Development of corrosion of steel bars embedded in mortar made with slag from secondary metallurgy

Prieto Barrio, Maria Isabel and Cobo Escamilla, Alfonso and Rodríguez Sáiz, Ángel and Manso Villalaín, Juan Manuel (2011). Development of corrosion of steel bars embedded in mortar made with slag from secondary metallurgy. In: "Eurocorr 2011. Developing Solutions for the Global Challenge", 04/09/2011 - 08/09/2011, Estocolmo, Suecia. pp. 1-13.

Description

Title: Development of corrosion of steel bars embedded in mortar made with slag from secondary metallurgy
Author/s:
  • Prieto Barrio, Maria Isabel
  • Cobo Escamilla, Alfonso
  • Rodríguez Sáiz, Ángel
  • Manso Villalaín, Juan Manuel
Item Type: Presentation at Congress or Conference (Article)
Event Title: Eurocorr 2011. Developing Solutions for the Global Challenge
Event Dates: 04/09/2011 - 08/09/2011
Event Location: Estocolmo, Suecia
Title of Book: proceedings of Eurocorr 2011. Developing Solutions for the Global Challenge
Date: 2011
Subjects:
Faculty: E.U. de Arquitectura Técnica (UPM)
Department: Tecnología de la Edificación
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The aim of this work is to study the evolution of the corrosion rate of reinforcements embedded in mortar specimens that have been partly or fully replaced by the sand ladle furnace white slag. Prisms are manufactured mortar 6cm x 8cm x 2cm in which are embedded reinforcing steel bars of 6mm diameter B500SD. At the time of mixing were added varying amounts of chloride ion content by weight of cement (0%, 0.4%, 0.8%, 1.2%, 2%). The specimens were made totally or partially replacing the white slag, getting four different mixes depending on the degree of substitution. After curing the specimens for 28 days in moist chambers proceeded to dry up naturally. Here are gradually dampened by its conservation in a moist chamber, periodically measuring the corrosion rate of the bars using the technique of polarization curve. The results, in terms of corrosion current and corrosion potential, were compared with those obtained on standard samples, without replacement by slag aggregate. The analysis of results allows us to know, depending on the type of mortar used, the chloride threshold with the depassivation produced steel and the corrosion rates achieved in steels in the active state in terms of mortar moisture, obtained from qualitatively using gravimetric techniques. The results achieved to date support the conclusion that no significant differences in the behavior against corrosion induced by chloride ions, between the steel bars embedded in standard samples and the steel bars embedded in samples including with aggregates from slag. Both the chloride threshold resulting in the depassivation steel as the corrosion rate reached through the bars in an active state are very similar in both types of mortars when they have the same moisture content.

More information

Item ID: 12764
DC Identifier: http://oa.upm.es/12764/
OAI Identifier: oai:oa.upm.es:12764
Official URL: http://eurocorr.org/index.php?id=48430&site=eurocorr
Deposited by: Memoria Investigacion
Deposited on: 14 Nov 2012 12:05
Last Modified: 21 Apr 2016 12:02
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