Primeras experiencias en el estudio electroquímico de la eficiencia de un aditivo formulado en el Instituto Superior Politécnico "José Antonio Echeverría" en la reducción de la corrosión en el acero de refuerzo en probetas de mortero.

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Title:	Primeras experiencias en el estudio electroquímico de la eficiencia de un aditivo formulado en el Instituto Superior Politécnico "José Antonio Echeverría" en la reducción de la corrosión en el acero de refuerzo en probetas de mortero.
Alternate Title:	Firsts experiences in the electrochemical study efficiency of the additive formulated in the Higher Polytechnic Institute in the steel corrosion reduction in mortar probes.
Authors:	Martín, Yarelys¹ yarelys.martin@cnic.edu.cu, Castañeda, Abel¹, Montejo, Raúl² rmontejo@quimica.cujae.edu.cu, Baltazar, Miguel A.³ miguelbz_75@yahoo.com
Source:	Revista CENIC Ciencias Quimicas. 2009, Vol. 40 Issue 4, Special section p1-12. 13p.
Subjects:	CEMENT admixtures, LIGNOSULFONATES, STEEL corrosion, ELECTROCHEMICAL chloride extraction from reinforced concrete, CORROSION of reinforcing bars, REINFORCED concrete corrosion, PREVENTION
Geographic Terms:	CUBA
Abstract (English):	The classification of admixture like water reducers in plasticizers and superplasticizers is based according to their constituent material, its action and effects. The aim of this work was based on demonstrating a first experience in the electrochemical evaluation of the efficiency of a admixture Cuban in reducing steel reinforcement corrosion. Four probes were prepared with cement mortar with two steel bars inside. Two probes were prepared with the admixture in the mixing water from the mortars mixture with one of these as a bath additive on the bars. The other two probes the admixture was applied only in the bar leaving the other as a reference. These probes were in a high level aggressivity corrosion that facilitates the direct influence of chloride ions. For the evaluation of the efficiency was necessary to obtain the electrochemical corrosion rate values through five electrochemical techniques. The efficiency was confirmed with the diffusion coefficient and concentration of chloride ions on the surfaces in each probe. According to the efficiency obtained in the three probes and the behaviour of the diffusion coefficient of chloride ions, the lignosulfonate could be applied in the mixing water of mortar mix or concrete and like bath in the steel. [ABSTRACT FROM AUTHOR]
Abstract (Spanish):	La clasificación de los aditivos como reductores de agua en plastificantes y superplastificantes se basa de acuerdo al material que los constituyen, su acción y efectos. El objetivo de este trabajo se basó en demostrar una primera experiencia en la evaluación electroquímica de la eficiencia de un aditivo cubano en la reducción de la corrosión en el acero de refuerzo. Se elaboraron cuatro probetas de mortero a base de cemento con dos varillas de acero en su interior. Dos probetas se elaboraron con el aditivo en el agua de amasado de la mezcla del motero una de estas con el aditivo como baño en la varilla. Las otras dos probetas, una se le aplicó solamente el aditivo en la varilla quedando la otra como referencia. Estas probetas permanecieron en un medio de elevado nivel de agresividad corrosiva que facilita la influencia directa de los iones cloruro. Para la evaluación de la eficiencia fue necesario obtener los valores de velocidad electroquímica de corrosión a partir de cinco técnicas electroquímicas. La eficiencia fue confirmada con el coeficiente de difusión y la concentración de iones cloruro en las superficies de cada una de las probetas. De acuerdo a la eficiencia obtenida en las tres probetas y el comportamiento del coeficiente de difusión de iones cloruro; el lignosulfonato pudiera ser aplicado en el agua de amasado de la mezcla del mortero o el hormigón y como baño en las armaduras. [ABSTRACT FROM AUTHOR]
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Database:	MedicLatina

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Abstract:	The classification of admixture like water reducers in plasticizers and superplasticizers is based according to their constituent material, its action and effects. The aim of this work was based on demonstrating a first experience in the electrochemical evaluation of the efficiency of a admixture Cuban in reducing steel reinforcement corrosion. Four probes were prepared with cement mortar with two steel bars inside. Two probes were prepared with the admixture in the mixing water from the mortars mixture with one of these as a bath additive on the bars. The other two probes the admixture was applied only in the bar leaving the other as a reference. These probes were in a high level aggressivity corrosion that facilitates the direct influence of chloride ions. For the evaluation of the efficiency was necessary to obtain the electrochemical corrosion rate values through five electrochemical techniques. The efficiency was confirmed with the diffusion coefficient and concentration of chloride ions on the surfaces in each probe. According to the efficiency obtained in the three probes and the behaviour of the diffusion coefficient of chloride ions, the lignosulfonate could be applied in the mixing water of mortar mix or concrete and like bath in the steel. [ABSTRACT FROM AUTHOR]
ISSN:	10158553