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ZHANG Jiu-peng, ZHU Hong-bin, PEI Jian-zhong, LUO Zi-jun. Evaluation of asphalt demulsification and viscosity of modified asphalt emulsion mortar based on Gompertz model[J]. Journal of Traffic and Transportation Engineering, 2015, 15(5): 1-7. doi: 10.19818/j.cnki.1671-1637.2015.05.001
Citation: ZHANG Jiu-peng, ZHU Hong-bin, PEI Jian-zhong, LUO Zi-jun. Evaluation of asphalt demulsification and viscosity of modified asphalt emulsion mortar based on Gompertz model[J]. Journal of Traffic and Transportation Engineering, 2015, 15(5): 1-7. doi: 10.19818/j.cnki.1671-1637.2015.05.001
shu

Evaluation of asphalt demulsification and viscosity of modified asphalt emulsion mortar based on Gompertz model

doi: 10.19818/j.cnki.1671-1637.2015.05.001
  • 1.

    Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China

  • 2.

    Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana 61801, Illinois, USA

  • 3.

    Tongji Architectural DesignGroupCo., Ltd., Shanghai 200092, China

More Information
  • Author Bio:

    ZHANG Jiu-peng (1983-), male, associate professor, PhD, +86-29-62630058, zhjiupeng@163.com

  • Received Date: 2015-07-21
  • Publish Date: 2015-10-25
    Abstract
  • Aiming at the deficiency of quantitative evaluation on the demulsification time of modified asphalt emulsion, the different types of fine aggregates were added into modified asphalt emulsions to prepare the asphalt mortars, Gompertz model was applied to analyze the variation laws of mortar viscosity with time, and a mathematic model was established to quantitatively evaluate the demulsification of modified asphalt emulsion. Analysis result indicates that the initial viscosity of modified asphalt emulsion mortar is low, but increases with the demulsification time and finally tends to be stable. With the same size aggregates, the granite asphalt mortar has the biggest viscosity, the basalt asphalt mortar has smaller viscosity, and the limestone asphalt mortar has the smallest viscosity. However, the increasing rates of viscosity are basically same for the different types of asphalt mortars, and conform to the characteristic of growth function. Gompertz model can be used to reflect the variation laws of viscosity with time because the biggest relative error between the calculated and measured values is lower than 15%. Then, an evaluation index was proposed based on Gompertz model to evaluate the demulsification, and the viscosity variation of asphalt mortar is stable when the index value ranges from 0.97 to 1.00. At the moment, the modified asphalt completes the demulsification. On the other hand, the measured viscosity can be used to calculate the parameters of Gompertz model, and to predict the required time to complete the demulsification for the modified asphalt emulsion.

     

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