摘要
Graphene-modified asphalt(GMA)for road application was prepared via using metal-free phthalocyanine-dispersed to modify an SK-70#base asphalt with graphene.The preparation parameters are as follows:the content of graphene is 0.26%based on the mass percentage of absolute ethanol,the content of nonmetal phthalocyanine is 190%based on the mass percentage of graphene,and then the GMA is prepared via unique high-speed shearing with continuing to ventilate nitrogen,which can prevent the aging of modified asphalt in the high-speed shearing process,and effectively evaluate the modifier.The penetration,softening point,force ductility,and fracture energy of GMA were significantly improved based on the base asphalt.Thus,the incorporation of graphene could enhance the base asphalt’s high-and low-temperature stability.The modification mechanism was researched via metallographic microscopy,computed tomography(CT),Fourier transform infrared spectroscopy(FTIR),and atomic force microscopy(AFM).Adsorption and physical dispersion of the asphaltenes and resins in the phthalocyanine-graphene system were confirmed.
作者
黄刚
HUANG Hao
ZHANG Xia
HE Junxi
ZHOU Chao
TAN Yan
FENG Manman
LüChuncheng
HUANG Gang;HUANG Hao;ZHANG Xia;HE Junxi;ZHOU Chao;TAN Yan;FENG Manman;LÜChuncheng(National and Local Joint Engineering Laboratory of Traffic Civil Engineering Materials,Chongqing Jiaotong University,Chongqing 400074,China;Xinjiang Transportation Planning,Survey,Design and Research Institute Co.,Ltd,Wulumuqi 830006,China;China Merchants Chongqing Testing Center for Highway Engineering Co.,Ltd,Chongqing 400074,China)
基金
Funded by National Natural Science Foundation of China(No.51778096)
Natural Scienceof CQ CSTC(No.cstc2016jcyjA0119)