STRENGTHENING OF FRAME COLUMNS CONTAINING CHLORIDE ION BY REPLACING CONCRETE

It was presented that the phenomenon and cause of crack rebar corrosion of frame columns according to case histories.It was also pointed out that a higher content of chloride ion in concrete was the main cause of rebar corrosion.it was finally proposed the scheme of replacing all the concrete containing chloride ion in the columns by replaced concrete strengthening,whose construction key points were given.