摘要
为了研究生物沥青的制备工艺和基本性能,利用正交设计法研究不同因素(制备温度、拌和时间、重油掺量)对生物沥青性质的影响,并对生物重油掺量质量分数为20%、30%、40%和50%的生物沥青的针入度等级性能进行评价。研究表明:随着重油掺量的增加,生物沥青的针入度、软化点、延度值变化趋势分别为增大、降低、增大,而短期老化后,呈相反趋势;表观黏度随重油掺量的增加而减小;在高温条件下,生物沥青出现"剪切稀化"现象。
In order to study the preparation process and basic performance of bio-asphalt,orthogonal design method was used to study the effect of different factors including preparation temperature,mixing time and biological heavy oil content on the proper-ties of bio-asphalt.The performance of penetration grade bitumen with different contents（20%,30%,40% and 50%）of biologi-cal heavy oil were evaluated.The results show that the penetration of bio-asphalt is increased,the softening point of bio-asphalt is decreased and the ductility of bio-asphalt is increased with the increase of bio oil content.However,the tendencies are opposite after short-term aging.Apparent viscosity decreases with the increase of bio oil content.At high temperature,bio-asphalt binder appears the phenomenon of shear thinning.
出处
《中国科技论文》
CAS
北大核心
2015年第12期1474-1478,共5页
China Sciencepaper
基金
国家自然科学基金资助项目(51378074)
交通运输部应用基础研究资助项目(2014319812180)
关键词
道路工程
生物沥青
正交设计法
针入度分级
剪切稀化
highway engineering
bio-asphalt binder
orthogonal design method
penetration grade
shear thinning
作者简介
汪海年（1977-），男，副教授，主要研究方向为路面结构与材料性能及道路工程数值仿真，wanghainian@aliyun．com
