The use of spent oil shale material as aggregate for flexible pavement construction was investigated, and its suitability for use both in base courses and in bituminous surface courses is discussed. To assess the aggregate and asphalt-aggregate characteristics of spent shale the following tests were performed: the Los Angeles abrasion test, the dry sieve analysis, the specific gravity test, the Atterberg limits test, and the Hveem method of mix design. The results of the testing showed that the spent shale aggregate was well-graded, flat, angular, highly absorbent, friable, and nonplastic, has a rough surface texture, and wears relatively easily. The aggregate mixes tested by the Hveem stabilometer yielded high strength values and were relatively lightweight. The asphalt-spent shale mixtures studied showed very high total resistance (combination of stability and cohesiometer values) values, i.e., more than adequate load-carrying capability. However, the asphalt contents necessary for these very high strengths were also high. Based on the results of the tests performed, it seems apparent that this particular type of spent shale material might perform very well in flexible pavement structures. Although the material showed more than adequate strength and stability, it may not stand up as well to the abrasive action of traffic on high-capacity roads and may be expensive because of the seemingly large amount of asphalt needed. However, this mixture might perform very well as a surface course layer for lower capacity roads (e.g., secondary roads).

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 47-54
  • Monograph Title: Bituminous mixtures, aggregates, and pavements
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00129486
  • Record Type: Publication
  • ISBN: 0309024544
  • Files: TRIS, TRB
  • Created Date: Mar 10 1976 12:00AM