Seawater with different salt concentration and different infiltration frequency were simulated to carry out seawater erosion test on standard formed concrete specimens and determine chloride ion content.The determination of internal free chloride ion content,fitting of surface chloride ion content curve,and study on the surface chloride ion concentration time rule were conducted under different salinity.The content of free chloride ions at different depths under different infiltration frequency was determined,and the relationship between surface chloride ion concentration and different infiltration frequency was analyzed and studied.The results show that the content of free chloride in concrete increases with the increase of salinity and erosion time.The temporal evolution of chloride ion concentration on concrete surface meets the power index model,and the power index parameter varies with the change of infiltration frequency.Within a certain age,the law of the influence of salinity on the chloride ion concentration on the concrete surface meets the logarithmic function model.When the infiltration frequency is low,the chloride ion penetration of concrete increases with the increase of the frequency.When the infiltration frequency is increased to 12 times/d the infiltration rate of chloride ions slows down and the content of free chloride ions in concrete decreases.
维普
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