Compaction Control of Bituminous Concrete Using Nuclear Density Gauges

摘要

The objective of the study was to develop a procedure for the use of the thinlayer nuclear density guage by collecting data from the laboratory and field. An analysis of the laboratory data showed that there was no significant difference in the averages of four readings taken at one, two, or four minute counts. Also, it was observed that the influence of the density of the underlying material on the top layer density determination is a function of top layer thickness. Field data was collected during the 1987 and 1988 construction seasons. In 1987, data was collected using the normal, special calibration, and surface void modes. Analysis of the 1987 data showed that the mean of the nuclear densities obtained using the special calibration mode were the same as the meancore densities. Therefore, in 1988 data was collected using the special calibration mode only.