Characterization of Three Types of Recycled Aggregates from Different Construction and DemolitionWaste: An Experimental Study forWaste Management
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2023-02-19
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MDPI
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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/m3), 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.
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Saiz Martínez, P., Ferrández, D., Melane-Lavado, A., & Zaragoza-Benzal, A. (2023). Characterization of Three Types of Recycled Aggregates from Different Construction and Demolition Waste: An Experimental Study for Waste Management. International Journal of Environmental Research and Public Health, 20(4), 3709.
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