Laboratory evaluation of warm mix asphalt using Sasobit®

• Autores: S.W. Goh, Yu Liu, Z. You
• Localización: Bearing capacity of roads, railways and airfields: proceedings of the 8th International Conference on the Bearing Capacity of Roads, Railways and Airfields, Champaign, Illinois, USA, June 29-July 2, 2009 / Erol Tutulumluer (dir.), Imad L. Al-Qadi (dir.), Vol. 1, 2009, ISBN 9780415804325, págs. 315-320
• Idioma: inglés
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• Resumen

  • In comparison with other civil or general engineering construction, hot mix asphalt (HMA) design and construction can be said to consume significantly larger amounts of the United States energy resources. Thus, strategies to increase HMA sustainability are needed. The potential of using Warm Mix Asphalt (WMA) in reducing the energy consumption and emissions of HMA is part of the solution to resolve this issue. In this study, WMA binders made with Sasobit® at the rate of 2%, 3% and 4% based on total weight of asphalt were prepared and examined using the dynamic shear rheometer (DSR). Field produced samples were also collected and compared using the Superpave compactor. It was found that the additional Sasobit® increased the dynamic shear modulus (G*) of the asphalt binder significantly. The G* values increased when the rate of Sasobit® increased. Additionally, there was no significant difference in volumetric properties between WMA and HMA, even though the compaction temperature for WMA was about 25°C lower than the HMA compaction temperature.