SC Concrete Paving Practice Questions - South Carolina Concrete Paving Contractor Examination Exam

Which statement best describes the difference between standard Proctor (ASTM D698) and modified Proctor (ASTM D1557)?

Modified Proctor uses higher compactive energy, producing a higher maximum dry density and a lower optimum moisture Standard Proctor is only for concrete; modified Proctor is only for asphalt The two tests always give the same maximum dry density Modified Proctor measures slump of cement-stabilized soil

Correct Answer:

Modified Proctor uses higher compactive energy, producing a higher maximum dry density and a lower optimum moisture

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