In North Dakota the spec for earthwork requires that all soil be at or 5 percent over optimum moisture as determined by the 5 pt proctor. Also must meet 90 percent of the maximum dry density. Is this a bogus spec? The contractor is able to meet density even when the material is 1-2 percent under optimum moisture. I know other states have an over/under range of acceptable moisture content. Is this a big deal, enough to justify making the contractor scarify and water a compacted and hardened fill? I know they will make a big deal about it and i want some justification to make them do it rather than just adhering to a number in a book. None of this material is even being paved; its just for a widening of a gravel shoulder.
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