Effect of chloride penetration into concrete in maritime environment

U ovom radu promatran je utjecaj klorida na beton konstrukcija te mehanizam djelovanja klorida. Ispitivanje je provedeno na uzorcima uzetim s Krčkog mosta koji je primjer konstrukcije u maritimnoj sredini koja je izložena svakodnevnom utjecaju klorida. Osim toga, za potrebe ovog rada u laboratoriju su priređene betonske kocke različite recepture koje su odnjegovane u maritimnim uvjetima te su uspoređeni rezultati mehaničkih i kemijskih ispitivanja očvrsnulih kocki. Praškasti uzorci dobijeni su bušenjem rupa na odabranim elementima mosta Krk te je sadržaj klorida ispitan pomoću uređaja koji radi na temelju norme AASHTO T 260. Betonske kocke napravljene su i ispitane u Laboratoriju za materijale Građevinskog fakulteta Sveučilišta u Rijeci.In this paper is observed the effect of chloride in concrete structures and mechanism of activity of chloride in concrete elements. The observation was performed on samples from Krk bridge which is an example of the construction in maritime environment that is exposed to daily impact of chlorides. In addition, concrete cubes of different recipes are prepared in laboratory conditions and mechanically and chemically tested after treatment in sea water. Powder samples were obtained by drilling holes in selected elements of Krk bridge and the chloride content was examined by special probe. Concrete cubes were made and tested in the Laboratory for Materials in the Faculty of Civil Engineering, University of Rijeka. Key words