Title: Korozijski potencijal čelika ugrađenog u alkalno-aktiviranu zguru
Original Title: Corrosion potential of steel embedded in alkali-activated slag
Authors: Antonino Runci, Marijana Serdar
DOI: https://doi.org/10.5592/CO/PhDSym.2020.15
First page: 189 Last page: 196
Publish date print/online: 9/4/2020
Abstract: Alkali-Activated Materials (AAMs) are a group of free clinker binders that are based on aluminosilicate powder and an alkali activator. AAMs have shown high performance in many areas and have attracted great interest because of their lower environmental impact compared to ordinary Portland cement. The aim of this paper is to offer a first assessment on the safety of application of AAMs in marine environments, or where de-icing salts are used. The paper focuses on the alkali-activated ground-granulated blast furnace slag in combination with other by-products originating from Southeast Europe. The setup used to evaluate the corrosion behaviour consists of structural steel plates covered with a layer of mortar, and with tap water or a simulated seawater solution. The corrosion behaviour of structural steel plates was monitored by means of the Open Circuit Potential (OCP).
Keywords: alkali-activated material, slag, durability, corrosion potential, steel corrosion
Sažetak: Alkalno aktivirani materijali (AAM) su bezcementna veziva na bazi alumino-silikatnog praha i alkalnog aktivatora. Zbog smanjenog utjecaja na okoliš i visokih uporabnih svojstava, u usporedbi s običnim portlandskim cementom, ovakvi materijali privlače pozornost znanstvenika i industrije. Cilj ovog rada je pružiti prvu procjenu sigurne primjene AAM-a u morskom okolišu ili tamo gdje se koriste soli za odmrzavanje. U radu je korištena alkalno aktivirana granulirana zgura visokih peći u kombinaciji s ostalim industrijskim nusproizvodima s područja jugoistočne Europe u svrhu praćenja korozije. Korištena metoda sastoji se od konstrukcijskih čeličnih ploča prekrivenih slojem morta te slojem vode, odnosno slojem simulirane otopine morske vode. Korozijsko ponašanje konstrukcijskih čeličnih ploča praćeno je potencijalom otvorenog kruga (engl. Open Circuit Potential - OCP).
Ključne riječi: alkalno aktivirani materijal, zgura, trajnost, korozijski potencijal, korozija čelika