The standard Proctor test for gravelly sand (24% gravel, 76% sand) to be used as a base course (a soil layer above the existing soil) of a highway embankment is shown in the following Figure.    a) Specify the compaction criteria for the field (dry of OMC or wet of OMC) b) Recommend field compaction equipment that would achieve the desired compaction. c) Specify an appropriate quality control test.

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