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Utilization of Crushed Pavement Blocks in Concrete: Assessment of Functional Properties and Environmental Impacts

Production of concrete is connected to extensive energy demands, greenhouse gases production or primary sources depletion. Reflecting current economical, social, or environmental trends, there is strong pressure on mitigation these requirements and impacts. The exploitation of secondary- or waste ma...

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Autores principales: Kočí, Václav, Kočí, Jan, Fořt, Jan, Fiala, Lukáš, Šál, Jiří, Hager, Izabela, Černý, Robert
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658445/
https://www.ncbi.nlm.nih.gov/pubmed/34885513
http://dx.doi.org/10.3390/ma14237361
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author Kočí, Václav
Kočí, Jan
Fořt, Jan
Fiala, Lukáš
Šál, Jiří
Hager, Izabela
Černý, Robert
author_facet Kočí, Václav
Kočí, Jan
Fořt, Jan
Fiala, Lukáš
Šál, Jiří
Hager, Izabela
Černý, Robert
author_sort Kočí, Václav
collection PubMed
description Production of concrete is connected to extensive energy demands, greenhouse gases production or primary sources depletion. Reflecting current economical, social, or environmental trends, there is strong pressure on mitigation these requirements and impacts. The exploitation of secondary- or waste materials in production processes has therefore a great potential which is not related solely to binders but also to fillers. In this light, this paper aims at thorough investigations of concrete mixtures with crushed concrete pavements as partial or full replacement of natural coarse aggregates. The research combines experimental techniques to quantify the influence of the substitution on basic physical, mechanical, and heat/moisture transport/storage parameters. The experimental data obtained are further exploited as input data for computational prediction of coupled heat and moisture transport to assess the influence of the aggregates substitution on hygrothermal performance of the built-in concretes. In the last step, the environmental impacts are assessed. Since the changes in the hygrothermal performance were found to be insignificant (i), the compressive strength were improved by up to 25% (ii) and most of the environmental impact indicators were decreased (iii) at the same time, the findings of the research presented predeterminate such a reuse strategy to wider application and use.
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spelling pubmed-86584452021-12-10 Utilization of Crushed Pavement Blocks in Concrete: Assessment of Functional Properties and Environmental Impacts Kočí, Václav Kočí, Jan Fořt, Jan Fiala, Lukáš Šál, Jiří Hager, Izabela Černý, Robert Materials (Basel) Article Production of concrete is connected to extensive energy demands, greenhouse gases production or primary sources depletion. Reflecting current economical, social, or environmental trends, there is strong pressure on mitigation these requirements and impacts. The exploitation of secondary- or waste materials in production processes has therefore a great potential which is not related solely to binders but also to fillers. In this light, this paper aims at thorough investigations of concrete mixtures with crushed concrete pavements as partial or full replacement of natural coarse aggregates. The research combines experimental techniques to quantify the influence of the substitution on basic physical, mechanical, and heat/moisture transport/storage parameters. The experimental data obtained are further exploited as input data for computational prediction of coupled heat and moisture transport to assess the influence of the aggregates substitution on hygrothermal performance of the built-in concretes. In the last step, the environmental impacts are assessed. Since the changes in the hygrothermal performance were found to be insignificant (i), the compressive strength were improved by up to 25% (ii) and most of the environmental impact indicators were decreased (iii) at the same time, the findings of the research presented predeterminate such a reuse strategy to wider application and use. MDPI 2021-11-30 /pmc/articles/PMC8658445/ /pubmed/34885513 http://dx.doi.org/10.3390/ma14237361 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
Kočí, Václav
Kočí, Jan
Fořt, Jan
Fiala, Lukáš
Šál, Jiří
Hager, Izabela
Černý, Robert
Utilization of Crushed Pavement Blocks in Concrete: Assessment of Functional Properties and Environmental Impacts
title Utilization of Crushed Pavement Blocks in Concrete: Assessment of Functional Properties and Environmental Impacts
title_full Utilization of Crushed Pavement Blocks in Concrete: Assessment of Functional Properties and Environmental Impacts
title_fullStr Utilization of Crushed Pavement Blocks in Concrete: Assessment of Functional Properties and Environmental Impacts
title_full_unstemmed Utilization of Crushed Pavement Blocks in Concrete: Assessment of Functional Properties and Environmental Impacts
title_short Utilization of Crushed Pavement Blocks in Concrete: Assessment of Functional Properties and Environmental Impacts
title_sort utilization of crushed pavement blocks in concrete: assessment of functional properties and environmental impacts
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658445/
https://www.ncbi.nlm.nih.gov/pubmed/34885513
http://dx.doi.org/10.3390/ma14237361
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