Properties investigation of the SBS modified asphalt with a compound warm mix asphalt (WMA) fashion using the chemical additive and foaming procedure. (15th October 2021)

• Record Type: Journal Article
• Authors: Zhang, Shaowei; Wang, Duanyi; Guo, Feng; Deng, Yihao; Feng, Fuming; Wu, Qiyang; Chen, Zhaojie; Li, Yanbiao
• Is Part Of: Journal of cleaner production. Volume 319(2021)
• Publication Date: 2021-10-15
• Subjects: Surfactant additive -- SBS modified Bitumen -- Foaming behaviors -- Chemical analysis -- Rheological evaluations; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2021.128789
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Styrene-butane-styrene (SBS) modified bitumen has been widely applied in pavement engineering due to its excellent cracking and rutting resistance. However, there are workability concerns due to its higher viscosity compared to virgin bitumen. Conventional Warm Mix Asphalt (WMA) technologies including surfactants and foaming additives have been successfully applied to SBS bitumen. This study attempts to evaluate whether compound WMA technologies (e.g., the foaming procedure and the surfactant additive) can bring further engineering and environmental benefits. Surfactant additive solution (Evotherm-DAT) was used as a novel foaming agent to foam SBS bitumen instead of water during the foaming process. A series of chemical, foaming and rheological tests were conducted for performance evaluations on the surfactant additive (SA) foamed SBS bitumen. It was found that a limited chemical reaction happens among SA and SBS bitumen. Besides, surfactant used as the novel foaming agent can bring positive effects on foaming behaviors. Furthermore, SA foamed SBS bitumen presents better workability, rutting and fatigue resistance. Finally, it is proven that the compound WMA fashion using surfactant additive and foaming procedure is feasible on SBS bitumen. Graphical abstract: Image 1 Highlights: The surfactant additive (SA) foamed SBS modified asphalt (SAFB) was prepared and evaluated. The synergistic effects on foaming behaviors are significant. SAFB shows better workability and rheological performance. SAFB has a good low-temperature performance.