不同制备方法的橡胶沥青黏度特性对比分析  

Comparative Analysis of Viscosity Characteristic of Rubber Asphalt with Different Preparation Methods

作　　者：栗培龙[1,2] 王霄 孙胜飞 马云飞[1] LI Peilong;WANG Xiao;SUN Shengfei;MA Yunfei(School of Highway,Chang’an University,Xi’an 710064,China;Key Laboratory of Highway Structure&Materials of Ministry of Transport,Chang’an University,Xi’an 710064,China)

机构地区：[1]长安大学公路学院,西安710064 [2]长安大学道路结构与材料交通行业重点实验室,西安710064

出　　处：《硅酸盐通报》2021年第9期3159-3167,共9页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金面上项目(51878061)。

摘　　要：为了明确制备方法和工艺条件对橡胶沥青黏度特性的影响,在不同制备温度、制备时间、胶粉粒径及胶粉掺量条件下,采用高速剪切和机械搅拌两种方式制备橡胶沥青,对比分析了两种制备体系橡胶沥青黏度变化规律及黏度构成差异。采用Arrhenius方程计算了两种体系橡胶沥青的黏流活化能(Eη),探究了其黏流特性的差异及温度敏感性。结果表明:两种制备体系的橡胶沥青黏度随制备温度、制备时间的增加及胶粉粒径的减小先增大后减小,在135℃、150℃以及165℃测试条件下,剪切橡胶沥青的黏度大于搅拌体系,而在180℃条件下呈现出相反规律;随胶粉掺量的增加,二者的黏度不断增大,且搅拌体系的黏度始终大于剪切体系。剪切体系的Eη大于搅拌体系,表明剪切体系橡胶沥青的黏度主要源于胶粉和沥青的交互作用,温度敏感性更强,而搅拌橡胶沥青的黏度主要来自胶粉的位阻效应,自身稳定性更好。In order to clarify the influence of preparation methods and process conditions on the viscosity characteristic of rubber asphalt,it was prepared by high-speed shear and mechanical mixing under different preparation temperature,preparation time,rubber powder particle size and rubber powder content.The viscosity variation trend and viscosity composition differences of rubber asphalt between the two preparation systems were compared and analyzed.The Arrhenius equation was used to calculate the viscous flow activation energy(Eη)of two kinds of rubber asphalt,and the difference of viscous flow characteristics and temperature sensitivity was explored.The results show that the viscosity of rubber asphalt of the two preparation systems first increases and then reduces with the increase of preparation temperature,preparation time and the decrease of rubber powder particle size,and the viscosity of shear rubber asphalt is higher than that of mixing system at 135℃,150℃and 165℃,but it presents the opposite rule at 180℃.With the increase of the amount of rubber powder,the viscosity of the two systems increases,and the viscosity of the mixing system is always greater than that of the shear system.The viscous flow activation energy of shear system is larger than that of mixing system,which indicates that the viscosity of shear system rubber asphalt mainly comes from rubber powder/asphalt interaction,and the shear rubber asphalt is more sensitive to temperature,while the viscosity of mixing rubber asphalt mainly comes from the steric effect of rubber powder and the stability is better than that of the shear system.

关 键 词：橡胶沥青 搅拌工艺 剪切工艺 影响因素 黏度特性 黏流活化能 

分 类 号：U414[交通运输工程—道路与铁道工程]