FIELD TESTS FOR COMPACTED ROCKFILL

The limitations of vibratory rolling are reviewed and field tests that are required for the design of rock fills, including test quarries, test fills, field density tests, grain-size analysis and relative density tests are described. The chief limitation of the vibratory roller is that the vibrations are applied to the top surface of the layer being rolled, giving the roller a limited ability to compact at depth. Also, it must travel in a forward direction to achieve best compaction. The importance is emphasized of the test quarry in a test program. The separation of spalls and sand-size material from the coarser rock by a grizzly operation, has advantaged during construction. The equipment required for construction of rockfill test sections includes a front end loader or power shovel, trucks, a caterpillar tractor with a bulldozer blade, and rollers. The layout of test fills is detailed. Rockfill compaction is evaluated in terms of the percentage decrease in thickness of a layer under repeated roller passes. The procedure for conducting tests is described, as well as the evaluation of data. It is highly desirable to make comparative tests of the merits of the different types of vibratory rollers available, and a method is described that was devised for making direct comparison between a 10-and 12:5-ton roller. Construction control tests, field density tests, maximum density determination, and grain size determination are detailed and typical results are discussed. Specifications for construction control are also discussed.

  • Corporate Authors:

    John Wiley & Sons, Incorporated

    111 River Street
    Hoboken, NJ  USA  07030-6000
  • Authors:
    • Bertram, G E
  • Publication Date: 1973

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Filing Info

  • Accession Number: 00096412
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 15 1975 12:00AM