Portal de Periódicos da CAPES

STUDY OF JOINT DENSITIES IN BITUMINOUS AIRPORT PAVEMENTS

1987; SAGE Publishing; Issue: 1126 Linguagem: Inglês

2169-4052

James L. Burati, George B Elzoghbi,

Non-Destructive Testing Techniques

In this paper, a research project (a) to collect data on field projects to determine joint density values currently obtained in the field, (b) to determine whether correlation exists between mat density and joint density results, and (c) to determine the differences between the use of in-place density and the use of percent compaction for density acceptance decisions is summarized. Data were collected on two runway paving projects selected by the FAA Eastern Region using cores and three nuclear density gauges (CPN M-2, Seaman C-75BP, and Troxler 3411-B). These data were analyzed statistically to identify current production capabilities with respect to joint densities and possible correlations between mat and joint density results. The findings indicate that joint density values are statistically significantly lower and more variable than density values obtained in the paving mat. This was true for both the core and nuclear gauge results on both projects studied. If joint density is to be considered an acceptance characteristic, it will therefore be necessary to use different acceptance limits for joint density than are currently used for mat density. There was a positive correlation between average lot mat and joint density results for both projects studied; however, the magnitude of the correlation differed between the projects. Several disadvantages of the use of the percent compaction approach are identified and discussed.