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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
  • 7 Downloads

Abstract

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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References

  1. [1]
    Mehta PK, Monteiro PJM. Concrete: Microstructure, Properties and Materials[M]. 3rd ed. New York: McGraw–Hill, 2006Google Scholar
  2. [2]
    Irassar EF, Bonavetti VL, Gonzalez M, Microstructural Study of Sul–Fate Attack on Ordinary and Limestone Portland Cements at Ambient Temperature[J]. Cement and Concrete Research, 2003, 33: 31–41Google Scholar
  3. [3]
    Gollop RS, Taylor HFW, Microstructural and Microanalytical Studies of Sulfate Attack. I. Ordinary Portland Cement Paste[J]. Cement and Concrete Research, 1992, 22: 1 027–1 038CrossRefGoogle Scholar
  4. [4]
    Cohen MD. Modeling of Expansive Cements[J]. Cement and Concrete Research, 1983, 13: 519–528CrossRefGoogle Scholar
  5. [5]
    Cohen MD. Theories of Expansion in Sulfoaluminate–type Expansion Cements: Schools of Thought[J]. Cement and Concrete Research, 1983, 13: 809–818CrossRefGoogle Scholar
  6. [6]
    Skalny J, Marchand J, Odler I. Sulfate Attack on Concrete[M]. 1th ed. London:Spon Press, 2002Google Scholar
  7. [7]
    Evans LS. Salt Crystallization and Rock Weathering[J].Review of Geomorphologie Dynamique, 1969, 70: 153–177Google Scholar
  8. [8]
    Scherer GW. Stress from Crystallization of Salt[J]. Cement and Concrete Research, 2004, 34: 1 613–1 624Google Scholar
  9. [9]
    Yang R, Lawrence CD, Lynsdale CJ, et al. Delayed Ettringite Formation in Heat–cured Portland Cement Mortars[J]. Cement and Concrete Research, 1999, 29: 17–25CrossRefGoogle Scholar
  10. [10]
    Prince W, Espangne M, Aitcin PC. Ettringite Formation: A Crucial Step in Cement Super Plasticizes Compatibility[J]. Cement and Concrete Research, 2003, 33: 635–641CrossRefGoogle Scholar
  11. [11]
    Tixier R, Mobasher B. Modeling of Damage in Cement–based Materials Subjected to External Sulfate Attack. I: Formulation[J]. Journal of Material of Civil Engineering, 2003, 15: 305–313Google Scholar
  12. [12]
    Tixier R, Mobasher B. Modeling of Damage in Cement–based Materials Subjected to External Sulfate Attack. II: Comparison with Experiments [J]. Journal of Material of Civil Engineering, 2003, 15: 314–322Google Scholar
  13. [13]
    Krajcinovic D, Basista M, Mallick K. Chemo–micromechanics of Brittle Solid[J]. Journal of the Mechanic and the Physic of Solid, 1992, 40: 965–990CrossRefGoogle Scholar
  14. [14]
    Basista M, Weglewski W. Micromechanical Modeling of Sulphate Corrosion in Concrete: Influence of Ettringite Forming Reaction[J]. Theoretical Applied Mechanic, 2008, 35: 29–52CrossRefGoogle Scholar
  15. [15]
    Chen JK, Qian C, Song H. A New Chemo–mechanical Model of Damage in Concrete under Sulfate Attack[J]. Construction and Building Material, 2016, 115: 536–543CrossRefGoogle Scholar
  16. [16]
    Sarkar S, Mahadevan S, Meeussen JCL. Numerical Simulation of Cementitious Materials Degradation under External Sulfate Attack[J]. Cement and Concrete Composites, 2010, 32: 241–252CrossRefGoogle Scholar
  17. [17]
    Leea H, Codyb RD, Codyb AM, et al. The Formation and Role of Ettringite in Iowa Highway Concrete Deterioration[J]. Cement and Concrete Research, 2005, 35: 332–343CrossRefGoogle Scholar
  18. [18]
    Paul B, Hooton RD. Ettringite and Thaumasite Formation in Laboratory Concretes Prepared Using Sulfate–resisting[J]. Cement and Concrete Composites, 2002, 24: 361–370CrossRefGoogle Scholar
  19. [19]
    Krajcinovic D. Damage Mehcanics[J]. Mechanics and Material, 1989, 8: 117–197CrossRefGoogle Scholar
  20. [20]
    Huang Y, Hu K, Chandra A. A Generalized Sellf–consistent Mechanics Method for Microcracked Solid[J]. Journal of the Mechanic and the Physic of Solid, 1994, 42: 1 273–1 291CrossRefGoogle Scholar
  21. [21]
    Ke FJ, Bai YL, Xia MF. Formulation of Statistical Evolution of Microcracks in Solid[J]. China Science(A), 1990, 20: 621–631Google Scholar
  22. [22]
    Curran DR, Seaman L, Shockey DA. Dynamic Failure of Solids[J]. Physics Report, 1987, 147: 253–388CrossRefGoogle Scholar
  23. [23]
    Karihaloo BL. Fracture Mechanics and Structural Concrete[M]. London: Longman Scientific & Technical, 1995Google Scholar
  24. [24]
    Budiansky B, Vonnell R. Elastic Moduli of a Crack Solid[J]. International Journal of Solids Structure, 1976, 12: 81–97CrossRefGoogle Scholar
  25. [25]
    Su XP. Research on the Concrete Durability Due to Salinized Soil in the Western Region of Jilin Province[D]. Jilin: Jilin University, 2013Google Scholar
  26. [26]
    Jin ZQ. Durability and Service Life of Concrete Exposed to Harsh Environment in West of China[D]. Jiangsu: Southeast University, 2006Google Scholar
  27. [27]
    Cao YH. Study on the Evolution of Dynamic Mechanics Properties of Mortar under Sulfate Erosion[D]. Zhejiang: Ningbo University, 2007Google Scholar

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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