Influencia del residuo de mampostería en la resistencia de concretos autocompactantes al ataque por sulfato de sodio

Influence of masonry residue on the resistance of self-compacting concrete to the sodium sulfate attack

Contenido principal del artículo

Yimmy Fernando Silva Urrego
Silvio Delvasto

Resumen

En este trabajo se presentan resultados de un estudio experimental sobre la resistencia al ataque externo de sulfato de sodio (Na2SO4) en concretos autocompactantes (CACs) con residuo de mampostería (RM).  Los CACs presentaban un contenido de agua constante de 202,5 kg/m3 y diferentes volúmenes de RM (0%, 25% Y 50%) como reemplazo parcial de cemento Portland (OPC) expuesto a una solución de sulfato de sodio al 5%. Las propiedades en estado fresco como fluidez, capacidad de paso y resistencia a la segregación se evaluaron mediante el flujo de asentamiento, embudo en V y caja en L. En estado endurecido, la resistencia a la compresión y expansión fueron determinadas. Por otra parte, técnicas de difracción de rayos X (DRX), microscopia electrónica de barrido (MEB) y espectroscopia de Infrarrojo con transformada de Fourier (FTIR) fueron aplicadas en pastas para investigar los efectos de los sulfatos sobre la microestructura.  Los resultados mostraron que todas las mezclas cumplen las propiedades en estado fresco, además se encontró que cuando los CACs son inmersos en la solución de sulfato de sodio, el RM puede mejorar la resistencia de los CACs al ataque por sulfatos en comparación con el CAC solo de OPC.

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Biografía del autor/a (VER)

Yimmy Fernando Silva Urrego, Universidad del Valle

Y.F. Silva, completó su pregrado en Ing. de los Materiales en el 2011 en la Universidad del Valle, Cali, Colombia, es MSc. en Ingeniería -Énfasis en Ingeniería de los Materiales en la Universidad del Valle, Cali, Colombia. Actualmente es estudiante de Doctorado en Ingeniería con énfasis en materiales de la Universidad del Valle e investigador en el Grupo Materiales Compuestos (GMC). Su investigación se centra en la valorización de residuo de mampostería en concretos autocompactantes y su desempeño frente a diferentes ambientes (sulfatos, cloruros y carbonatación).

Silvio Delvasto, Universidad del Valle

Ing. Químico de la Universidad del Valle; Cali, Colombia, es MSc. de la University of Illinois at Chicago, USA y Dr. en Ingeniería de la Universidad Politécnica de Valencia, España. Su labor se centra en la caracterización de materiales de matriz cementicia, materiales no convencionales, propiedades, aplicaciones y procesos de producción de materiales inorgánicos, cerámicos y compuestos. Actualmente es profesor titular de la Universidad del Valle en la Escuela de Ingeniería de los Materiales

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