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Relation of Damage Variable and Gas Permeability Coefficient of Concrete under Stress

  • Guanbao Tang (唐官保)
  • Yan Yao (姚燕)Email author
  • Ling Wang
  • Suping Cui
  • Yin Cao
Cementitious Materials
  • 4 Downloads

Abstract

Compressive stress and tensile stress were applied to concrete specimens using test rigs designed by RILEM TC 246-TDC. Ultrasonic wave velocity and autoclam permeability system were used to characterize the damage variable and gas permeability coefficient of concrete, respectively. The experimental results show that the strain value of concrete increases with the increasing of stress level and loading time. The damage variable and gas permeability coefficient of concrete under compressive stress decrease at first and increase after a threshold value between 0 and 0.6. When the concrete is under tensile load, the damage variable and gas permeability coefficient increase with tensile stress, with a significant increase from 0.3 to 0.6 tensile stress. There is a strong linear relationship between the damage variable and the gas permeability coefficient, suggesting both as good indicators to characterize the damage of concrete under stress.

Key words

compression tension strain damage variable gas permeability coefficient 

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Copyright information

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

Authors and Affiliations

  • Guanbao Tang (唐官保)
    • 1
    • 2
  • Yan Yao (姚燕)
    • 1
    • 2
    Email author
  • Ling Wang
    • 2
  • Suping Cui
    • 1
  • Yin Cao
    • 2
  1. 1.College of Materials Science and EngineeringBeijing University of TechnologyBeijingChina
  2. 2.State Key Laboratory of Green Building MaterialsChina Building Materials AcademyBeijingChina

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