EVA改性沥青重复蠕变变形特性分析  

Analysis of Repeated Creep Deformation Characteristics of EVA Modified Asphalt

作　　者：王爱峰 李自力 李锐铎[2] Wang Aifeng;Li Zili;Li Ruiduo(Henan Zhongzhou Road and Bridge Construction Co., LTD, Zhoukou 466000, China;Henan University of Urban Construction, Pingdingshan 467036, China)

机构地区：[1]河南中州路桥建设有限公司,河南周口466000 [2]河南城建学院,河南平顶山467036

出　　处：《黑龙江科学》2020年第24期12-15,共4页Heilongjiang Science

摘　　要：使用不同掺量的乙烯—乙酸乙烯酯共聚物(EVA含量分别为0%、3%、6%、9%)和70#A级道路石油沥青制备改性沥青,利用动态剪切流变仪对EVA改性沥青进行重复蠕变试验。结果表明,随着EVA掺量的增加,EVA改性沥青的高温稳定性逐渐增强,但抗变形能力的增加幅度不断降低。在重复蠕变恢复试验中,蠕变循环次数越多,则沥青变形的因素中黏性因素逐渐减小,弹性因素逐渐增加。随着EVA改性剂掺量的增大,沥青变形的因素中黏性因素逐渐减小,弹性因素逐渐增加。EVA modified asphalt was prepared through using different dosage of ethylene/vinyl acetate copolymer(EVA content of 0%,3%,6%and 9%,respectively)and A grade 70#road asphalt preparation of modified asphalt.Dynamic shear rheometer was used to conduct repeated creep test on EVA modified asphalt.The results show that EVA modified asphalt high temperature stability increased with the increase of dosage of EVA,but the ability to resist deformation increase amplitude decrease.In the repeated creep recovery,the more the creep cycle is,the less the viscous factor and the more the elastic factors are.With the increase of EVA modifier content,the viscosity factor of asphalt deformation gradually decreases,while the elasticity factor gradually increases.

关 键 词：EVA改性沥青 重复蠕变 高温稳定性 黏性 

分 类 号：U414[交通运输工程—道路与铁道工程]