摘要
实现老化沥青的再生利用,寻求切实可行的老化沥青再生技术和手段,是目前亟需解决的工程问题。为此,研究通过向老化沥青中添加生物质重油的方法以实现老化沥青再生,同时采用布氏粘度、DSR、BBR对再生沥青的流变性能进行测试,同时结合原子力显微镜(AFM)、凝胶渗透色谱(GPC)等微观表征手段对其再生机理进行研究。结果表明:生物质重油可显著改善老化沥青的流变性能;生物质重油再生沥青具有明显良好的低温抗开裂能力;此外,通过观测微观表面形貌发现,生物质重油掺入后,随着其掺量的增大,沥青中胶团逐渐解聚,解聚得到的小蜂状结构逐渐被沥青中的轻组分溶解,蜂状结构逐渐变小,且数目增多;生物质重油对老化沥青的再生以物理作用为主,存在微弱的化学反应。
It is an urgent engineering problem to realize the recycling of aged asphalt and to seek feasible asphalt recycling technologies. The regeneration was realized by adding biomass heavy oil into the aged asphalt. The rheological properties of the recycled asphalt were tested by viscosity, DSR and BBR. The regeneration mechanism was studied by Atomic force microscopy (AFM) and Gel permeation chromatography (GPC). The results show that the rheological properties of aged asphalt can be significantly improved by biomass heavy oil, and the properties of aging asphalt can be restored to the original level (matrix asphalt). Similarly, by observing the micro-surface morphology, it is found that with the increase of biomass heavy oil content, the micelles in asphalt are gradually depolymerized and depolymerized. The Bee-like structure is gradually dissolved by light components in asphalt, its size is reduced and the number of bee-like structure is increasing. The regeneration of biomass heavy oil on aging asphalt is mainly physical effect, existing a weak chemical reaction.
作者
方金苗
韩治勇
涂劲松
吴坤铭
FANG Jin-miao;HAN Zhi-yong;TU Jing-song;WU Kun-ming(School of Architecture and Civil Engineering,West Anhui University,Liu'an 237012,China)
出处
《硅酸盐通报》
CAS
北大核心
2019年第4期1024-1029,1037,共7页
Bulletin of the Chinese Ceramic Society
基金
安徽省高校自然科学一般项目(KJ103762015B14)
安徽省高校自然科学重点项目(KJ2014A278)
省级精品开放课程项目(2017kfk077)
关键词
道路工程
生物质重油
再生沥青
流变性能
再生机理
road engineering
biomass heavy oil
recycled asphalt
rheological property
regeneration mechanism
