EVALUACION DE MACROCELDAS DE CORROSION EMBEBIDOS EN VIGAS DE CONCRETO REFORZADO BAJO AMBIENTE SALINO

Published on Jul 30, 2007
· DOI :10.22517/23447214.5125
J. L. Pérez7
Estimated H-index: 7
,
Citlalli Gaona3
Estimated H-index: 3
+ 3 AuthorsLeonel López1
Estimated H-index: 1
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Abstract
In this work, corrosion of reinforcing steel in concrete beams exposed to two environments was evaluated. The two environments used were: drinking water (white) and salt water (5% NaCl sol.) for 18-months. The concrete had a water/cement ratio of 0.40 and 0.60, respectively. Monitoring was carried out by measuring macrocell voltage and current, with open-circuit potentials and electrochemical noise. The results presented more probability of corrosion in beams immersed in salt water with higher water/cement ratios and reaching the system a state of passivation. The macrocells were very useful for analyzing the corrosion system and correlated electrochemical techniques.
References5
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#1W. John McCarter (Heriot-Watt University)H-Index: 8
#2Øystein Vennesland (NTNU: Norwegian University of Science and Technology)H-Index: 14
Abstract Whole-life costing and residual service-life prediction of structures require quantitative information on cover-zone properties and threshold values for corrosion initiation and, once initiated, the rate of corrosion. It is clear that there exists a need to determine those near-surface characteristics of concrete, which promote the ingress of gases and liquids containing dissolved contaminants. In addition, in-situ monitoring of the seasonal change in such properties could assist in mak...
152 CitationsSource
#1M. RaupachH-Index: 18
#2P. Schießl (TUM: Technische Universität München)H-Index: 1
Abstract Since 1990, a special macrocell system, the so-called anode-ladder-system, has been used world-wide to monitor the corrosion risk of new concrete structures, besides other systems. This sensor-system indicates the depth of the critical chloride content initiating corrosion, i.e. the critical depth of the reinforcement with respect to corrosion. Subsequently, the time-to-corrosion can be determined, enabling the owners of buildings to initiate preventive protection measures before cracks...
70 CitationsSource
#1William John McCarter (Heriot-Watt University)H-Index: 26
#2T. M. Chrisp (Heriot-Watt University)H-Index: 19
Last. Pam Basheer ('QUB': Queen's University Belfast)H-Index: 28
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Abstract With more demands being made on reinforced concrete, 100-year guarantees of durability will become a necessity. Lifetime calculations, and prediction of the residual service-life of structures, require quantitative information on cover-zone properties and threshold values for corrosion initiation. It is clear that there exists a need to determine quantitatively those near-surface characteristics of concrete which promote the ingress of gases and/or liquids containing dissolved contamina...
41 CitationsSource
Abstract Due to the large extent of corrosion problems in reinforced concrete structures all over the world the durability of concrete structures exposed to aggressive environments has become a problem of major importance. New results from research on chloride-induced corrosion of steel in concrete show that the corrosion mechanisms are quite complex. Normally locally separated anodically and cathodically acting steel surface areas are formed on the steel surface. As the cathodically acting stee...
147 CitationsSource
25 Citations
Cited By1
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#1Candelaria Tejada Tovar (University of Cartagena)H-Index: 6
#2Ángel Villabona Ortiz (University of Cartagena)H-Index: 5
Last. Modesto Barrios Fontalvo (University of Cartagena)
view all 3 authors...
El presente trabajo muestra un procedimiento experimental desarrollado durante 510 dias, para lo cual se conto con 4 probetas cilindricas de dos marcas diferentes de cemento y a dos relacion agua-cemento, donde se utilizo el metodo quimico de perfil de cloruros para determinar la corrosion; para ello se determino la concentracion de iones cloruros totales y solubles a partir de las normas ASTM-114 y ASTM C-1218 graficando % de cloruros Vs distancia radial para calcular el contenido critico de cl...
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