紫外光老化对沥青砂黏弹性能的影响  

Influence of Ultraviolet Aging on Viscoelastic Properties of Asphalt Sand

作　　者：李惠霞[1] 管巧艳[2] 童申家[3] 

机构地区：[1]河南城建学院交通运输工程学院,河南平顶山467000 [2]郑州航空工业管理学院土木建筑工程学院,河南郑州450000 [3]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《建筑材料学报》2015年第3期513-517,共5页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51108375)

摘　　要：对AS-16沥青砂进行了0,97,194,292,388,583h的室内模拟紫外光照射,并针对老化后的沥青砂试件进行单轴压缩蠕变试验,得到应变-时间关系曲线,从而拟合得到材料的黏弹性参数.用3种柔量值占总柔量值的比例分析沥青砂的黏弹性力学性质.结果表明:随着紫外光老化时间的增加,沥青砂的黏性比例越来越小,逐渐表现为弹性;抗瞬时变形的能力及抵抗永久变形的能力增强,低温抗裂性能及抗疲劳性能降低.AS-16 asphalt sands were radiated by simulated UV irradiation for 0,97,194,292,388,583 h.The aged specimens were used to do uniaxial compressive creep test to get the curves of strain-time and then get the fitted viscoelastic parameters.The proportion of a ratio of one compliance to total compliance were used to analyzed the viscoelastic properties of asphalt sands.The results show that with the increasing of UV aging time,the viscosity of the asphalt sand is lower and the elastic property is strong.The capabilities of instantaneous deformation and permanent deformation resistance are increased,low temperature crack resistance and fatigue resistance decreases.

关 键 词：沥青砂 紫外光老化 单轴压缩蠕变试验 黏弹性参数 黏弹性能 

分 类 号：TU528.01[建筑科学—建筑技术科学]