Browsing by Author "Di Maio, Ángel Antonio"

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    Propiedades de agregados finos reciclados y su relación con el hormigón de origen
    (2020) Sosa, María Eva; Zega, Claudio Javier; Di Maio, Ángel Antonio
    Existe en la actualidad un gran interés en el empleo de los agregados finos reciclados (AFR) en la elaboración de hormigones. Ello se debe a la sustentabilidad soslayada a nivel mundial en la extracción de arenas y a la necesidad de un tratamiento integral de los residuos de hormigón. El AFR resulta un remanente debido al empleo de la fracción gruesa del agregado reciclado, lo cual es una práctica que en Argentina ya se encuentra contemplada en la normativa. Los AFR presentan características distintivas frente a los agregados naturales. Es esperable que las propiedades del hormigón de origen determinen la calidad de los AFR. En este trabajo se presenta el programa experimental propuesto para determinar la vinculación de las características de distintos AFR con las propiedades del hormigón del cual provienen
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    Understanding the influence of properties of fine recycled aggregates on recycled concrete
    (2020) Sosa, María Eva; Zega, Claudio Javier; Di Maio, Ángel Antonio
    Scarcity of fine natural aggregates suitable for concrete, the pollution caused by their mining and the great environmental impact produced by the final disposal of waste concrete, have all motivated several studies about their use as recycled aggregates for concrete, particularly the fine fraction. The use of fine recycled concrete aggregates (FRCAs) is directly linked to the feasibility of obtaining target properties in concrete. Agreement about FRCA’s technical viability has not yet been achieved. In this paper, the properties of FRCA associated with different features of the parent concrete and with the performance of recycled aggregate concrete prepared with them were analysed. The results show that the FRCA paste content is not linked to the compressive strength level of the parent concrete. In addition, the total water-to-cement ratio in recycled aggregate concrete seems to have a greater influence on concrete performance compared with quality and composition of FRCA.