摘要
为改善机场跑道和公路路面沥青混合料在高温环境下的性能劣化问题(尤其是热稳定性不足和热蚀现象),该文研究了相变材料对沥青抗热蚀性能的影响。选用3种相变材料对SBS改性沥青进行复合改性,通过TG-DSC试验、储/放热性能试验、沥青的室内热蚀模拟、三大指标试验及DSR等试验,系统分析了改性沥青的性能。结果表明:相变材料可有效调节沥青温度,减缓热蚀过程中的性能衰减;其中,A相变材料在高温环境下表现出优异的热稳定性和调温性能,而C相变材料因热稳定性较差,不适合用于沥青改性。此外,相变材料的加入,改善了沥青的微观结构,增强了分子间作用力,从而提升了沥青的抗变形能力和综合性能。研究成果可为机场道面沥青的改性和热蚀防护提供理论依据,证实了相变材料在提升沥青道面性能和延长使用寿命方面的有效性,对推动交通运输领域可持续发展具有积极意义。
In order to address the degradation issues faced by asphalt mixtures in airport runways and highway pavement,particularly focusing on thermal stability and thermal corrosion under high-temperature conditions,this paper investigated the impact of phase change materials(PCMs)on the thermal corrosion resistance of asphalt.Three types of PCMs were utilized to jointly modify SBS-modified asphalt,and a series of tests were conducted to systematically analyze the performance of the modified asphalt,including thermogravimetric-differential scanning calorimetry(TG-DSC)analysis,heat storage and release performance evaluation,laboratory thermal corrosion simulation of asphalt,three-index testing,and dynamic shear rheometer(DSR)testing.The results indicate that PCMs can effectively regulate asphalt temperature and significantly mitigate the degradation of asphalt properties during thermal corrosion.Specifically,PCM A exhibits superior thermal stability and temperature regulation performance under high-temperature conditions,whereas PCM C is unsuitable for asphalt modification due to its inferior thermal stability.Additionally,the inclusion of PCMs improves the microstructure of asphalt,enhancing intermolecular interactions and deformation resistance and improving overall asphalt performance.This study provides a theoretical foundation for asphalt modification and thermal corrosion protection in airport pavement,demonstrating the efficacy of PCMs in enhancing asphalt pavement performance and extending service life,which holds significant implications for the sustainable development of the transportation sector.
作者
李平
王志坚
郑志鹏
易成蹊
周德翔
LI Ping;WANG Zhijian;ZHENG Zhipeng;YI Chengxi;ZHOU Dexiang(School of Transportation,Changsha University of Science&Technology,Changsha,Hunan 410114,China;International Institute of Engineering,Changsha University of Science&Technology,Changsha,Hunan 410114,China;Chengnan College,Changsha University of Science&Technology,Changsha,Hunan 410114,China)
出处
《中外公路》
2025年第6期67-76,共10页
Journal of China & Foreign Highway
基金
广西科技重大专项(编号:桂科AA23062054,桂科AA23062034,桂科AA18242032)。
关键词
相变材料
改性沥青
热蚀
高温性能
phase change material
modified asphalt
thermal corrosion
high-temperature performance
