Effects of Warm Mix Asphalt (WMA) Additives on the Properties of WMA Mixtures

Abstract:

The objective of this research was to investigate the influence of Warm Mix Asphalt (WMA) additives on asphalt mixture properties through the laboratory testing programs such as air voids, tensile strength ratio (TSR), dynamic stability, and low temperature bending failure strain tests. The experimental design included the use of three WMA additives of Sasobit, Evotherm and Rediset, one base (unmodified) binder source, and one modified binder source. The WMA mixtures were compared to those of controls, i.e., mixtures without the additives. Results from this study showed that: (1) WMA mixtures with Rediset, Evotherm, and Sasobit had slightly higher air voids than Hot Mix Asphalt （HMA）; (2) All WMA mixtures with SBS modified asphalt have lower TSR values than the original ones. The TSR of the WMA mixtures with base (unmodified) asphalt is not significantly different from HMA; (3) The WMA mixtures with SBS modified asphalt have lower values of the dynamic stability and bending failure strain than HMA, while the WMA mixtures with base asphalt are contrary, except with Rediset additives.

• Periodical: Applied Mechanics and Materials (Volumes 275-277)
• Pages: 2097-2102
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.275-277.2097
• Online since: January 2013
• Authors: Hong Zhu, Zhao Xing Xie, Wen Zhong Fan, Li Li Wang, Shen Junan
• Keywords: Base Asphalt and SBS Modified Asphalt, Evotherm and Rediset, Properties of Warm Mix Asphalt Mixtures, Warm Mix Asphalt Additives of Sasobit

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