The Influence of Replacing Aggregates and Cement by LFS on the Corrosion of Steel Reinforcements

Abstract

The aim of this study is to investigate the corrosion behavior of steel reinforcement embedded in mortar specimens in which both the aggregate and cement are partially replaced by ladle furnace slag (LFS) and different percentages of chloride ions by weight of cement are introduced into the mix at the time of kneading. The corrosion behavior was studied by using electrochemical techniques in order to evaluate the corrosion rate and the symptoms produced in steels of specimens with and without slag LFS. From the analysis of the results, it is concluded that the use of LFS in a partial replacement of aggregate and cement in mortar specimens does not compromise the behavior of the mortar with regard to corrosion of the steel reinforcement; consequently, partial replacement by LFS is fully feasible from this standpoint.

Ladle furnace slag as a partial replacement of Portland cement

“…LFS naturally presents a granular dusty appearance with an average particle size distribution of 40-70% passing a 200-mesh sieve, with a maximum size of 2 mm [15][16][17]. Its density varies between 2.6-2.8 kg/m 3 [16,[18][19][20], with an specific surface area (SSA) around 2064-3091 cm 2 /g [15,[21][22][23][24]. Its chemical and mineralogical composition varies due to many factors of the refining process, even within the same plant [25][26][27][28].…”

Special Issue on “Advances in Organic Corrosion Inhibitors and Protective Coatings”

“…Moreover, it was concluded that the corrosion inhibition mechanism might be not only a simple physisorption process on the steel surface, but can also be explained in terms of chemisorption of polymer on the steel surface. The corrosion behavior of steel reinforcement incorporated in mortar specimens, in which both the cement and aggregate are partially substituted by ladle furnace slag (LFS) in respect of the presence of chloride ions, was investigated in the work of the Prieto et al [4]. Electrochemical techniques were used to estimate the corrosion rate as well as the symptoms created in steel rebars in the presence of LFS.…”