Interaction and multiscale mechanics

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Deterioration of tensile behavior of concrete exposed to artificial acid rain environment

  • Fan, Y.F. (Institute of Road and Bridge Engineering, Dalian Maritime University) ;
  • Hu, Z.Q. (Institute of Civil and Hydraulic Engineering, Dalian University of Technology) ;
  • Luan, H.Y. (Institute of Road and Bridge Engineering, Dalian Maritime University)
  • Received : 2011.05.03
  • Accepted : 2012.02.16
  • Published : 2012.03.25
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Abstract

This study is focused on evaluation of the tensile properties of concrete exposed to acid rain environment. Acid rain environment was simulated by the mixture of sulfate and nitric acid in the laboratory. The dumbell-shaped concrete specimens were submerged in pure water and acid solution for accelerated conditioning. Weighing, tensile test, CT, SEM/EDS test and microanalysis were performed on the specimens. Tensile characteristics of the damaged concrete are obtained quantitatively. Evolution characteristics of the voids, micro cracks, chemical compounds, elemental distribution and contents in the concrete are examined. The deterioration mechanisms of concrete exposed to acid rain are well elucidated.

Keywords

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