Assessment of mechanical, thermal, mineral and physical properties of fired clay brick made by mixing kaolinitic red clay and paper pulp residues
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http://hdl.handle.net/10045/112011
Título: | Assessment of mechanical, thermal, mineral and physical properties of fired clay brick made by mixing kaolinitic red clay and paper pulp residues |
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Autor/es: | Muñoz, Pedro | Letelier, Viviana | Bustamante, Marion | Ortega, José Marcos | Sepúlveda, J.G. |
Grupo/s de investigación o GITE: | Durabilidad de Materiales y Construcciones en Ingeniería y Arquitectura |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Ingeniería Civil |
Palabras clave: | Clay brick | Kaolin | Paper residue | Recycling | Waste |
Área/s de conocimiento: | Ingeniería de la Construcción |
Fecha de publicación: | 15-nov-2020 |
Editor: | Elsevier |
Cita bibliográfica: | Applied Clay Science. 2020, 198: 105847. https://doi.org/10.1016/j.clay.2020.105847 |
Resumen: | Among the largest producers of waste, the paper industry stands out due to its impact on human health and ecological balance. However, these residues may also contribute to a more environmental friendly brick industry, since the incorporation of fluxing agents may improve the firing process and the induced porosity reduces thermal conductivity of fired bricks. Therefore, this study aims to assess the feasibility of replacing clay with solid paper residue (PPR) from 2.5 to 17.5% in order to reduce resources depletion and improve brick performance. The original clay was characterized as a non-calcareous red clay with high contents of kaolinite. Several samples were made by extrusion and fired at 900 °C in accordance with industrial procedures. The addition of PPR led to increase shrinkage from 5 to 10% due to the effect of fluxing oxides which reduced pores volume and enlarged pores size. In addition, the impervious fraction was slightly reduced while the apparent porosity certainly increased (i.e. approx. 17%) due to the macroscopic pores developed by PPR combustion. This porosity produces lighter bricks (i.e. density decays from 1.76 to 1.39 g dm−3) with lower thermal conductivity (i.e. from 5.53 to 0.41 W m−1 K−1) but also reduces compressive strength (i.e. from 11 to 3 MPa) and increases water absorption (i.e. up to 24%). Nevertheless, toxicity is below the regulatory limits in all cases and fired bricks are easily adaptable to industrial procedures. |
Patrocinador/es: | It must be noticed that this work was supported by the Chilean National Commission on Research and Development (CONICYT) [grant number FONDECYT REGULAR 1180414]. Technical and human support provided by CICT of Universidad de Jaén (UJA, MINECO, Junta de Andalucía, FEDER) and by Centro de Manejo de Residuos y Energía (BIOREN) Universidad de la Frontera (Chile) are gratefully acknowledged. |
URI: | http://hdl.handle.net/10045/112011 |
ISSN: | 0169-1317 (Print) | 1872-9053 (Online) |
DOI: | 10.1016/j.clay.2020.105847 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2020 Elsevier B.V. |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1016/j.clay.2020.105847 |
Aparece en las colecciones: | INV - DMCIA - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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Munoz_etal_2020_ApplClaySci_final.pdf | Versión final (acceso restringido) | 6,7 MB | Adobe PDF | Abrir Solicitar una copia |
Munoz_etal_2020_ApplClaySci_revised.pdf | Versión revisada (acceso abierto) | 1,98 MB | Adobe PDF | Abrir Vista previa |
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