Physical and mechanical behavior of concrete specimens using recycled aggregate coated using recycled cement paste

Primer Autor
Letelier, Viviana
Co-autores
Wenzel, Bruno
Bustamante, Marion
Munoz, Pedro
Ortega, Jose Marcos
Loyola, Estefania
Título
Physical and mechanical behavior of concrete specimens using recycled aggregate coated using recycled cement paste
Editorial
ELSEVIER SCI LTD
Revista
CONSTRUCTION AND BUILDING MATERIALS
Lenguaje
en
Resumen
Various countries have implemented the use of recycled concrete aggregates (RCA) as an alternative to reduce the use of natural resources. The replacement of RCA for natural aggregates (NA) in concretes is limited to small percentages because of the quality of the old mortar which is still adhered to the RCA. This mortar is more porous and absorbent, weakening the RCA and causing losses in the physical and mechanical properties of new concretes. In addition, the smaller the particles, the greater the amount of adhered mortar, which is why its use in concrete is limited and the fine fraction tends to be discarded. In this study, the use of RCA coated with recycled binder paste (RBP) (smaller than 45 & mu,m) from the crushing of the RCA itself is sought to strengthen weak adhered mortar and improve the properties of the RCA through an economic and sustainable treatment by using the waste of the waste. Therefore, the mechanical, physical and chemical behavior and durability of the concretes are assessed by the use of RCA coated with RBP (replacing by 0%, 50% and 100%). The results indicate a reduction in the mechanical and physical properties of the concrete for the highest replacement percentage of RCA. Nevertheless, the coated recycled aggregate concrete (RAC) showed superior behavior to the untreated RAC, obtaining compressive strengths close to the control and a remarkable improvement in the physical assays.
Fecha Publicación
2023
Tipo de Recurso
artículo original
doi
10.1016/j.conbuildmat.2023.132015
Formato Recurso
PDF
Palabras Claves
Recycled aggregates
Concrete
Waste valorization
Surface treatment
Recycled cement
Aggregate characterization
Mechanical properties
Ubicación del archivo
Categoría OCDE
Construcción y tecnología de la edificación
Ingeniería
Ciencia de los materiales
Materias
Áridos reciclados
Concreto
Valorización de residuos
Tratamiento de superficies
Cemento reciclado
Caracterización agregada
Propiedades mecánicas
Identificador del recurso (Mandatado-único)
artículo original
Versión del recurso (Recomendado-único)
versión publicada
Derechos de acceso
metadata
Access Rights
metadata
Id de Web of Science
WOS:001028798800001
ISSN
0950-0618
Tipo de ruta
verde / hibrida
Categoría WOS
Construcción y tecnología de la edificación
Ingeniería
Ciencia de los materiales
Referencia del Financiador (Mandatado si es aplicable-repetible)
ANID-FONDECYT 1211135
ANID FONDECYT REGULAR 1211135
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