Corrosion Performance Investigation of Reinforcement Bars Coated with Cement and Mineral Admixture Slurry

Abstract

Reinforcement corrosion is considered as one of the most important parameters determining the service life of reinforced concrete structures. In this study, an alternative method that protects reinforced concrete reinforcements against the effects of corrosion has been examined. Within the scope of the study, in addition to the traditionally produced reference reinforced concrete samples, reinforced concrete samples produced with mineral additive cement slurry coated reinforcements were prepared. In addition to silica fume at 30% of the cement amount by mass, blast furnace slag at 25% and 50% of the cement amount was used in mineral added cement slurries. According to the test results, it was determined that the slurry coating application decreased the corrosion potential values and the corrosion current density values of the reinforcements in the samples exposed to the wetting and drying cycles in the sodium chloride environment.

Keywords

• Rebar Corrosion
• Mineral Admixture
• Cement Slurry
• Wetting Drying Cycle

Mineral Katkılı Çimento Bulamacı Kaplanmış Betonarme Donatıların Korozyon Performansının İncelenmesi

Abstract

Günümüzde betonarme yapıların güvenli servis ömrünü belirleyen en önemli parametrelerden biri donatı korozyonu olarak değerlendirilmektedir. Bu çalışmada betonarme donatılarını korozyon etkilerine karşı koruyan alternatif bir yöntem incelenmiştir. Çalışma kapsamında geleneksel olarak üretilmiş referans betonarme numunelerin yanında, mineral katkılı çimento bulamacı kaplanmış donatılarla üretilen betonarme numuneler hazırlanmıştır. Mineral katkılı çimento bulamaçlarında çimento miktarının kütlece %30 oranında silis dumanına ilave olarak çimento miktarının kütlece %25 ve %50 oranlarında yüksek fırın cürufu kullanılmıştır. Deney sonuçlarına göre bulamaç kaplama uygulamasının sodyum klorür çözeltisinde ıslanma kuruma etkisine maruz kalan numunelerde donatıların korozyon potansiyeli değerlerini azalttığı ve korozyon akım yoğunluğu değerlerini düşürdüğü tespit edilmiştir.

Keywords

• Donatı Korozyonu
• Mineral Katkı
• Çimento Bulamacı
• Islanma Kuruma Çevrimi

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