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Evolution and characterization of damage of concrete under freeze-thaw cycles

  • Ling Wang (王玲)
  • Yin Cao
  • Zhendi Wang
  • Peng Du
Cementitious Materials

Abstract

To study the internal damage of concrete under freeze-thaw cycles, concrete strains were measured using embedded strain gauges. Residual strain and coefficients of freezing expansion (CFE) derived from strain-temperature curves were used to quantify the damage degree. The experimental results show that irreversible residual strain increases with the number of freeze-thaw cycles. After 50 cycles, residual strains of C20 and C35 concretes are 320μɛ and 100μɛ in water, and 120 μɛ and 60 μɛ in saline solution, respectively. In lower temperature range (−10 °C to −25 °C) CFE of C20 and C35 concretes decrease by 9.82×10−6/K and 8.44×10−6/K in water, and 9.38×10−6/K and 5.47∼10−6/K in saline solution, respectively. Both residual strains and CFEs indicate that during the first 50 freeze-thaw cycles, the internal damage of concrete in saline solution is less than that of concrete in water. Thus residual strain and CFE can be used to measure the frost damage of concrete.

Key words

freeze-thaw cycles saline solution strain residual strain coefficients of freezing expansion 

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Copyright information

© Wuhan University of Technology and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Ling Wang (王玲)
    • 1
  • Yin Cao
    • 1
  • Zhendi Wang
    • 1
  • Peng Du
    • 1
  1. 1.State Key Laboratory of Green Building MaterialsChina Building Materials AcademyBeijingChina

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