Accelerated and natural carbonation of concretes with internal curing and shrinkage/viscosity modifiers

Durán Herrera, Alejandro y Mendoza Rangel, José Manuel y Santos Rodríguez, Edgar Ulises de los y Vázquez, F. y Valdez Tamez, Pedro Leobardo y Bentz, Dale P. (2015) Accelerated and natural carbonation of concretes with internal curing and shrinkage/viscosity modifiers. Materials and structures, 48 (4). pp. 1207-1214. ISSN 1359-5997

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Abstract In many parts of the world, corrosion of reinforcing steel in concrete induced by carbonation of the concrete continues to be a major durability concern. This paper investigates the accelerated and natural carbonation resistance of a set of seven concretes, specifically evaluating the effects of internal curing and/or shrinkage/viscosity modifiers on carbonation resistance. In addition to five different ordinary portland cement (OPC) concretes, two concretes containing 20 % of a Class F fly ash as replacement for cement on a mass basis are also evaluated. For all seven concrete mixtures, a good correlation between accelerated (lab) and natural (field) measured carbonation coefficients is observed. Conversely, there is less correlation observed between the specimens’ carbonation resistance and their respective 28 days compressive strengths, with the mixtures containing the shrinkage/viscosity modifier specifically exhibiting an anomalous behavior of higher carbonation resistance at lower strength levels. For both the accelerated and natural exposures, the lowest carbonation coefficients are obtained for two mixtures, one containing the shrinkage/viscosity modifier added in the mixing water and the other containing a solution of the same admixture used to pre-wet fine lightweight aggregate. Additionally, the fly ash mixtures exhibited a significantly higher carbonation coefficient in both exposures than their corresponding OPC concretes.

Tipo de elemento: Article
Palabras claves no controlados: Accelerated testing, Carbonation, Fly ash, Internal curing, Natural exposure, Viscosity modifier
Materias: T Tecnología > TA Ingeniería General y Civil
T Tecnología > TH Construcción de Edificios
Divisiones: Ingeniería Civil
Instituto de Ingeniería Civil
Usuario depositante: Dr. Francisco Vazquez-Rodriguez
Creadores:
CreadorEmailORCID
Durán Herrera, AlejandroNO ESPECIFICADONO ESPECIFICADO
Mendoza Rangel, José ManuelNO ESPECIFICADONO ESPECIFICADO
Santos Rodríguez, Edgar Ulises de losNO ESPECIFICADONO ESPECIFICADO
Vázquez, F.NO ESPECIFICADONO ESPECIFICADO
Valdez Tamez, Pedro LeobardoNO ESPECIFICADONO ESPECIFICADO
Bentz, Dale P.NO ESPECIFICADONO ESPECIFICADO
Fecha del depósito: 18 Mayo 2016 20:47
Última modificación: 07 Mar 2024 16:28
URI: http://eprints.uanl.mx/id/eprint/10115

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