搅拌过程中沥青混合料的离析  

Segregation of asphalt mixture in mixing process

作　　者：谢立扬[1] 赵利军[1] 姚运仕[1] 左文军[1] 

机构地区：[1]长安大学道路施工技术与装备教育部重点实验室,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2009年第5期116-121,共6页Journal of Chang’an University(Natural Science Edition)

基　　金：国家自然科学基金项目(50678062)

摘　　要：为了提高沥青混合料的搅拌均匀性,采用理论分析与试验相结合的方法,分析了搅拌缸几何参数、粉料和沥青撒布方式以及热料仓集料变异对沥青混合料离析的影响,提出了控制搅拌过程中沥青混合料离析的合理措施。研究结果表明:合理的搅拌缸几何参数应能保证缸内混合料良好的对流循环运动;沿搅拌轴纵向布置的粉料和沥青撒布方式优于在搅拌缸端部布置方式,应在结构允许条件下优先采用;热料仓进仓比例和振动筛筛孔尺寸应根据冷骨料级配进行合理选择。In order to improve mixing uniformity of asphalt mixture, a method of theoretical analysis and test was used to analyze the effects of geometric parameters of the mixer, delivery modes of power and asphalt, aggregate variation in hot aggregate tank on the segregation of asphalt mixture. Reasonable measures of controlling segregation in the mixing process were put forward. The results indicate that, the reasonable geometric parameters of the mixer should ensure ad-equate circulation flow of the mixture in the mixer; the longitudinal arrangement of power and asphalt delivery is superior to the arrangement at the end of mixer, so it should be firstly used under the optimization of structure; the delivery proportion of aggregate in hot aggregate tank and sieve size of vibrating screen should be properly selected according to the gradation of cold aggregate. 4 tabs, 10 figs, 9 refs.

关 键 词：机械工程 沥青混合料 强制搅拌设备 搅拌 离析 

分 类 号：U415.522[交通运输工程—道路与铁道工程]