基于新型分步拌合技术的沥青混合料性能研究

Research on Asphalt Mixture Performance Based on New Step Mixing Technology

摘要: 通过对新型分步拌合技术和常规拌合技术生产的沥青混合料性能试验研究，对比分析不同拌合工艺对混合料路用、力学性能的影响，并进一步验证分步拌和技术降低混合料沥青用量的可行性，结果表明：与常规拌合技术相比，分步拌合技术在降低0.2%的沥青用量后，仍能够保证混合料路用和力学性能；两种拌和技术的混合料性能表现各有优异，但差别较小，分步拌合技术生产的沥青混合料其高温性能、劲度模量更好；常规拌和技术生产的沥青混合料低温性能、疲劳寿命表现更佳；而两种拌和技术生产的沥青混合料水稳定性相当。

Abstract: Through the experimental research on the performance of the asphalt mixture produced by the new step mixing technology and the conventional mixing technology, compare and analyze the influence of different mixing processes on the road use and mechanical properties of the mixture, and further verify the feasibility of the step mixing technology to reduce the amount of asphalt mixture. The results show that: compared with conventional mixing, the step mixing technology can still ensure the road use and mechanical properties of the mixture after reducing the asphalt dosage by 0.2%. The performance of the mixture is excellent, but the difference is small. The asphalt mixture produced by the step-mixing technology has better high-temperature performance and stiffness modulus. The asphalt mixture produced by conventional mixing technology has better low temperature performance and fatigue life performance; while the water stability of asphalt mixture produced by the two mixing technologies is equivalent.