Effect of silica fume and fly ash admixtures on the corrosion behavior of AISI 304 embedded in concrete exposed in 3.5% NaCl solution

Baltazar Zamora, Miguel Ángel y Bastidas, David M. y Santiago Hurtado, Griselda y Mendoza Rangel, José Manuel y Gaona Tiburcio, Citlalli y Almeraya Calderón, Facundo y Bastidas, José María (2019) Effect of silica fume and fly ash admixtures on the corrosion behavior of AISI 304 embedded in concrete exposed in 3.5% NaCl solution. Materials, 12 (23). pp. 1-10. ISSN 1996-1944

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URL o página oficial: https://doi.org/10.3390/ma12234007

Resumen

The use of supplementary cementitious materials such as fly ash, slag, and silica fume improve reinforced concrete corrosion performance, while decreasing cost and reducing environmental impact compared to ordinary Portland cement. In this study, the corrosion behavior of AISI 1018 carbon steel (CS) and AISI 304 stainless steel (SS) reinforcements was studied for 365 days. Three different concrete mixtures were tested: 100% CPC (composite Portland cement), 80% CPC and 20% silica fume (SF), and 80% CPC and 20% fly ash (FA). The concrete mixtures were designed according to the ACI 211.1 standard. The reinforced concrete specimens were immersed in a 3.5 wt.% NaCl test solution to simulate a marine environment. Corrosion monitoring was evaluated using the corrosion potential (Ecorr) according to ASTM C876 and the linear polarization resistance (LPR) according to ASTM G59. The results show that AISI 304 SS reinforcements yielded the best corrosion behavior, with Ecorr values mainly pertaining to the region of 10% probability of corrosion, and corrosion current density (icorr) values indicating passivity after 105 days of experimentation and low probability of corrosion for the remainder of the test period.

Tipo de elemento:

Article

Palabras claves no controlados:

Concrete, Concrete admixtures, Corrosion, Marine environment, Silica fume, Fly ash

Materias:

CONACYT > Ingeniería y Tecnología
T Tecnología > TA Ingeniería General y Civil

Divisiones:

Ingeniería Mecánica y Eléctrica > Maestría en Ingeniería Aeronáutica con orientación en: Materiales, Estructuras, o Dinámica de Vuelo

Usuario depositante:

Dra Citlalli Gaona

Creadores:

Creador	Email	ORCID
Baltazar Zamora, Miguel Ángel	NO ESPECIFICADO	NO ESPECIFICADO
Bastidas, David M.	NO ESPECIFICADO	NO ESPECIFICADO
Santiago Hurtado, Griselda	NO ESPECIFICADO	NO ESPECIFICADO
Mendoza Rangel, José Manuel	NO ESPECIFICADO	NO ESPECIFICADO
Gaona Tiburcio, Citlalli	citlalli.gaonatbr@uanl.edu.mx	orcid.org/0000-0001-9072-3090
Almeraya Calderón, Facundo	facundo.almerayacl@uanl.edu.mx	orcid.org/0000-0002-3014-2814
Bastidas, José María	NO ESPECIFICADO	NO ESPECIFICADO