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Mechanical and microstructural characterization of non-structural precast concrete made with recycled mixed ceramic aggregates from construction and demolition wastes

Authors: Juan-Valdés, Andrés; Rodríguez-Robles, Desirée; García-González, Julia; Guerra-Romero, M. Ignacio; Morán-del Pozo, Julia Mª;

Mechanical and microstructural characterization of non-structural precast concrete made with recycled mixed ceramic aggregates from construction and demolition wastes

Abstract

La presión generada por las actividades de construcción ha comenzado a impactar negativamente en el medio ambiente. Una opción para mitigar estos impactos es la reutilización de los residuos de construcción y demolición como árido reciclado en la fabricación de hormigón no estructural. Por lo tanto, esta investigación compara los bordillos y adoquines convencionales de hormigón prefabricado no estructural con elementos reciclados fabricados con un reemplazo del 50% de áridos cerámicos mixtos reciclados pre-saturados. A pesar de observarse algunas reducciones en la resistencia a la compresión (-25.47%) y en la resistencia a la flexión (-5.77%); también se obtuvieron resultados prometedores en términos de la resistencia a la tracción (0.53%), la sólida unión exhibida por la Zona de Transición Interfacial (ITZ) entre los áridos reciclados y la pasta de cemento, así como la relativamente baja porosidad (12.44% con un bajo volumen de poros mayores de 2 μm). Esto confirma la viabilidad de emplear bordillos y adoquines reciclados.

The pressure caused by the construction activities has begun to take its toll on the environment. One option to alleviate the negative impacts is to reuse the construction and demolition wastes as recycled aggregate in the manufacture of non-structural concrete. Therefore, this research compares the recycled kerbstones and paving blocks made with a 50% replacement ratio of pre-saturated recycled mixed ceramic aggregates to the conventional non-structural precast concrete elements. Although some decreases in compressive (−25.47%) and flexural strength (−5.77%) were observed, the splitting tensile strength (0.53%), the strong bond exhibited by the ITZ between the recycled aggregates and the cement paste and the relatively low porosity (12.44% with a small volume of pores greater than 2 μm) showed promising results; thus proving the viability of using recycled kerbstones and paving blocks.

Ministerio de Economía y Competitividad. BIA 2013-48876-C3-3-R Empresas colaboradoras: Prefabricados de Hormigón Pavimentos Páramo S.L. and TEC-REC: Tecnología y Reciclado S.L.

peerReviewed

Country
Spain
Related Organizations
Keywords

Recycled mixed ceramic aggregates, Mechanical characterization, Bordillo, Paving Lock, Recycled concrete, Kerb, Microstructural characterization, Paving block, 2211.19 Propiedades Mecánicas, 3312 Tecnología de Materiales, Ingeniería agrícola, Áridos reciclados cerámicos mixtos, Precast, Prefabricado, Mechanical and microstructural characterization, Adoquín, 3305 Tecnología de la Construcción, Hormigón reciclado, 3305.05 Tecnología del Hormigón, Caracterización mecánica y microestructural

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    citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    68
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 1%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 10%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
68
Top 1%
Top 10%
Top 10%
Green