F1赛道专用填料致级配变异及路面性能响应研究

Research on Gradation Variation and Pavement Performance Response of Special Fillers for F1 Tracks

摘要:

以F1上海国际赛车场翻修工程为依托，针对专用填料引发的沥青混合料级配波动问题，结合两台拌合楼生产计量曲线、试验室筛析及现场检测数据，分析集料计量波动、合成级配偏移规律及其对路面构造深度与压实度的影响。结果表明，设计掺量1.7%的填料发生0.2%~0.3%波动是集料计量波动核心诱因，粗集料仓对其敏感性显著高于细集料仓；合成级配在0.075~2.36 mm细集料区间偏移0.6%~0.8%，粗集料区间则基本稳定；路面构造深度与细集料通过率呈显著负相关，双机交界段构造深度变异系数达10%，压实度偏差为3.4%~5.2%。研究明确拌合楼计量波动是路面性能不均匀的内在根源，可为高等级赛道混合料级配控制与专用填料应用提供技术参考。

Abstract:

Based on the renovation project of the F1 Shanghai International Circuit, aiming at the gradation fluctuation of asphalt mixtures caused by special fillers, and combined with the production metering curves of two mixing plants, the laboratory sieve analysis and the on-site test data, the aggregate metering fluctuation, the synthetic gradation shift law and their impacts on pavement texture depth and compaction degree are analyzed. The results show that the 0.2%~0.3% fluctuation of the filler with a designed content of 1.7% is the core cause of aggregate metering fluctuation, and the coarse aggregate bins are significantly more sensitive to it than fine ones. The synthetic gradation shifts by 0.6%~0.8% in the 0.075~2.36 mm fine aggregate range while remaining basically stable in the coarse aggregate range. Pavement texture depth is significantly negatively correlated with fine aggregate passing rate. The coefficient of variation of texture depth in the dual-machine junction section reaches 10%, and the compaction degree deviation is 3.4%~5.2%. The study result confirms that metering fluctuation of mixing plants is the inherent cause of uneven pavement performance, providing technical reference for gradation control of mixtures and application of special fillers in high-grade race tracks.