TESTS FOR EVALUATING DEGRADATION OF BASE COURSE AGGREGATES

A STUDY WAS UNDERTAKEN TO DEVELOP PROCEDURES FOR PREDICTING THE AMOUNT AND EFFECTS OF DEGRADATION FOR DIFFERENT NATURAL AGGREGATES WHEN USED IN A ROADWAY BASE OR SUBBASE COURSE, AND THEREBY FOR DETERMINING THEIR SUITABILITY, AGGREGATE SAMPLES WERE COLLECTED FROM 140 QUARRIES IN 12 STATES, DIVIDED INTO FOUR CLASSES (CARBONATES AND CLASTIC SEDIMENTARIES, COARSE-GRAINED IGNEOUS AND METAMORPHICS, BASALTS AND BASALT-LIKE ROCKS, AND HETEROGENOUS GRAVELS), AND SUBMITTED TO EIGHT TESTS: PERCENT LOSS, LOS ANGELES ABRASION; FREEZE-THAW LOSS; SPECIFIC GRAVITY, PERCENT ABSORPTION; INSOLUBLE RESIDUE; DIFFERENTIAL THERMAL ANALYSIS; X-RAY DIFFRACTION ANALYSIS; AND PETROGRAPHIC ANALYSIS, INCLUDING A BATTERY OF TESTS FOR POLISHED AND THIN SECTION. TEST CONCLUSIONS REGARDING THE FOUR CLASSES ARE GIVEN AND DISCUSSED, AND DETAILED DATA ON SAMPLES ARE TABULATED IN APPENDICES.

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    • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved. 92 PP, FIG, TAB, PHOT, 9 APP
  • Authors:
    • West, T R
    • Johnson, R B
    • Smith, N M
  • Publication Date: 1970

Media Info

  • Media Type: Digital/other
  • Serial:
    • NCHRP Report
    • Issue Number: 98
    • Publisher: Transportation Research Board
    • ISSN: 0077-5614
  • Publication flags:

    Open Access (libre)

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Filing Info

  • Accession Number: 00217848
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Dec 28 1970 12:00AM