Limiting properties in the characterisation of mixed recycled aggregates for use in the manufacture of concrete

Agrela, F. and Sánchez de Juan, Marta and Ayuso, J. and Geraldes, Víctor Luis (2011). Limiting properties in the characterisation of mixed recycled aggregates for use in the manufacture of concrete. "Construction And Building Materials", v. 25 (n. 10); pp. 3950-3955. ISSN 0950-0618.

Description

Title: Limiting properties in the characterisation of mixed recycled aggregates for use in the manufacture of concrete
Author/s:
  • Agrela, F.
  • Sánchez de Juan, Marta
  • Ayuso, J.
  • Geraldes, Víctor Luis
Item Type: Article
Título de Revista/Publicación: Construction And Building Materials
Date: October 2011
Volume: 25
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería de Materiales [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

El objetivo principal de este trabajo de investigación es estudiar las propiedades del árido reciclado mixto para la fabricación de hormigón reciclado en aplicaciones no estructurales. Se ha realizado la caracterización completa de 35 muestras de áridos reciclados mixtos gruesos de distinta calidad, procedentes de 13 plantas de tratamiento diferentes de la geografía española. Se han estudiado las correlaciones que existen entre las diferentes propiedades, en particular, con la absorción de agua, el contenido de sulfatos y la composición. Se propone una clasificación de los áridos reciclados y se limita de forma indicativa el contenido de yeso para que una muestra de árido reciclado mixto cumpla con la limitación del 0,8% de los sulfatos solubles en ácido de la Instrucción EHE-08. Recycling of construction and demolition waste (CDW) has become a widespread concern in Spain for the last years, as a way to preserve natural resources and achieve a better control of waste disposal sites.Specific applications which make use of mixed recycled aggregates are of great importance, as this types of aggregates constitute the majority of the total production. Structural and non-structural concrete is one of the possible applications, being this the main goal of our study. This paper presents a study on the physical and chemical characteristics of mixed recycled aggregates which have been obtained from different CDW treatment plants of Spain. Correlations between the different properties were investigated in order to find criterions of acceptance for recycled aggregates to be used in concrete. The comparison between the properties offers the possibility of pre-selecting a great quantity of mixed recycled aggregates, these being suitable for either structural and non-structural concrete. The determination of water absorption and the gypsum content are good indicators in order to evaluate the quality of the mixed recycled aggregates for its application in the production of concrete.

More information

Item ID: 15825
DC Identifier: http://oa.upm.es/15825/
OAI Identifier: oai:oa.upm.es:15825
Official URL: http://www.sciencedirect.com/science/article/pii/S095006181100167X
Deposited by: Memoria Investigacion
Deposited on: 17 Oct 2013 12:11
Last Modified: 21 Apr 2016 16:07
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