基于旋转黏度的SBS改性沥青黏温特性及流体行为分析
Analysis of asphalt viscosity-temperature characteristics and fluid behavior for SBS modified asphalt based on rotational viscosity
丁湛 1陈佳茹 1周春雨 1栗慧峰 2贾瑶 3李德政 3冯仓4
作者信息
- 1. 长安大学水利与环境学院,陕西西安 710054;长安大学旱区地下水文与生态效应教育部重点实验室,陕西西安 710054;长安大学水利部旱区生态水文与水安全重点实验室,陕西西安 710054
- 2. 长安大学公路学院,陕西西安 710064
- 3. 长安大学水利与环境学院,陕西西安 710054
- 4. 陕西煤业化工技术研究院有限责任公司,陕西西安 710199
- 折叠
摘要
采用3种基质沥青制备相应的SBS改性沥青,测试了不同温度和剪切速率下的黏度.根据Andrada方程计算了 6种沥青的黏流活化能(Ea);根据幂律方程,分别计算了 6种沥青的非牛顿指数(ζ)和稠度系数(μ),分析了改性沥青的流体特性以及黏度对剪切速率的依赖性.结果表明,Andrada方程能够较好地描述沥青及改性沥青的黏温关系,Ea能够反映黏度对温度的敏感性,SBS改性可以显著提升沥青的黏度,但不同改性沥青的温度敏感性存在差异.SBS改性沥青的ζ值均小于1,沥青由牛顿流体向非牛顿流体转化,不同类型沥青之间非牛顿性的相对强弱随温度的变化呈现出复杂性,稠度系数(μ)随温度的升高而减小.
Abstract
Three kinds of base asphalt were used to prepare there SBS modified asphalts.The viscosity val-ues of the six kinds of asphalt were obtained for different temperatures and shear rate.The six kinds of base asphalt viscous activation energy(Ea)was calculated using the Andrada equation.According to the power law equation,non-Newtonian index(ζ)and consistency coefficient(μ)were calculated respectively for the six asphalts.The fluid properties of SBS modified asphalt and the dependence of viscosity on shear rate were analyzed.The results show that the Andrada equation can well describe the viscosity-temperature relationship for asphalts as well as modified asphalts and Ea can reflect the viscosity sensitivity to tempera-ture.The modification of SBS can significantly improve the viscosity of asphalt,but the temperature sensi-tivity for different modified asphalts is different.ζ-Values of SBS modified asphalts are all less than 1,in-dicating that the asphalts are converted from Newtonian fluid to non-Newtonian fluid,while the strength of non-Newtonian properties between different types of asphalt varies with temperature.The consistency coef-ficient(μ)decreases with the increase in temperature.
关键词
改性沥青/旋转黏度/黏温特性/流体行为/稠度系数Key words
modified asphalt/rotational viscosity/viscosity-temperature characteristics/fluid characteris-tic/consistency coefficient引用本文复制引用
基金项目
国家自然科学基金面上项目(52278426)
陕西省自然科学基金(2019JM195)
陕西省重点研发计划(2022SF-169)
中央高校基本科研业务费专项(300102212206)
出版年
2024
NETL
NSTL
万方数据