A test that checks whether soil has been packed tightly enough to meet the strength and density required by the project specifications.
A field or laboratory test performed to verify that compacted fill material meets the specified density requirements for the project. The standard Proctor test (ASTM D698) or modified Proctor test (ASTM D1557) establishes the maximum dry density and optimum moisture content in the lab; field testing uses a nuclear density gauge or sand cone to measure actual density. Results are expressed as a percentage of maximum Proctor density.
The contractor was required to perform one compaction test per 2,500 square feet of fill placed, with results submitted to the engineer within 24 hours.
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