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Ten years of research have resulted in the development of nuclear soil meters capable of measuring the moisture content and density of soils within the average accuracies required for engineered construction. This paper describes the use of surface-type nuclear soil meters for compaction control testing during the construction of new pavement facilities at Clinton County Air Force Base, Ohio.
This study was made using engineering models of the P-21 surface moisture probe and the P-22 surface density probe, manufactured by the Nuclear-Chicago Corp. Both cohesive and granular soils were tested. On the basis of use of the nuclear method at the Air Force Base it was concluded that the reliability of the nuclear method was comparable to that of conventional testing procedures for compaction control, time requirements per test were greatly reduced, and radiation hazard to operating personnel was negligible.
Chief, Ohio Hiver Division Laboratories, Corps of Engineers, U. S. Army, Cincinnati, Ohio