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.

  • Availability:
  • Supplemental Notes:
    • 92 PP, FIG, TAB, PHOT, 9 APP
  • Authors:
    • West, T R
    • Johnson, R B
    • Smith, N M
  • Publication Date: 1970

Media Info

  • Serial:
    • NCHRP Report
    • Issue Number: 98
    • Publisher: Transportation Research Board
    • ISSN: 0077-5614

Subject/Index Terms

Filing Info

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