合成材料老化与应用2024，Vol.53Issue(5)：17-21,5.
Sasobit/SBR复合改性沥青流变性能研究
Study on the Rheological Properties of Sasobit/SBR Composite Modified Asphalt
张峥玮 1王立军 1李字霞 2赵强 1冀立新 1张雨1
作者信息
- 1. 东北林业大学土木与交通学院,黑龙江哈尔滨 150040
- 2. 国网哈尔滨供电公司,黑龙江哈尔滨 150000
- 折叠
摘要
Abstract
To develop a composite modified asphalt that balances high and low-temperature performance while being environmentally friendly,this study selected Sasobit and SBR as modifiers to prepare a composite modified asphalt with good high and low-temperature properties.The rheological properties of the composite modified asphalt before and after aging with different mixing ratios(Sasobit content of 0%,1%,2%,3%,4%;SBR content of 0%,3%,4%,5%,6%)were studied to determine the optimal mixing ratio of Sasobit/SBR composite modified asphalt.The modification mechanism of composite modified asphalt was investigated using infrared spectroscopy,and the dispersion of modifiers in asphalt was observed using fluorescence microscopy.The results show that the addition of Sasobit improves the high-temperature rheological performance of asphalt and reduces its low-temperature rheological performance;the addition of SBR improves the low-temperature rheological performance of asphalt but has no significant effect on high-temperature rheological performance.Considering cost-effectiveness,the optimal mixing ratio for the composite modified asphalt is 3%Sasobit+5%SBR.The study of the modification mechanism using infrared spectroscopy indicates that the modification mechanism of composite modified asphalt is physical modification,with both modifiers evenly distributed in the asphalt and cross-linking structures formed.关键词
Sasobit/SBR/流变性能/短期老化/微观研究Key words
Sasobit/SBR/rheological properties/short-term aging/microscopic study分类
交通工程引用本文复制引用
张峥玮,王立军,李字霞,赵强,冀立新,张雨..Sasobit/SBR复合改性沥青流变性能研究[J].合成材料老化与应用,2024,53(5):17-21,5.
