填料对再生沥青胶浆黏弹响应的影响  

Effects of Fillers on Viscoelastic Response of Recycled Asphalt Cement

作　　者：陈华鑫[1] 牛昌昌 况栋梁[1] 田俊壮 杨凯[1] CHEN Huaxin NIU Changchang KUANG Dongliang TIAN Junzhuang YANG Kai(School of Material Science and Engineering, Chang＇an University, Xi＇ an 710061 ,China)

机构地区：[1]长安大学材料科学与工程学院,陕西西安710061

出　　处：《郑州大学学报（工学版）》2017年第2期72-77,共6页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目(50978031)

摘　　要：笔者通过布氏黏度试验和重复蠕变试验,对再生沥青和3种再生沥青胶浆的黏弹特性进行了研究,分析不同填料对再生沥青胶浆黏度、△Eη(黏流活化能)、GV值(蠕变劲度的黏性部分)和累计应变γacc的影响.研究表明:沥青和沥青胶浆的黏度恢复水平具有很大差异,再生系数从大到小依次为:矿粉沥青胶浆>水泥沥青胶浆>消石灰沥青胶浆>沥青;再生沥青的黏流活化能比原样沥青低,而3种再生沥青胶浆的黏流活化能与相应原样沥青胶浆相比均有不同程度的增大;再生沥青和再生沥青胶浆的GV值以及γacc的恢复水平同样具有很大的差异性.综合上述指标来看,3种填料对老化沥青胶浆黏弹特性的恢复具有不同程度的积极影响,且影响程度为:矿粉>水泥>消石灰.In this paper, brookfield viscosity test and repeated creep test were adopted to investigate the visco- elastic properties of recycled asphalt and 3 recycled asphalt cements, the viscosity, △Eη （viscous flow activa- tion energy）, Gv（the viscous part of creep stiffness） and cumulative strain γacc of recycled asphalt cements with different fillers were analysised. The experimental results indicated that the recovery levels of viscosity of asphalt and asphalt mastics showed great difference. The regeneration factors in decreasing order were slag as- phalt cement 〉 cement asphalt mortar 〉 lime mortar asphalt 〉 asphalt ; the viscous flow activation energies of 3 kinds of recycled asphalt cements were increased to varying degrees as well as the corresponding asphalt ce- ments. But the viscous flow activation energy of recycled asphalts were lower than virgin asphalt, the recovery levels of Gv and γacc also showed great differences between the recycled asphalt and recycled asphalt cements. Based on the above indicators, 3 kinds of fillers showed different degrees of positive impact On the restoration of viscoelastic properties of aging asphalt mortar, and the order of influences was slag 〉 cement 〉 lime.

关 键 词：再生沥青胶浆 填料 黏弹特性 黏流活化能 GV值 γacc 

分 类 号：U414[交通运输工程—道路与铁道工程]