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
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Abstract
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
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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...
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#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...
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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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