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Analysis of the Vacuum, Rotarex and Reflux Extraction procedures show the superiority of the Vacuum method over the other two. The advantages are: improved accuracy, reduced testing time and lower cost. The Vacuum Extractor is especially useful in bituminous paving construction control.
Vacuum, Vacuum Extractor, Bitumen Extraction, Bituminous Mixtures, Project Control
Jones, G. M.
Engineer of Tests and Research, Utah State Department of Highways,
Wiley, M. L.
Materials Engineer, Utah State Department of Highways,
Smith, R. F.
Statistician, Utah State Department of Highways,