Characterization of Three Types of Recycled Aggregates from Different Construction and Demolition Waste: An Experimental Study for Waste Management

Pablo Saiz Martínez (), Daniel Ferrández, Alberto Melane-Lavado and Alicia Zaragoza-Benzal
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Pablo Saiz Martínez: Department of Financial Economics, Accounting and Modern Language, Rey Juan Carlos University, Paseo de los Artilleros, s/n, 28032 Madrid, Spain
Daniel Ferrández: Department of Financial Economics, Accounting and Modern Language, Rey Juan Carlos University, Paseo de los Artilleros, s/n, 28032 Madrid, Spain
Alberto Melane-Lavado: Department of Financial Economics, Accounting and Modern Language, Rey Juan Carlos University, Paseo de los Artilleros, s/n, 28032 Madrid, Spain
Alicia Zaragoza-Benzal: Departamento de Tecnología de la Edificación, Universidad Politécnica de Madrid, Avenida Juan de Herrera 6, 28040 Madrid, Spain

IJERPH, 2023, vol. 20, issue 4, 1-19

Abstract: Achieving sustainable management and efficient use of natural resources stands out as one of the goals included in the Goals for Sustainable Development in the 2030 Agenda. The construction sector is currently far from presenting an efficient model in terms of treating waste generated by it. Variations in the physical and chemical properties of recycled aggregates coming from construction and demolition waste are one of the main reasons of their limited use in the production of construction materials. This research presents a physicochemical characterization of three different types of recycled aggregates coming from different types of waste: concrete, ceramic and mixed. Physical characterization shows that recycled concrete aggregate has better physical properties compared with mixed recycled aggregate and ceramic recycled aggregate, which makes it more suitable for use in masonry mortars and concrete, due to its higher dry density (2210.33 kg/m 3 ), its lower content of fines (5.17%), its lower friability coefficient (24.60%), and its water absorption coefficient (6.70%). Chemical characterization shows that none of the tested recycled aggregates contains traces of harmful chemical agents that exceed the limits established by the reference regulations. Finally, the statistical analysis shows good homogeneity for these raw materials, obtaining low coefficients of variation and values within the recommended in each of the calculated confidence intervals.

Keywords: physicochemical characterization; recycled aggregates; construction and demolition waste (CDW); homogeneity (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2023
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