Use of Pyrolyzed Carbon Black as Additive in Hot Mix Asphalt
Publication: Journal of Transportation Engineering
Volume 123, Issue 6
Abstract
This paper deals with the performance of mixtures of asphalt, pyrolyzed carbon black (CBp), and two aggregates (limestone and slag). Marshall mix design was performed to determine the optimum binder content at 6% of air voids. The range of the optimum binder content was 4.2%–5.5% for limestone mixtures and 6.3%–7.8% for slag mixtures, respectively. Dynamic confined creep tests, gyratory tests, resilient modulus tests, indirect tensile tests, and Hamburg wheel tracking tests were carried out using mixtures at the optimum binder content. The test results indicate that the use of CBp in asphalt pavements increases Marshall stability, decreases permanent strain, decreases the mix strain rate at 50°C and 138 kPa confinement, increases resilient modulus and tensile strength, and increases the stripping inflection point. These results suggest that CBp improves asphalt pavement performance.
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 123 • Issue 6 • November 1997
Pages: 489 - 494
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Nov 1, 1997
Published in print: Nov 1997
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