Corrosion Behavior of Rebars Embedded in Alkali-Activated and Conventional Reactive Powder Concretes

Authors : Hüseyin YİĞİTER, Ahsanollah BEGLARIGALE, Serdar AYDIN, Bülent BARADAN

Pages : 10359-10378

Doi:10.18400/tekderg.478154

View : 10 | Download : 5

Publication Date : 2020-11-01

Article Type : Research Paper

Abstract :The present study investigated the corrosion behavior of reinforcement bars embedded in alkali-activated insert ignore into journalissuearticles values(ARPC); and conventional insert ignore into journalissuearticles values(CRPC); reactive powder concretes. Corrosion progress in 3.5% NaCl solution, water and air environments were monitored up to 365 days. The physical and mechanical characteristics, such as water absorption, rapid chloride ion permeability, compressive and flexural strength, and corrosion characteristics, such as half cell potential and corrosion current intensity results were compared for ARPC and CRPC matrices. Even for the same mechanical performance, alkali-activated mortars were found to have a high permeable structure and an early depassivation of the rebars occurred. In the propagation stage of chloride induced corrosion, almost 13 times higher corrosion current intensity values were measured as well as earlier deterioration and cracking was observed for ARPC compared to CRPC.
Keywords : Reactive powder concrete, alkali activated slag, steel rebar, chloride induced corrosion