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    Relative Density Tests on Rock Fill at Carters Dam

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    During the construction of Carters Dam, 126 relative density tests were performed on specimens selected from over 200 in-place density tests made throughout four zones of the compacted fill in the dam. Each specimen was dug from the compacted fill and was approximately one cubic yard in volume. The material varied from weathered rock to sound fresh quartzite with up to 36-in. maximum particle size. The relative density of the compacted fill was seldom less than 100 percent, and in many instances, it substantially exceeded the maximum vibrated test density. All of the material in each specimen was graded to determine the grain size distribution. This series of tests indicated further development in equipment and procedures is needed to obtain laboratory densities for rock fill that are comparable to the densities achieved in the field with vibratory rollers. Valuable experience was gained through the problems and utilization of large scale density tests of rock fill material.


    cohesionless soils, construction, dams, field tests, earth fills, rock fill dams, soil mechanics, tests, density (mass/volume)

    Author Information:

    Stephenson, RJ
    Director, South Atlantic Division Laboratory, U. S. Army Corps of Engineers, Marietta, Ga.

    Committee/Subcommittee: D18.92

    DOI: 10.1520/STP37876S