THE FIELD EXPERIMENT ON THE EFFECT OF REDUCING THE SALT SUPPLY TO THE PIER SUPERSTRUCTURE CONCRETE USING THE CURTAIN WALLS

Abstract

 It is a very important problem for maintenance of port and harbor structures that the reinforced concrete of superstructure on pier would be deteriorated from salt damage early on in many cases. In this study, some curtain walls that heights of the lower end were different from each other were hanged in front of superstructure on pier in operation for the purpose of reducing the number of occurrences of breaking waves under superstructure: the amount of generation of seawater spray. Concrete specimens that were installed to both beam and slab of superstructure behind curtain walls had been exposed to marine environment for one year or two years. According to chloride ion concentration measurement results of those specimens, the curtain wall reduced the amount of salt supply when its height of the lower end was lower than the height that was 0.8 of cumulative relative frequency of tidal height.