Corrosion behavior of reinforcement bars embedded in mortar specimens containing ladle furnace slag in partial substitution of aggregate and cement

• Published in: Construction & building materials Vol. 38; pp. 188 - 194
• Main Authors: Prieto, M.I., Cobo, A., Rodríguez, A., Calderón, V.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-01-2013; Elsevier B.V
• Subjects: Cement; Chemical properties; Corrosion; Corrosion and anti-corrosives; LFS; Mechanical properties; Mortar; Rebars; Slag; Spain; Slag; LFS; Rebars; Mortar; Corrosion
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2012.08.044

► Corrosion potentials decrease with the increase of humidity and the chloride ions. ► The increase in the humidity content, produces the increase in corrosion rate. ► Mortars with 0% and 0.4% chloride ions, reach corrosion rates for passive state. ► Mortars with 0.8%, 1.2% and 2% chloride ions, reach corrosion rate for active states. ► Mortars of reference and with LFS in presence of chlorides, behave in a similar way.
Corrosion will inevitably affect steel reinforcement bars embedded in mortar specimens. In this study, we examine the corrosion of rebars embedded in mortar made with Ladle Furnace Slag (LFS), in partial substitution of aggregate and cement. Prismatic specimens measuring 6×8×2cm3 were prepared with variable amounts of chloride ions. Subsequently, their behavior in the presence of steel corrosion was analyzed by electrochemical techniques. Our analysis of the results concludes that rebar behavior in the LFS specimens is similar to rebar behavior in the conventional mortars that were used as the reference specimens.