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CORRELATION OF NUCLEAR DENSITY RESULTS WITH CORE DENSITIES

1987; SAGE Publishing; Issue: 1126 Linguagem: Inglês

2169-4052

James L. Burati, George B Elzoghbi,

Probabilistic and Robust Engineering Design

The paper summarizes the findings of a research effort (a) to determine whether correlation exists between the results of nuclear density gauges and core densities obtained in the field and (b) to determine whether the use of nuclear density gauges in lieu of cores is warranted. Data were collected on two runway paving projects selected by the FAA Eastern Region using cores and three nuclear gauges (CPN M-2, Seaman C-75BP, and Troxler 3411-B). The data were analyzed statistically to identify possible correlations among the nuclear gauges and between the nuclear gauge readings and the core results. The results indicted that the level of correlation among the core and gauge results varied from gauge to gauge and from project to project. There was a higher degree of correlation among the gauges than there was between the core densities and the gauge results. It is recommended that nuclear gauges not simply be substituted for core densities if the acceptance limits have been developed for cores because the gauge results do not necessarily correlate well with the core results. If nuclear gauges are to be used for acceptance purposes, then appropriate acceptance limits should be developed for use with the gauges.