摘要
为了进一步提升聚苯乙烯-丁二烯-苯乙烯(SBS)改性沥青的中温疲劳和低温抗开裂性能,将适量低黏度的大豆油(Bio-oil)和废机油(WEO)加入到SBS和基质沥青中制备成低黏油/SBS复合改性沥青。用旋转薄膜老化烘箱(FTRO)和压力老化容器(PAV)试验来模拟各改性沥青样品短期和长期老化。通过采用多应力蠕变松弛(MSCR)、线性振幅扫描(LAS)和弯曲梁流变仪(BBR)试验分别从高-中-低温性能的角度来表征复合改性沥青的流变性能。试验结果表明,两类低黏油均能有效地提升SBS改性沥青的中温疲劳性能和低温开裂性能,而MSCR结果显示高温性能受到了一定负面影响。总的来说,与WEO相比,Bio-oil的改性效率较高,即同等的性能提升前提下,所需Bio-oil掺量较低。
To further improve the medium-temperature fatigue performance and low-temperature crack resistance of the styrene-butadiene-styrene(SBS)modified asphalt,low-viscosity oil/SBS composite modified asphalt was prepared by adding moderate bio-oil and waste engine oil(WEO)with low viscosity into SBS and matrix asphalt.The short-term and long-term aging of modified asphalt samples were simulated through the rolling thin-film oven(RTFO)and pressurized aging vessel(PAV)tests.The multiple stress creep relaxation(MSCR),linear amplitude sweep(LAS),and bending beam rheometer(BBR)were used to demonstrate the rheological properties of modified asphalt samples in terms of high-temperature,medium-temperature,and low-temperature performance,respectively.The test results showed that both two types of low-viscosity oil can effectively improve the medium-temperature fatigue resistance and low-temperature crack resistance of SBS-modified asphalt,however,the MSCR results showed that the high-temperature performance was negatively affected to a certain extent.In summary,compared with WEO,the bio-oil has higher modification efficiency,that is,to improve the same performance,the required bio-oil content is lower.
作者
王慧峰
WANG Hui-feng(Shanxi Transportation Survey&Design Institute Co.,Ltd.,Taiyuan,Shanxi 030032,China)
出处
《山西交通科技》
2023年第2期8-11,共4页
Shanxi Science & Technology of Transportation
关键词
道路材料
改性沥青
SBS
低黏度油
流变性质
road material
modified asphalt
SBS
low viscosity oil
rheological properties
作者简介
王慧峰(1991—),男,山西大同人,工程师,工学硕士,2017年毕业于长安大学道路与铁道工程专业。
