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Factors affecting threshold chloride for reinforcement corrosion in concrete

✍ Scribed by S.E. Hussain; Rasheeduzzafar; A. Al-Musallam; A.S. Al-Gahtani

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 837 KB
Volume: 25
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(95)00148-6

No coin nor oath required. For personal study only.

✦ Synopsis

Three cements with variable CsA contents were mixed with different levels of chloride, alkali and sulfate contents to study the effect of these parameters on pore solution composition. Effect of exposure temperature was also studied by curing the chloride-treated specimens at 200 and 70°C. Pore solution was extracted using a high pressure pore solution extrusion device and analysed for chloride and hydroxyl ion concentrations. Threshold chloride for onset of reinforcement corrosion was computed using threshold [Cl-/OH-] ratio of 0.3. The results showed that CsA content and exposure temperature have very strong influence on threshold chloride content. Alkali content of cement has marginal effect whereas presence of sulfates along with chlorides has moderate effect on the threshold chloride content.

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