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Recycled Aggregates from Construction and Demolition Waste in the Manufacture of Urban Pavements
Construction and Demolition Waste (CDW) is among the largest waste streams in the world. Therefore, within the Circular Economy concept, there is a growing interest in its reuse. The purpose of this work was to study the use of recycled aggregates (RAs) obtained by a specific separation method from...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8585343/ https://www.ncbi.nlm.nih.gov/pubmed/34772131 http://dx.doi.org/10.3390/ma14216605 |
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author | Contreras-Llanes, Manuel Romero, Maximina Gázquez, Manuel Jesús Bolívar, Juan Pedro |
author_facet | Contreras-Llanes, Manuel Romero, Maximina Gázquez, Manuel Jesús Bolívar, Juan Pedro |
author_sort | Contreras-Llanes, Manuel |
collection | PubMed |
description | Construction and Demolition Waste (CDW) is among the largest waste streams in the world. Therefore, within the Circular Economy concept, there is a growing interest in its reuse. The purpose of this work was to study the use of recycled aggregates (RAs) obtained by a specific separation method from CDW, replacing natural aggregates (NAs) in the manufacture of precast concrete elements, such as kerbstones and paver blocks. The physical and technological properties of precast products formulated with RAs were analysed in accordance with current regulations, comparing them with those of commercial products manufactured with NAs. The results indicated that partial or total substitution of NAs by RAs increased the water absorption and apparent porosity values of the precast elements while reducing the bulk density and compressive strength. However, all units manufactured with RAs showed breaking load values higher than the minimum required by EN 1338 and, in some cases, slightly higher average tensile strength values than the reference material. In addition, some of the compositions including RAs gave rise to pieces that, according to their flexural strength, were classified as class 1 and marked S in accordance with EN 1340. According to abrasion resistance, in most cases, the precast elements are classified as Class 4 and I (≤20 mm). Finally, precast concrete produced from RAs satisfies the tolerance requirements for classification as class 3 (≤1.5 kg m(−2)). Therefore, it could be suitable for use in high pedestrian or traffic areas. |
format | Online Article Text |
id | pubmed-8585343 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-85853432021-11-12 Recycled Aggregates from Construction and Demolition Waste in the Manufacture of Urban Pavements Contreras-Llanes, Manuel Romero, Maximina Gázquez, Manuel Jesús Bolívar, Juan Pedro Materials (Basel) Article Construction and Demolition Waste (CDW) is among the largest waste streams in the world. Therefore, within the Circular Economy concept, there is a growing interest in its reuse. The purpose of this work was to study the use of recycled aggregates (RAs) obtained by a specific separation method from CDW, replacing natural aggregates (NAs) in the manufacture of precast concrete elements, such as kerbstones and paver blocks. The physical and technological properties of precast products formulated with RAs were analysed in accordance with current regulations, comparing them with those of commercial products manufactured with NAs. The results indicated that partial or total substitution of NAs by RAs increased the water absorption and apparent porosity values of the precast elements while reducing the bulk density and compressive strength. However, all units manufactured with RAs showed breaking load values higher than the minimum required by EN 1338 and, in some cases, slightly higher average tensile strength values than the reference material. In addition, some of the compositions including RAs gave rise to pieces that, according to their flexural strength, were classified as class 1 and marked S in accordance with EN 1340. According to abrasion resistance, in most cases, the precast elements are classified as Class 4 and I (≤20 mm). Finally, precast concrete produced from RAs satisfies the tolerance requirements for classification as class 3 (≤1.5 kg m(−2)). Therefore, it could be suitable for use in high pedestrian or traffic areas. MDPI 2021-11-02 /pmc/articles/PMC8585343/ /pubmed/34772131 http://dx.doi.org/10.3390/ma14216605 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Contreras-Llanes, Manuel Romero, Maximina Gázquez, Manuel Jesús Bolívar, Juan Pedro Recycled Aggregates from Construction and Demolition Waste in the Manufacture of Urban Pavements |
title | Recycled Aggregates from Construction and Demolition Waste in the Manufacture of Urban Pavements |
title_full | Recycled Aggregates from Construction and Demolition Waste in the Manufacture of Urban Pavements |
title_fullStr | Recycled Aggregates from Construction and Demolition Waste in the Manufacture of Urban Pavements |
title_full_unstemmed | Recycled Aggregates from Construction and Demolition Waste in the Manufacture of Urban Pavements |
title_short | Recycled Aggregates from Construction and Demolition Waste in the Manufacture of Urban Pavements |
title_sort | recycled aggregates from construction and demolition waste in the manufacture of urban pavements |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8585343/ https://www.ncbi.nlm.nih.gov/pubmed/34772131 http://dx.doi.org/10.3390/ma14216605 |
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