Atmospheric chloride penetration into concrete in semitropical marine environment

✍ Scribed by M.A. Mustafa; K.M. Yusof

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 662 KB
• Volume: 24
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(94)90190-2

✦ Synopsis

An atmospheric chloride content measurement was performed on air-dried concrete specimens in a marine environment under different conditions of exposure. The chloride content in the concrete generally increased with the test period and decreased with the depth of penetration, but the quantity of chloride depended on the exposure conditions of specimens. The test results suggest that each part of a concrete structure must be examined rigorously, if the differential chloride ion penetrations are to be properly forecast. Based on the chloride ion concentration profiles respecting concrete depth, surface chloride contents and diffusion coefficients of chloride were determined by using the standard diffusion equation as an experimental formula. The time-dependence of the two parameters indicates that upon using a diffusion coefficient with a constant surface value, chloride profiles predicted by the standard diffusion equation may not correlate well with the measured data on existing concrete structures of different ages. 662