仿生物基温拌再生沥青混合料路用性能影响因素

Influencing Factors of Road Performance of Bio-inspired Warm Mix Recycled Asphalt Mixture

摘要:

通过正交试验设计，优化了仿生物基温拌再生沥青混合料的空隙率、高低温性能及水稳定性，得到最佳组合参数.同时，采用傅里叶红外光谱（FTIR）技术，分析了仿生物基温拌再生剂对老化苯乙烯-丁二烯-苯乙烯嵌段共聚物（SBS）改性沥青的作用机理.结果表明：在试件击实成型温度为130 ℃、沥青混合料回收料（RAP）掺量为50%且仿生物基温拌再生剂掺量为4.5%条件下，温拌再生沥青混合料的性能达到最优；掺入4.5%仿生物基温拌再生剂能够有效恢复老化SBS改性沥青的官能团结构，这进一步验证了仿生物基温拌再生沥青混合料宏观性能优化的准确性.

Abstract:

Through orthogonal experimental design， the air void， high and low temperature performance， and water stability of bio-inspired warm mix recycled asphalt mixture were optimized， yielding the optimal combination of parameters. Concurrently， Fourier transform infrared spectroscopy （FTIR） technology was utilized to conduct analysis of the mechanism by which the bio-inspired warm mix rejuvenator affects the aged styrene-butadiene-styrene （SBS） modified asphalt. The results indicate that the performance of the warm mix recycled asphalt mixture is optimized under conditions of a specimen compaction temperature of 130 ℃， a reclaimed asphalt pavement （RAP） content of 50%， and a bio-inspired warm mix rejuvenator content of 4.5%. The incorporation of 4.5% bio-inspired warm mix rejuvenator can effectively restore the functional group structure of aged SBS modified asphalt， further validating the accuracy of the macroscopic performance optimization of the bio-inspired warm mix recycled asphalt mixture.