Increased Durability of Concrete Made with Fine Recycled Concrete Aggregates Using Superplasticizers
Autor
Cartuxo, Francisco
De Britto, Jorge
Evangelista, Luis
Jiménez Romero, José Ramón
Ledesma, Enrique F.
Editor
MDPIFecha
2016Materia
Fine recycled aggregateSuperplasticizers
Durability
Water absorption
Chloride resistance
Carbonation resistance
METS:
Mostrar el registro METSPREMIS:
Mostrar el registro PREMISMetadatos
Mostrar el registro completo del ítemResumen
This paper evaluates the influence of two superplasticizers (SP) on the durability properties
of concrete made with fine recycled concrete aggregate (FRCA). For this purpose, three families of
concrete were tested: concrete without SP, concrete made with a regular superplasticizer and concrete
made with a high-performance superplasticizer. Five volumetric replacement ratios of natural sand by
FRCA were tested: 0%, 10%, 30%, 50% and 100%. Two natural gravels were used as coarse aggregates.
All mixes had the same particle size distribution, cement content and amount of superplasticizer.
The w/c ratio was calibrated to obtain similar slump. The results showed that the incorporation
of FRCA increased the water absorption by immersion, the water absorption by capillary action,
the carbonation depth and the chloride migration coefficient, while the use of superplasticizers
highly improved these properties. The incorporation of FRCA jeopardized the SP’s effectiveness.
This research demonstrated that, from a durability point of view, the simultaneous incorporation of
FRCA and high-performance SP is a viable sustainable solution for structural concrete production