En este trabajo se estudió el reemplazo de agregados reciclados y su efecto en la durabilidad, mediante el ensayo de migración de iones cloruro (NordTest 492) y el desarrollo de resistencia del concreto utilizando remplazos de30%, 50%, 75% y 100% de la fracción fina de los agregados. Los resultados mostraron que es factible el desarrollo de resistencias en concretos con reemplazos de 30% y 100%, del agregado normal por agregado fino reciclado; los porcentajes de reemplazo influyeron en la absorción capilar y en la migración de iones cloruro, modificando el comportamiento ante pruebas de durabilidad.
In this research, the synergetic effect of a super-absorbent polymer in combination with a calcium nitrite corrosion inhibitor were evaluated as a combined technology to improve concrete durability in High Performance Concrete. For this purpose, Portland cement mortars with a water/cement ratio of 0.4 and a substitution of 9.5% of cement by silica fume were produced. The effect of this technologies was evaluated by measuring the following parameters: autogenous and drying shrinkage, surface electrical resistivity and the non-steady-state chloride migration coefficient. The results indicate that the synergistic effect of SAP + CNI improves autogenous shrinkage and surface electrical resistivity.
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