基于路用性能的多源废旧胶粉品类判定

Determination of Classification Criteria for Multi-Source Crumb Rubber Powder Based on Road Performance Evaluation

摘要:

为判定多源废旧胶粉对沥青改性的适用性，选取子午胎、尼龙胎、轿车胎、口皮、胶管和输送带等胶粉，对其成分组成、官能团分布、微观形貌和元素组成进行分析，对纯胶粉、胶粉?SBS复合改性沥青及其混合料性能进行深入研究。结果表明，轿车胎和尼龙胎胶粉与子午胎胶粉在微观结构与宏观性能方面均相近，是优良的沥青改性胶粉，而口皮、胶管和输送带胶粉不宜直接用于沥青改性，需进行复合改性。基于此，结合现有胶粉品类分级标准，提出基于路用性能的胶粉品类判定技术标准。

Abstract:

To evaluate the suitability of multi-source crumb rubber powder for asphalt modification rubber powders derived from radial tires， nylon tires， passenger car tires， tire bead， rubber hoses， and conveyor belts were selected to analyze its composition， functional group distribution， microscopic morphology， and elemental composition. Furthermore， the properties of single rubber powder， rubber powder-SBS composite modified asphalt， and their mixtures were studied. The results indicated that rubber powders from passenger car tires and nylon tires exhibit similar microstructures and macroscopic properties to those from radial tires， making them high-quality modifiers for asphalt. However， rubber powders from tire bead， rubber hoses， and conveyor belts are not suitable for direct use in asphalt modification and require composite modification. Based on these findings， and in conjunction with the existing classification standards for rubber powders， a technical standard for the classification of rubber powders based on road performance was proposed.