In this paper, the correspondence was investigated between indoor compaction test and vibratory roller compaction as follows.
(1) From compaction results with various vibratory rollers, it was made clear that soil densities were determined by their dynamic line pressure.
(2) From impact compaction tests with various impact energies, it was ascertained that soil densities were determined by energy of rammer defined by the product of rammer weight and dropping height.
(3) The relationship between rammer energy and dynamic line pressure was investigated through the medium of densities obtained from (1), (2).
On the relationship obtained from (3), we suggested a new method for predicting the density of the field compacted soil from impact compaction test whose energy was changed according to respective vibratory rollers and its applicability was confirmed in field compaction.
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