Carbonation depth in 57 years old concrete structures

	Steel and Composite Structures Volume 19, Number 4, October 2015, pages 953-966 DOI: http://dx.doi.org/10.12989/scs.2015.19.4.953
	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
Address
	(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.