FEATURE
are used to measure the physical forces interacting between vibratory rollers and the asphalt. Many roller manufacturers offer accelerometers on newer roller models, and this data can sometimes be displayed to roller operators as a Compaction Measurement Value( CMV) number or similarly named quantity specific to the roller manufacturer. Traditionally, the challenge with CMV has been the difficulty of correlating it in the field with the density data obtained from core samples. Machine learning algorithms address this by analyzing large datasets from roller sensors and core samples to identify patterns, enabling more accurate real-time predictions of asphalt density. After proper calibration and training, these algorithms can perform in-field correlations, offering a percentage density number directly to roller operators during construction, thereby improving decision-making on the spot. There are many solutions available today that can be used as a contractor’ s quality control tool based on different technologies and the physical properties of asphalt. Each option is supported by research, but choosing the best fit for your company depends on factors such as density readout, who will receive and use the information( such as project managers, site supervisors or roller operators) and your current paving procedures.
Garrett Winkelmaier, Ph. D, is the General Manager of G4 Technologies. He can be reached at garrett. winkelmaier @ G4tech. com
REFERENCES Kennedy, T. W., McGennis, R. B., & Roberts, F. L.( 1984). Effects of compaction temperature and effort on the engineering properties of asphalt concrete mixtures. West Conshohocken, Pa.: ASTM International.
Pell, P. S., & Taylor, I. F.( 1969, February). Asphaltic road materials in fatigue. In Association of Asphalt Paving Technologists Proc.
Epps, J. A., Monismith, C. L., Warden, W. B., Pell, P. S., Kallas, B. F., Terrell, R. L.,... & Mcleod, N. W.( 1969, February). Influence of mixture variables on the flexural fatigue properties of asphalt concrete. In Association of Asphalt Paving Technologists Proc.
Linden, R. N., Mahoney, J. P., & Jackson, N. C.( 1989). Effect of compaction on asphalt concrete performance. Transportation research record,( 1217).
McLeod, N. W.( 1967). Influence of viscosity of asphalt-cements on compaction of paving mixtures in the field and discussion. Highway Research Record,( 158).
Kandhal, P. S., & Koehler, W. C.( 1984). Pennsylvania’ s experience in the compaction of asphalt pavements. West Conshohocken, Pa.: ASTM International.
Scherocman, J. A.( 1984). Guidelines for compacting asphalt concrete pavement. Better Roads, 54( 3).
Cooley, L. A., Prowell, B. D., & Brown, E.( 2002). Issues pertaining to the permeability characteristics of coarsegraded superpave mixes.
Booth C31119
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