Compaction methods of cold recycled asphalt mixtures and their effects on pavement analysis
João Paulo Costa Meneses, Kamilla Vasconcelos, Liedi Légi Bariani Bernucci, Elie Y. Hajj
Abstract
There is still no consensus on the most appropriate compaction method for the assessment of cold recycled asphalt mixtures (CRAMs). A limited number of studies sought to identify the effects of different compaction methods on the CRAMs mechanical properties. Effects of CRAMs compaction method (Proctor, Marshall, Gyratory and Vibratory) were evaluated in terms of physical properties, mechanical tests (linear viscoelastic characterization) of compacted mixtures, and three-dimensional pavement analysis (3D-MOVE). Air void content analysis indicated that the Marshall compaction method presented the highest coefficient of variation and the Gyratory the lowest. Proctor and Gyratory specimens showed similar linear viscoelastic properties, and the Vibratory presented a distinct behaviour. 3D-MOVE simulations, for various temperatures and pavement configurations, showed that differences due to compaction methods were not considered significant for the analysed scenario of this study.