TY - GEN
T1 - Concrete carbonation in iberoamerican countries duracon project
T2 - 18th International Corrosion Congress 2011
AU - Trocónis De Rincon, Oladis M.
AU - Sánchez, Miguel
AU - Millano, Valentina
AU - Fernández, Rafael
AU - De Partidas, Emilia Anzola
AU - Martínez, Isabel
AU - Rebolledo, Nuria
AU - Barboza, Mirta
AU - Montenegro, Juan C.
AU - Vera, Rosa
AU - Carvajal, Ana Maria
AU - De Gutiérrez, Ruby Mejia
AU - Maldonado, Jorge
AU - Guerrero, Carmen
AU - Saborio-Leiva, Erika
AU - Villalobos-Gonzalez, Catalina
AU - Pérez-Quiroz, José T.
AU - Torres-Acosta, Andres
AU - Castro-Borges, Pedro
AU - Moreno, Eric I.
AU - Pérez-López, Tezozomoc
AU - Almeraya-Calderón, Facundo
AU - Martinez-Molina, Wilfrido
AU - Martínez-Madrid, Miguel
AU - Salta, Manuela
AU - De Melo, Ana Paula
AU - Rodríguez, Gerardo
AU - Pedrón, Miguel
AU - Derrégibus, Marité
PY - 2011
Y1 - 2011
N2 - This investigation presents some of the results from an Iberoamerican project called "Effect of the environment on reinforcement durability" (DURACON) in its six years period. This project correlates the influence of urban and marine meteorochemical parameters on the performance of reinforced concrete structures. The present paper presents the results from 16 test sites distributed among nine countries (Bolivia, Chile, Colombia, Costa Rica, Mexico, Spain, Uruguay, Portugal and Venezuela). The environment was evaluated using ISO Standard 9223 and the concrete was characterized physically by measuring compressive strength, elastic modulus, total and effective porosity, as well as the effective porosity and resistance to water absorption using the Fagerlund method. To that effect, concrete specimens (with and without reinforcement) were prepared for electrochemical and physical/mechanical/chemical tests using the existing materials in each participating country, following strict procedures which enabled the preparation of similar concrete specimens. Two water/cement (w/c) ratios (0.45 and 0.65) were selected, where 0.45 w/c ratio concrete had a minimum cement content of 400 kg/m 3 and the one with 0.65 w/c ratio a minimum 28-day compressive strength of 210 kg/cm 2. Type I Portland cement, siliceous sand, and crushed rock as coarse aggregates (13-mm maximum nominal size) were used. After a one-year exposure period, the results of the corrosion potentiality and probability analysis of the reinforcement in the different test stations show that the concrete prepared in Venezuela is the one that has the greatest probability of carbonation-induced corrosion of the reinforcement, with the test site at Cali, Colombia being the one that would induce least corrosion. These results are comparable with those found using electrochemical measurements, after a six-year exposure period. The results also showed high carbonation aggressiveness of the tropical environments, being Venezuela one of the countries in Iberoamerica, with the most aggressive ones.
AB - This investigation presents some of the results from an Iberoamerican project called "Effect of the environment on reinforcement durability" (DURACON) in its six years period. This project correlates the influence of urban and marine meteorochemical parameters on the performance of reinforced concrete structures. The present paper presents the results from 16 test sites distributed among nine countries (Bolivia, Chile, Colombia, Costa Rica, Mexico, Spain, Uruguay, Portugal and Venezuela). The environment was evaluated using ISO Standard 9223 and the concrete was characterized physically by measuring compressive strength, elastic modulus, total and effective porosity, as well as the effective porosity and resistance to water absorption using the Fagerlund method. To that effect, concrete specimens (with and without reinforcement) were prepared for electrochemical and physical/mechanical/chemical tests using the existing materials in each participating country, following strict procedures which enabled the preparation of similar concrete specimens. Two water/cement (w/c) ratios (0.45 and 0.65) were selected, where 0.45 w/c ratio concrete had a minimum cement content of 400 kg/m 3 and the one with 0.65 w/c ratio a minimum 28-day compressive strength of 210 kg/cm 2. Type I Portland cement, siliceous sand, and crushed rock as coarse aggregates (13-mm maximum nominal size) were used. After a one-year exposure period, the results of the corrosion potentiality and probability analysis of the reinforcement in the different test stations show that the concrete prepared in Venezuela is the one that has the greatest probability of carbonation-induced corrosion of the reinforcement, with the test site at Cali, Colombia being the one that would induce least corrosion. These results are comparable with those found using electrochemical measurements, after a six-year exposure period. The results also showed high carbonation aggressiveness of the tropical environments, being Venezuela one of the countries in Iberoamerica, with the most aggressive ones.
KW - Carbonation
KW - Corrosion
KW - Reinforced concrete
KW - Tropical environment
UR - http://www.scopus.com/inward/record.url?scp=84867267303&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84867267303
SN - 9781618393630
T3 - 18th International Corrosion Congress 2011
SP - 466
EP - 478
BT - 18th International Corrosion Congress 2011
Y2 - 20 November 2011 through 24 November 2011
ER -
