Construction and demolition waste as recycled aggregate for environmentally friendly concrete paving

Contreras Llanes, Manuel; Bolívar Raya, Juan Pedro; Gázquez González, Manuel Jesús; Romero, Maximina

doi:10.1007/s11356-021-15849-4

Author

Contreras Llanes, Manuel ; Bolívar Raya, Juan Pedro ; Gázquez González, Manuel Jesús; Romero, Maximina
Publication Date

2021-09-10
Publisher

Springer
Citation

Contreras Llanes, M., Romero Pérez, M., Gázquez González, M. J., & Bolívar Raya, J. P. (2021). Construction and demolition waste as recycled aggregate for environmentally friendly concrete paving. In Environmental Science and Pollution Research. Springer Science and Business Media LLC. https://doi.org/10.1007/s11356-021-15849-4
Abstract

Recycled aggregates (RA) from construction and demolition waste (CDW) instead of natural aggregates (NA) were analysed in the manufacture of new eco-friendly concrete. Fine (FRA) and coarse (CRA) recycled aggregates were used in different percentages as substitutes of natural sand and gravel, respectively. The results revealed that the use of RA in percentages of up to 50wt.%is feasible. Additionally, RA were used to produce paving blocks in accordancewith industrial requirements. Thus, values of water absorption lesser than 6.0%and tensile strength upper than 3.6MPa were obtained, which are similar to those of a reference sample and within the limit values established by the regulations. These results were achieved by reducing the incorporation of cement, thereby saving production costs and minimizing environmental impact.
URI

http://hdl.handle.net/10272/20270

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ContrerasLlanes2021_Article_ConstructionAndDemolitionWaste.pdf	3.870Mb	PDF	View/Open	versión editor

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Construction and demolition waste as recycled aggregate for environmentally friendly concrete paving

Author

Contreras Llanes, Manuel UHU Authority

; Bolívar Raya, Juan Pedro UHU Authority

; Gázquez González, Manuel Jesús UHU Authority

; Romero, Maximina

Publication Date

2021-09-10

Publisher

Springer

Citation

Contreras Llanes, M., Romero Pérez, M., Gázquez González, M. J., & Bolívar Raya, J. P. (2021). Construction and demolition waste as recycled aggregate for environmentally friendly concrete paving. In Environmental Science and Pollution Research. Springer Science and Business Media LLC. https://doi.org/10.1007/s11356-021-15849-4

Abstract

Recycled aggregates (RA) from construction and demolition waste (CDW) instead of natural aggregates (NA) were analysed in the manufacture of new eco-friendly concrete. Fine (FRA) and coarse (CRA) recycled aggregates were used in different percentages as substitutes of natural sand and gravel, respectively. The results revealed that the use of RA in percentages of up to 50wt.%is feasible. Additionally, RA were used to produce paving blocks in accordancewith industrial requirements. Thus, values of water absorption lesser than 6.0%and tensile strength upper than 3.6MPa were obtained, which are similar to those of a reference sample and within the limit values established by the regulations. These results were achieved by reducing the incorporation of cement, thereby saving production costs and minimizing environmental impact.