Demulsification process of asphalt emulsion in fresh cement-asphalt emulsion paste

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• 作者：Jian Ouyang ; Yiqiu Tan ; Yunliang Li ; Jiuye Zhao
• 关键词：Demulsification ; Asphalt emulsion ; Particle size distribution ; Viscosity ; CA paste
• 刊名：Materials and Structures
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：48
• 期：12
• 页码：3875-3883
• 全文大小：911 KB
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• 作者单位：Jian Ouyang (1)
  Yiqiu Tan (1)
  Yunliang Li (1)
  Jiuye Zhao (1)
  
  1. School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin, China
  
• 刊物类别：Engineering
• 刊物主题：Structural Mechanics
  Theoretical and Applied Mechanics
  Mechanical Engineering
  Operating Procedures and Materials Treatment
  Civil Engineering
  Building Materials
  
• 出版者：Springer Netherlands
• ISSN：1871-6873

文摘

The demulsification process of asphalt emulsion in fresh cement asphalt emulsion (CA) paste was investigated by measuring the viscosity and the particle size distribution of CA paste. The morphology evolution of asphalt droplets was also observed by optical microscope. Superplasticizer was used to adjust different demulsifying speed of asphalt emulsion in CA paste. Results indicate that the viscosity development of CA paste can reflect the demulsification process of asphalt emulsion in CA paste. The demulsification process of asphalt emulsion in CA paste has two main stages under the continual induction effect of cement hydration. Asphalt droplets in CA paste are firstly coalesced to big droplets, and then recover their adhesive force. In the first stage, the viscosity of CA paste increases little with the changing particle size distribution. However, the viscosity of CA paste increases sharply in the second stage. Keywords Demulsification Asphalt emulsion Particle size distribution Viscosity CA paste