Traditional warm-mix asphalt (WMA) faces challenges in reducing mixing temperatures to achieve lower energy consumption. To address this challenge and meet global environmental goals, this study designs various composite warm-mix additives using commonly used additives and their optimal dosages. The viscosity reduction mechanisms of asphalt and asphalt mixtures are examined using viscosity–temperature and air voids-temperature curves. Regression equations for viscosity and voids as a function of temperature are developed to determine the optimal mixing temperature of WMA. The study integrates thermodynamic equilibrium equations with field data to quantify the energy consumption in producing composite WMA mixtures. The results reveal that WMA significantly reduces mixing temperatures, making it suitable for low-energy asphalt mixtures. The use of various composite additives enhances the mechanical properties of asphalt pavements. Optimal mixing temperatures are set as 60–100 °C for WMA in warm-paving applications, and 20–60 °C for WMA in cold-paving applications. Viscosity ranges from 0.17 to 0.28 Pa s, with air voids varying from 6% to 7% for WMA in warm-paving applications and 8%–9% for WMA in cold-paving applications. Controlling the mixing temperature improves energy-saving efficiency, achieving reductions from 47.1 % to 97.6 %. The study recommends the use of WMA (Sasobit/Evotherm/DAT) for warm-paving applications and WMA (Sasobit/Diesel oil) for cold-paving applications. This study provides valuable insights for developing energy-efficient and high-performance asphalt pavements.

中文翻译：

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复合添加剂低能耗温拌沥青混合料的温度控制及节能效率评价


传统的温拌沥青 （WMA） 在降低混合温度以实现降低能耗方面面临挑战。为了应对这一挑战并实现全球环境目标，本研究使用常用添加剂及其最佳剂量设计了各种复合温拌添加剂。使用粘度-温度和空隙-温度曲线研究了沥青和沥青混合物的降粘机制。开发了粘度和空隙率随温度变化的回归方程，以确定 WMA 的最佳混合温度。该研究将热力学平衡方程与现场数据相结合，以量化生产复合 WMA 混合物的能耗。结果表明，WMA 显著降低了混合温度，使其适用于低能沥青混合料。使用各种复合添加剂可增强沥青路面的机械性能。在温铺应用中，WMA 的最佳搅拌温度设置为 60-100 °C，在冷摊铺应用中，WMA 的最佳搅拌温度设置为 20-60 °C。粘度范围为 0.17 至 0.28 Pa s，在暖铺应用中，WMA 的空隙率为 6% 至 7%，在冷摊铺应用中，WMA 的空隙率为 8%–9%。控制混合温度提高了节能效率，从 47.1 % 降低到 97.6 %。该研究建议将 WMA （Sasobit/Evotherm/DAT） 用于暖铺应用，将 WMA （Sasobit/柴油） 用于冷摊铺应用。本研究为开发节能和高性能的沥青路面提供了有价值的见解。