Laboratory investigation of gyratory-vibratory compaction method for better simulating asphalt mixture field compaction

To better simulate the effect of vibration and kneading for steel-wheel roller, a novel lab compaction method combining the effect of vibratory and gyratory compaction was proposed. X-ray tomography was used to compare the air void distribution of the in-situ core samples and the laboratory-compacted samples by different compaction methods, including vibratory, gyratory and the combinatory method. It was found that different compaction methods significantly affected the air void distribution of specimens. The combination of vibratory and gyratory compaction methods presented comparable air void distribution and compaction effect to the in situ core samples.

Automated summary

In this study, a novel lab compaction method combining the effects of vibratory and gyratory compaction was proposed to better simulate the vibration and kneading effect of a steel-wheel roller. X-ray tomography was used to compare the air void distribution of in-situ core samples and laboratory-compacted samples by different compaction methods. The results showed that the combination of vibratory and gyratory compaction methods had a comparable air void distribution and compaction effect to the in-situ core samples.