Wheel tracking methods to evaluate moisture sensitivity of hot-mix asphalt mixtures

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• 作者：Jie Han ; Harihar Shiwakoti
• 关键词：hot ; mix asphalt ; moisture sensitivity ; rutting ; wheel tracking test
• 刊名：Frontiers of Architecture and Civil Engineering in China
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：10
• 期：1
• 页码：30-43
• 全文大小：1,309 KB
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• 作者单位：Jie Han (1)
  Harihar Shiwakoti (2)
  
  1. Department of Civil, Environmental, and Architectural Engineering, the University of Kansas, Lawrence, KS, 66044, USA
  2. Virginia Department of Transportation, 1401 E. Broad St., Richmond, VA, 23219, USA
  
• 刊物类别：Engineering
• 刊物主题：Civil Engineering
  Cities, Countries and Regions
  Chinese Library of Science
  
• 出版者：Higher Education Press, co-published with Springer-Verlag GmbH
• ISSN：1673-7512

文摘

Existing test methods to determine moisture sensitivity in hot-mix asphalt (HMA) mixtures are time consuming and inconsistent. This research focused on wheel tracking devices to evaluate moisture sensitivity. The Asphalt Pavement Analyzer (APA) and the Hamburg Wheel Tracking Device (HWTD) were used for this research. Compacted cylindrical samples were fabricated using a Superpave Gyratory compactor. This study selected two most commonly used mixtures, SM-12.5A with PG 64-22 binder in overlay projects and SM-19A mixtures with PG 64-22 binder for major modification projects at Kansas Department of Transportation. Test results show that APA tests could induce stripping in most samples without any anti-stripping agent, which could be identified visually. However, APA results did not indicate any stripping inflection point while the HWTD results showed stripping inflection points, which are important to identify stripping potential of mixtures. The APA results show that wet tests are severe at lower temperatures. The HWTD results show improvement in the performance using anti-stripping agents at later stage. The HWTD test is more effective as a rapid test method in case of determining moisture sensitivity. Laboratory results from this study should be verified and correlated with field performance. Keywords hot-mix asphalt moisture sensitivity rutting wheel tracking test