A Modulus Variation Model of Concrete under External Sulfate Attack: New Perspective from Statistical Evolution of Microcracks

  • Hao Zhang (张浩)
  • Wei She (佘伟)Email author
Cementitious Materials


A numerical model was proposed to describe the modulus variation of mortar exposed to external sulfate attack and the effectivity was verified by experiments. The model joints statistical evolution of microcracks to effective elastic modulus with microcracks and is applied to predict the damage degree of mortar attacked by sulfate. The experimental results show that the model can predict the modulus variation development of the specimen and the microcraks density. The elastic modulus values calculated by the model are consistent with that measured by experiments. The model focuses on nucleation of microcracks and finds that the theoretical results of microcracks number density show a linear growth over time in mortar. Compared with other sulfate attack damage model, this model provides a more suitable damage evolution equation that can be used to analyze the chemically assisted damage.

Key words

sulfate attack effective elastic modulus microcracks number density damage evolution 


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Copyright information

© Wuhan University of Technology and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Material Science and EngineeringSoutheast UniversityNanjingChina
  2. 2.State Key Laboratory of High Performance Civil Engineering MaterialNanjingChina

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