Influence of the slice position on chloride migration tests for concrete in marine conditions

• Published in: Marine structures Vol. 22; no. 2; pp. 128 - 141
• Main Authors: Medeiros, M.H.F., Filho, J. Hoppe, Helene, P.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-04-2009; Elsevier
• Subjects: Applied sciences; Building structure; Buildings. Public works; Chloride attack; Concrete; Construction (buildings and works); Corrosion; Durability; Durability. Pathology. Repairing. Maintenance; Exact sciences and technology; Marine; Marine environment; Migration test; Reinforced concrete structure; Variance analysis; Marine environment; Durability; Concrete; Migration test; Chloride attack; Variance analysis; Migration; Experimental study; Variance; Reinforced concrete; Penetration; Corrosion; Chlorides; Concrete construction; Test method; Diffusion coefficient; Comparative study
• ISSN: 0951-8339; 1873-4170
• DOI: 10.1016/j.marstruc.2008.09.003

Chloride migration tests are used to measure the concrete capacity to inhibit chloride attack. Many researchers carry out this test in a slice of concrete extracted from the central part of cylindrical specimens, discarding about 75% of the concrete used to mold the specimens. This fact generated the question: would it be possible to extract more slices from a same specimen without losing the confidence in the results? The main purpose of this work is to answer this question. Moreover, another aim of this study was to show the difference of chloride penetration between finished faces and the formwork surfaces of concrete beams and slabs. The results indicated that it is possible to use more slices of a single specimen for a chloride migration test. Moreover, it was demonstrated that there is a significant difference of chloride penetration between the finished surface and the formwork surface of the specimens.