Caracterización de la corrosión de concretos con mezclas ternarias

Published on Jul 30, 2007
· DOI :10.22517/23447214.5177
Erick Maldonado , Facundo Almeraya1
Estimated H-index: 1
+ 2 AuthorsMiguel Baltazar2
Estimated H-index: 2
Se estudiaron concretos adicionando ceniza volante, micro-silice y escoria de alto horno, el objetivo fue determinar cual de las mezclas presenta mejor comportamiento como proteccion contra la corrosion del acero. Se prepararon seis mezclas y se construyeron celdas de concreto donde se le adiciono el 20% con respecto al peso de aditivos, con dos varillas embebidas en la mezcla como electrodos y fueron expuestas a una solucion de NaCl (3.5% en peso), durante ocho meses se monitorearon con tecnicas electroquimicas. La mezcla que mejores caracteristicas obtuvo fue la que contenia 10% ceniza volante y 10% escoria de alto horno
#1Wichian Chalee (King Mongkut's University of Technology Thonburi)H-Index: 12
#2M. Teekavanit (King Mongkut's University of Technology Thonburi)H-Index: 1
Last. Chai Jaturapitakkul (King Mongkut's University of Technology Thonburi)H-Index: 42
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Abstract This investigation studied the effect of W/C ratio on covering depth required against the corrosion of embedded steel of fly ash concrete in marine environment up to 4-year exposure. Fly ash was used to partially replace Portland cement type I at 0%, 15%, 25%, 35%, and 50% by weight of cementitious material. Water to cementitious material ratios (W/C) of fly ash concretes were varied at 0.45, 0.55, and 0.65. The 200-mm concrete cube specimens were cast and steel bars with 12-mm diameter...
32 CitationsSource
#1Ketil Videm (University of Oslo)H-Index: 6
Abstract Steel electrodes have been exposed for 3.5 years in cement mortar with and without chloride and ELKEM micro-silica. Corrosion potentials in mortar without Cl − varied between −0.1 and +0.06 V(SCE), indicating passivity. One percentage of cement weight of Cl − reduced the corrosion potentials to about −0.2 V(SCE). Micro-silica in chloride containing mortar increased the severity of corrosion the first year. However, after 2 years exposure reduction of interconnected porosity and increase...
5 CitationsSource
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Last. Martin BojkoH-Index: 2
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The linear polarization is a non-destructive way of estimating the instantaneous corrosion rate of a metal. In case of reinforced concrete, the method is restricted mainly because of a concrete resistance, unknown area of the polarized reinforcement and non-uniform corrosion. In spite of that, thanks to the polarization resistance it is possible to estimate whether the reinforcement corrodes in activity or passivity. The results imply that sometimes even the knowledge of Rp is insufficient for s...
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The First International Symposium on Electrochemical Noise Measurement for Corrosion Applications was held in Montreal, Quebec, Canada on 15--16 May 1994. Electrochemical noise measurement (ENM) is a controversial subject. There are no established test methods, and there is no consensus on a theoretical framework for interpreting data. The ASTM Committee G-1 Task Group on ENM and the symposium authors were charged with the task of developing consensus on three basic issues: (1) how should a meas...
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