Modeling and Software Development of the Interfacial Transition Zone of Ellipsoidal Aggregate in Cement-Based Composites

  • Jianjian Zhang (张建建)
  • Lijuan Zhang
  • Guowen Sun (孙国文)Email author
  • Caihui Wang
Cementitious Materials


The interfacial transition zone (ITZ) between the aggregates and the bulk paste is the weakest zone of ordinary concrete, which largely determines its mechanical and transporting properties. However, a complete understanding and a quantitative modeling of ITZ are still lacking. Consequently, an integrated modeling and experimental study were conducted. First, the theoretical calculation model of the ITZ volume fraction about the rotary ellipsoidal aggregate particles was established based on the nearest surface function formula. Its calculation programs were written based on Visual Basic 6.0 language and achieved visualization and functionalization. Then, the influencing factors of ITZ volume fraction of the ellipsoidal aggregate particles and the overlapping degree between the ITZ were systematically analyzed. Finally, the calculation models of ITZ volume fraction on actual ellipsoidal aggregate were given, based on cobblestones or pebbles particles with naturally ellipsoidal shape. The results indicate that the calculation model proposed is highly reliable.

Key words

interfacial transition zone (ITZ) cement-based composites ellipsoidal aggregate volume fraction visualization software development 


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Copyright information

© Wuhan University of Technology and Springer-Verlag GmbH Germany, Part of Springer Nature 2019

Authors and Affiliations

  • Jianjian Zhang (张建建)
    • 1
  • Lijuan Zhang
    • 2
  • Guowen Sun (孙国文)
    • 1
    Email author
  • Caihui Wang
    • 1
  1. 1.School of Materials Science and EngineeringShijiazhuang TieDao UniversityShijiazhuangChina
  2. 2.Foundational Subjects DepartmentShijiazhuang TieDao University SiFang CollegeShijiazhuangChina

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