Akademik Veri Yönetim Sistemi
MATERIALS LETTERS, cilt.57, sa.21, ss.3222-3233, 2003 (SCI-Expanded)
The corrosion of steel reinforcement is the most significant factor of deterioration in reinforced concrete structures. Corrosion of embedded steel in concrete may occur as a result of the depassivating effects of sulfate ions. Corrosive ions around the steel, at the passive state, destroy the reinforced concrete. To improve the mechanical and physical properties of concrete and to increase the corrosion resistance of steel embedded in concrete, silica fume (SF) and blast furnace slag (BFS) were used at different ratios instead of portland cement (PC). The workability, dry unit weight, the compressive strength and capillarity coefficient of the samples without steel reinforcement were determined. The corrosion current densities were measured by the linear polarization technique on the 28th, 75th, 150th and 250th days. Finally, it was observed that the samples with 10% SF+20% BFS had the highest compressive strength and the lowest capillarity coefficient. The concrete samples with 10% SF+40% BFS and 0.35 water-binder ratios (W/C) had the lowest corrosion current density. As a result, it can be concluded that the mineral admixtures improved the compressive strength, capillarity coefficient and corrosion current density. (C) 2003 Elsevier Science B.V. All rights reserved.