction between conventional dense mixtures or open mixtures and open-graded friction coursemixtures in Specification D NOTE 4—Some sources of aggregate contain angular particles that willperform similarly to a mechanically fractured particle.
Where laboratorytests or service records indicate this to be true, such angular particles maybe considered as fractured. Test Method D has been found useful in evaluating therelative polish resistance between samples of different aggregates ormixtures containing different aggregates. If the salt is notdesignated by the purchaser, the aggregate will be acceptable ifit meets the indicated limit for the salt used. NOTE 6—Coarse aggregate other than crushed hydraulic-cement con-crete failing to meet the requirements of 5.
Aggregate from a new source includingcrushed hydraulic-cement concrete that fails the requirements of 5. Additional tests may be required. Methods of Sampling and Testing6. 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 be reviewed every five years andif not revised, either reapproved or withdrawn.
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Your comments will receive careful consideration at a meeting 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.