Techno Press

Steel and Composite Structures   Volume 19, Number 4, October 2015, pages 953-966
Carbonation depth in 57 years old concrete structures
Ronaldo A. Medeiros-Junior, Maryangela G. Lima, Ricardo Yazigi, and Marcelo H.F. Medeiros

Abstract     [Full Text]
    Carbonation depth was verified in 40 points of two 57 years old concrete viaducts. Field testing (phenolphthalein spraying) was performed on the structures. Data obtained were statistically analyzed by the Kolmogrov-Smirnov's test, one-way analysis of variance (ANOVA's test), and Fisher's method. The results revealed significant differences between maximum carbonation depths of different elements of the same concrete structure. Significant differences were also found in the carbonation of different concrete structures inserted in the same macroclimate. Microclimatic factors such as temperature and local humidity, sunshine, wind, wetting and drying cycles, among others, may have been responsible by the behavior of carbonation in concrete.
Key Words
    concrete structures; environment; field testing; viaducts; statistical
(1) Ronaldo A. Medeiros-Junior, Marcelo H.F. Medeiros:
Department of Civil Construction, Federal University of Parana (UFPR), Jardim das Americas - Curitiba, Parana, Brazil;
(2) Maryangela G. Lima, Ricardo Yazigi:
Department of Civil Engineering, Aeronautics Institute of Technology (ITA), Marechal Eduardo Gomes, 50, Sao Jose dos Campos, Sao Paulo, Brazil.

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