Model of time-dependent and stress-dependent chloride penetration of concrete under sustained axial pressure in the marine environment

The effect of sustained compressive loading on the chloride penetration of concrete was investigated and a self-monitoring loading device was developed. A series of prisms were loaded under five different sustained axial stress levels and four different numbers of wet/dry chloride cycles. Both the apparent chloride diffusion coefficient D-a and the surface chloride concentration C-s values were time and stress dependent with a sudden change threshold value of approximately 0.3 f(c). A model was proposed to predict the chloride penetration profiles of concrete under sustained axial pressure, taking both the time dependent and the stress-dependent characteristics of D-a and C-s into account. (C) 2018 Elsevier Ltd. All rights reserved.