Abstract：To investigate the diffusion process of chloride ion in concrete under atmosphere environment, a series of tests were conducted under the
conditions of different salt-fog spray angle, environment temperature, mass concentration of sodium chloride solution and compressive stress level. The
results show that surface chloride ion mass fraction for specimens under different spray angles of salt-fog were different, which leads to a great change
of diffusion degree of chloride ions in concrete. The surface chloride ion mass fraction is high when the angle of erosion surface is 0° or 45°, which
causes severe erosion in concrete. The surface chloride ion mass fraction is increased with the increasing of mass concentration of sodium chloride solution until a stable value. The apparent diffusion coefficient of chloride ion is increased with the increasing of temperature, and decreased significantly with the increasing of compressive stress level due to the dense concrete by stress.
2013, Vol. 34 
