摘要
为研究石墨烯对橡胶沥青及混合料性能的影响,选取橡胶沥青和SBS改性沥青作为对照组,首先采用离析、动态剪切流变和弯曲梁流变等试验,针对石墨烯/橡胶复合改性沥青的储存稳定性和高低温流变性能进行研究,然后基于一系列室内试验系统评价了石墨烯对橡胶沥青混合料路用性能的影响规律。结果表明,掺入石墨烯可提高橡胶沥青的储存稳定性和高温抗车辙及抗永久变形性能,但也降低了橡胶沥青的低温应力松弛能力;石墨烯能够显著增强橡胶沥青混合料的高温稳定性和抗水损害性,但同时也削弱了混合料在低温条件下的抗裂性能;石墨烯用量过多易形成聚团致使沥青性能下降,建议石墨烯用量控制在0.06%左右。
To investigate the influence of graphene on the performance of rubber asphalt and its mixtures,rubber asphalt and SBSmodified asphalt were chosen as the control references.Initially,the storage stability and rheological properties at high and low temperatures of graphene-rubber composite modified asphalt were examined through segregation test,dynamic shear rheometry,and bending beam rheology tests.Subsequently,the pavement performance of the rubber asphalt mixture influenced by graphene was assessed utilizing various indoor testing systems.The findings indicate that the incorporation of graphene enhances the storage stability,high-temperature rutting resistance,and resistance to permanent deformation of rubber asphalt,while simultaneously decreasing the low-temperature stress relaxation capacity of the asphalt.Graphene significantly improves the high-temperature stability and resistance to water damage of the rubber asphalt mixture,yet it diminishes the mixture’s crack resistance under lowtemperature conditions.An excessive amount of graphene tends to form aggregates,which adversely affects the performance of the asphalt.It is recommended that the content of graphene be adjusted to approximately 0.06%.
作者
彭亚涛
PENG Ya-tao(Henan Zhongping Jiaoke Research and Design Institute Co.,Ltd.,Pingdingshan 467000,Henan,China)
出处
《合成材料老化与应用》
CAS
2024年第5期50-52,63,共4页
Synthetic Materials Aging and Application
关键词
道路工程
石墨烯
橡胶沥青
路用性能
road engineering
graphene
rubber asphalt
road performance
