Melaku Robeam S, Liu Jun, Gedafa Daba S
Addis Ababa Institute of Technology, Department of Civil Engineering, Addis Ababa 365, Ethiopia.
Department of Civil Engineering, University of North Dakota, Grand Forks, ND 58202, USA.
Materials (Basel). 2024 Aug 29;17(17):4276. doi: 10.3390/ma17174276.
Waste Cooking Oil (WCO), Soy Oil (SO), and Wastewater Sludge (WWS) have great potential to increase reclaimed asphalt pavement (RAP) content for economic and environmental benefits. This study explored the effects of SO and WCO on rutting, fatigue cracking, and low-temperature cracking performance of binders and Hot Mix Asphalt (HMA) with high RAP content. The potential effect of WWS on the performance and compaction efforts of high RAP content mixes at a 10 °C (50 °F) lower compaction temperature than the control compaction temperature was also investigated. The results indicated that 85% of the RAP binders can be incorporated while maintaining similar performance compared to the control by using 15% SO or 12.5% WCO as a rejuvenator with 2.5% virgin binder. Adding 1% WWS by weight of the total binder improved the binder's rheological properties, the mix's cracking performance, and the mix's density at lower compaction temperatures.
废食用油（WCO）、豆油（SO）和废水污泥（WWS）在提高再生沥青路面（RAP）含量以实现经济和环境效益方面具有巨大潜力。本研究探讨了SO和WCO对高RAP含量的粘结剂和热拌沥青（HMA）的车辙、疲劳开裂和低温开裂性能的影响。还研究了在比对照压实温度低10°C（50°F）的压实温度下，WWS对高RAP含量混合料性能和压实效果的潜在影响。结果表明，通过使用15%的SO或12.5%的WCO作为再生剂和2.5%的原生粘结剂，可掺入85%的RAP粘结剂，同时保持与对照相似的性能。按总粘结剂重量添加1%的WWS可改善粘结剂的流变性能、混合料的开裂性能以及在较低压实温度下混合料的密度。
