INVESTIGATION OF RUTTING PERFORMANCE OF DIFFERENT WARM MIX ASPHALT (WMA) MIXTURES

Authors

  • Ivan Syed
  • Md Amanul Hasan
  • Rafiqul A. Tarefder

Keywords:

Warm mix additives, Rutting resistance, PG temperature sweep, MSCR

Abstract

Use of warm mix asphalt (WMA) in pavement industries has been growing rapidly over last
decade because it can lower down the construction temperature and subsequently reduces the environment
pollution and energy consumption. There are mainly two different types of WMA technology are available:
water-based foaming, and chemical additives. One of the challenges to WMA technology, the uncertainty about
performance of WMA mixtures is still unclear. To this end, this study investigated the rutting performance
(one of the major distresses) of mixtures with different WMA additives. Rutting performance of WMA
mixtures with four different additives (Terex® foaming, Evotherm®, Cecabase®, and Cecabase®+) were
evaluated and compared with the control (un-modified) hot mix asphalt (HMA) mixture through Hamburg
wheel track test (HWTT). Results showed that all WMA mixtures have lower rut depth compared to control
HMA mixture. It is also observed that Terex® and Cecabase® samples exhibited better rutting resistance than
Evotherm® sample. However, Cecabase®+ WMA sample showed significant enhancement in rutting resistance
due to presence of polymer. In addition to mixture test, extracted binders from these mixtures were also
evaluated though Superpave performance grade (PG) and multiple stress creep recovery tests. The performance
orders of the extracted binders from these two tests are also similar as the mixture performance. This study also
found that non-recoverable compliance (Jnr) value obtained from the MSCR test demonstrated better
correlation with HWTT (R2 = 0.96) compared to Superpave rutting parameter (R2 = 0.68).

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Published

2018-05-28

How to Cite

Ivan Syed, Md Amanul Hasan, & Rafiqul A. Tarefder. (2018). INVESTIGATION OF RUTTING PERFORMANCE OF DIFFERENT WARM MIX ASPHALT (WMA) MIXTURES. GEOMATE Journal, 14(45), 116–123. Retrieved from https://geomatejournal.com/geomate/article/view/2583

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