纳米Al2O3改性沥青的制备及其性能研究
Study on Preparation and Properties of Nano-Al2O3 Modified Asphalt
王苗 1邢红梅 1张晓炜1
作者信息
- 1. 新疆农业职业技术学院,新疆昌吉 831100
- 折叠
摘要
为了研究纳米Al2O3改性剂对A-70#基质沥青物理性能、流变特性的影响及其微观改性机理.基于室内试验制备了不同掺量(1％、2％、3％、4％、5％)的纳米Al2O3改性沥青,对其进行三大指标、黏度、流变、抗老化性能及其傅里叶红外光谱试验测试.结果表明:加入纳米Al2O3之后,基质沥青的软化点和黏度提高,针人度及延度下降,纳米Al2O3最佳掺量为4％.由流变试验结果可知,纳米Al2O3可以提升基质沥青的车辙因子,显著增强其高温稳定性,抗老化性能得以提升,但对低温抗裂性能不利.根据微观分析结果,纳米Al2O3与基质沥青之间既产生了物理变化,又有微弱的化学反应存在.
Abstract
To study the effects of Nano-Al2O3 modifier on the physical properties,rheological properties of A-70# matrix asphalt and its microscopic modification mechanism,Nano-Al2O3 modified asphalt with different contents(1％,2％,3％,4％,5％)is prepared based on laboratory tests,and its three indexes,viscosity,rheology,anti-aging properties and Fourier infrared spectroscopy test are carried out.The results show that the softening point and viscosity of matrix asphalt after Nano-Al2O3 is added are improved,the penetration and ductility are decreased,and the optimal content of Nano-Al2O3 is 4％.The rheological test result shows that Nano-Al2O3 can improve the rutting factor of the matrix asphalt and significantly enhance its high temperature stability to improve the anti-aging properties,but it is not good for the anti-cracking performance at low temperature.According to the microscopic analysis results,there are both physical changes and weak chemical reactions between Nano-Al2O3 and the matrix asphalt.
关键词
纳米Al2O3/改性沥青/物理性能/流变特性/微观机理Key words
Nano-Al2O3/modified asphalt/physical properties/rheological properties/microscopic mechanism引用本文复制引用
基金项目
新疆维吾尔自治区自然科学基金(2020D01C003)
出版年
2024
NETL
NSTL
万方数据