Cargando…
Recycled Aggregates Produced from Construction and Demolition Waste for Structural Concrete: Constituents, Properties and Production
This paper concerns the recovery of construction and demolition waste as coarse recycled aggregates for concrete. Coarse recycled aggregates may be used as a partial or total replacement of natural aggregates, contributing to the circular economy and minimizing landfill disposals as well as the cons...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510485/ https://www.ncbi.nlm.nih.gov/pubmed/34640143 http://dx.doi.org/10.3390/ma14195748 |
_version_ | 1784582583997169664 |
---|---|
author | Pacheco, João de Brito, Jorge |
author_facet | Pacheco, João de Brito, Jorge |
author_sort | Pacheco, João |
collection | PubMed |
description | This paper concerns the recovery of construction and demolition waste as coarse recycled aggregates for concrete. Coarse recycled aggregates may be used as a partial or total replacement of natural aggregates, contributing to the circular economy and minimizing landfill disposals as well as the consumption of natural mineral resources. However, construction and demolition waste is a heterogeneous material with undefined quality and the processing of this waste into recycled aggregates needs to ensure that the recycled aggregates have suitable properties for concrete. This paper summarizes several aspects related to coarse recycled aggregates, specifically addressing: (i) the typical composition of construction and demolition waste; (ii) the influence of different types of constituents on the properties of recycled aggregates and recycled aggregate concrete; (iii) requirements for recycled aggregates to be used in concrete; and (iv) production methods of recycled aggregates. It is argued that coarse recycled aggregates are a suitable construction material with adequate quality, even when common equipment is used in their production and preliminary separation as a key operation for ensuring the quality of the aggregates is recommended. |
format | Online Article Text |
id | pubmed-8510485 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-85104852021-10-13 Recycled Aggregates Produced from Construction and Demolition Waste for Structural Concrete: Constituents, Properties and Production Pacheco, João de Brito, Jorge Materials (Basel) Article This paper concerns the recovery of construction and demolition waste as coarse recycled aggregates for concrete. Coarse recycled aggregates may be used as a partial or total replacement of natural aggregates, contributing to the circular economy and minimizing landfill disposals as well as the consumption of natural mineral resources. However, construction and demolition waste is a heterogeneous material with undefined quality and the processing of this waste into recycled aggregates needs to ensure that the recycled aggregates have suitable properties for concrete. This paper summarizes several aspects related to coarse recycled aggregates, specifically addressing: (i) the typical composition of construction and demolition waste; (ii) the influence of different types of constituents on the properties of recycled aggregates and recycled aggregate concrete; (iii) requirements for recycled aggregates to be used in concrete; and (iv) production methods of recycled aggregates. It is argued that coarse recycled aggregates are a suitable construction material with adequate quality, even when common equipment is used in their production and preliminary separation as a key operation for ensuring the quality of the aggregates is recommended. MDPI 2021-10-01 /pmc/articles/PMC8510485/ /pubmed/34640143 http://dx.doi.org/10.3390/ma14195748 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 Pacheco, João de Brito, Jorge Recycled Aggregates Produced from Construction and Demolition Waste for Structural Concrete: Constituents, Properties and Production |
title | Recycled Aggregates Produced from Construction and Demolition Waste for Structural Concrete: Constituents, Properties and Production |
title_full | Recycled Aggregates Produced from Construction and Demolition Waste for Structural Concrete: Constituents, Properties and Production |
title_fullStr | Recycled Aggregates Produced from Construction and Demolition Waste for Structural Concrete: Constituents, Properties and Production |
title_full_unstemmed | Recycled Aggregates Produced from Construction and Demolition Waste for Structural Concrete: Constituents, Properties and Production |
title_short | Recycled Aggregates Produced from Construction and Demolition Waste for Structural Concrete: Constituents, Properties and Production |
title_sort | recycled aggregates produced from construction and demolition waste for structural concrete: constituents, properties and production |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510485/ https://www.ncbi.nlm.nih.gov/pubmed/34640143 http://dx.doi.org/10.3390/ma14195748 |
work_keys_str_mv | AT pachecojoao recycledaggregatesproducedfromconstructionanddemolitionwasteforstructuralconcreteconstituentspropertiesandproduction AT debritojorge recycledaggregatesproducedfromconstructionanddemolitionwasteforstructuralconcreteconstituentspropertiesandproduction |