Densification of Asphalt Pavements by Trafficby Charles R. Foster, Foster-Barrett & Associates, SugarLand, United States,
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Abstract: Since asphalt pavements rut when the voids are filled with asphalt (and voids can become filled by traffic densification) the voids that develop under traffic are vital to any mix design procedure. Data cited show that all asphalt pavements densify rapidly under the first few repetitions of either accelerated simulated airplane traffic or normal highway traffic after which very little densification occurs with continued traffic. The principal factor affecting the voids that developed under traffic was the constructed void content; it had far more effect on the developed voids than repetitions (beyond the first few) or tire contact pressures. Compaction specifications that control the constructed voids to an average of about 8 percent are needed to provide for traffic densification.
Subject Headings: Asphalt pavements | Voids | Traffic management | Traffic models | Pavement design | Pavement rutting | Air traffic | Highways and roads
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