Concrete Carbonation in Ibero-American Countries DURACON Project: Six-Year Evaluation

Rincón, Oriana; Montenegro, J.C.; Vera, Rosa; Carvajal, Ana María; Gutiérrez, Ruby Mejía de; Vasto, S. Del; Saborio, E.; Torres-Acosta, A. A.; Pérez-Quiroz, J. T.; Madrid, M Martinez; Alonso-Guzmán, Elia Mercedes; Castro-Borges, P.; Moreno, Éric I.; Almeraya-Calderón, Facundo; Gaona-Tiburcio, C.; Pérez-López, T.; Salta, Maria; Melo, Ana Paula de; Martínez, I.; Rebolledo, Nuria; Rodríguez, Guillermo Roa; Pedrón, Miguel; Millano, Valentina; Sánchez, M.; Partidas, E. de

doi:10.5006/1385

Cited by 10 publications

(4 citation statements)

References 13 publications

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“…7,11 Limiting to concrete made with limestone, values of carbonation rate are consistent with average data obtained within the "Validation testing program on chloride penetration and carbonation standardized test methods" of CEN/TR 17172 on concretes made with CEM II-A/LL-42.5R and water/cement ratio of 0.49 and 0.58 and exposed up to 2 years outdoor in different European locations. 20 Higher carbonation rates, at least on OPC concrete, were, conversely, obtained in tropical climate, characterized by highest temperature, 21 suggesting that temperature, but also relative humidity and time of wetness have a significant impact on carbonation.…”

Section: Carbonation Of Concretementioning

confidence: 98%

Service life of reinforced concrete structures made with blended cements and exposed in urban environment

Lollini

Redaelli

2021

Structural Concrete

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Carbonation-induced corrosion is one of the main causes of degradation of reinforced concrete (RC) structures exposed outdoor in urban environment. To prevent steel corrosion, a durability design, that considers both the initiation and the propagation time, is of fundamental importance. At this aim, the resistance to carbonation of concrete and the steel corrosion rate in the exposure environment need to be known. This paper reports the carbonation coefficient and the corrosion rate of 7-day cured RC specimens made with different binders and exposed outdoor in Milan in unsheltered conditions. Corrosion rates in laboratory conditions with different temperatures and relative humidities are also reported. Experimental data were used to evaluate the service life in unsheltered condition. RC specimens made with Portland cement exhibited the lowest carbonation coefficient and corrosion rate, while specimens with 30% limestone and with 70% ground granulated blast furnace slag the highest.

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Section: Carbonation Of Concretementioning

confidence: 98%

Service life of reinforced concrete structures made with blended cements and exposed in urban environment

Lollini

Redaelli

2021

Structural Concrete

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“…Se elaboraron 12 especímenes prismáticos de concreto (15 cm x 15 cm x 50 cm) pertenecientes al Proyecto DURACON (Figura 1a) (Troconis, et al, 2015;Troconis, et al, 2016;Troconis, 2006), 6 especímenes con acero de refuerzo y 6 sin refuerzo. Se utilizaron dos relaciones agua/ cemento (a/c), 0.65 y 0.45, tres especímenes por cada tipo, los cuales han estado expuestos por casi 20 años en un micro-ambiente marino en la Estación Meteorológica de la CONAGUA en Progreso, Yucatán aproximadamente a 1 km de la playa.…”

Section: Metodologíaunclassified

“…Las estructuras de concreto reforzado expuestas a un ambiente marino agresivo son vulnerables al ataque de varios iones dañinos como los iones cloruros (Cl -) (Sun, et al, 2022), los cuales aceleran la corrosión en el metal de refuerzo de estas estructuras. Este fenómeno ha sido estudiado en el Proyecto DURACON (Efecto del ambiente en la durabilidad del concreto reforzado) el cual investiga la influencia de los parámetros meteorológicos, urbanos y marinos en el comportamiento de las estructuras de concreto reforzado (Troconis, et al, 2015;Troconis, et al, 2016;Troconis, 2006). En este proyecto están involucrados 11 países en los cuales se distribuyeron un total de 46 sitios de prueba, uno de ellos en la Estación Meteorológica de la CONAGUA en Progreso, Yucatán.…”

Section: Introductionunclassified

Memorias del X Congreso Nacional de Alconpat México 2022

Borges¹,

Guzmán²,

López³

2023

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Alconpat México fue creada en abril del año 2002. Fue la primera delegación de Alconpat Internacional. Desde aquella época, y en cada año par, se ha llevado a cabo el Congreso Nacional de Alconpat México, que de cariño es llamado el Pre-Conpat. Desde aquel entonces, numerosas delegaciones nacionales se han creado año con año. En esta ocasión el comité organizador quizo hacer una celebración académica por los primeros 20 años. Esto implicó darle al congreso una imagen mística que incluye la presentación de una obra alusiva del famoso pintor Guido Farina y que engalana este libro de memorias. La obra consiste en una mano que evoca el mando de las diferentes directivas bajo la tutela del consejo fundador ilustrado con los nombres de las personas de éste en la forma de un halo. La mano sostiene una brújula que indica el camino de nuestra asociación, donde se encuentra el logo de Alconpat México y un Katun maya que representa el número 20, alusivo al 20 aniversario. Estamos muy contentos de compartir contigo ésta celebración académica.

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“…Carbonation is generally considered to follow a root-time relationship. Typically, it is assumed that the relationship does not change over the period being modelled, but there is data available that suggests this is not the case [27]. Unlike chloride penetration, carbonation is likely to be significantly affected by climate change as the levels of atmospheric carbon dioxide increase significantly.…”

Section: Modelling Carbonationmentioning

confidence: 99%

Limitations in Modelling Reinforced Concrete Durability

Atkins

Lambert

2022

CMD

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The design processes for reinforced concrete are changing. More often, durability targets are being achieved by using modelling. This paper compares some of the models available and the precision undertaken to obtain the data that underpins the calculations, and it reflects on the change in the environment that is known to be occurring. In addition, a review of the sustainability implications of durability is considered. It is concluded that there may be more sustainable methods to achieve a long life than simply increasing cement contents and covers.

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Concrete Carbonation in Ibero-American Countries DURACON Project: Six-Year Evaluation

Cited by 10 publications

References 13 publications

Service life of reinforced concrete structures made with blended cements and exposed in urban environment

Service life of reinforced concrete structures made with blended cements and exposed in urban environment

Memorias del X Congreso Nacional de Alconpat México 2022

Limitations in Modelling Reinforced Concrete Durability

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