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Effects of Different Factors on the Performance of Recycled Aggregate Permeable Pavement Concrete

Urban construction has produced a large amount of construction waste which has caused huge environmental problems. The sponge city is the development direction of urban construction, and permeable pavement concrete is an important material for sponge city construction. To see the law influencing dif...

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Detalles Bibliográficos
Autores principales: Wu, Ruidong, Shi, Shuning, Shen, Yu, Hu, Chen, Luo, Mengfei, Gan, Zichen, Xiao, Bin, Wang, Zeyu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9267464/
https://www.ncbi.nlm.nih.gov/pubmed/35806691
http://dx.doi.org/10.3390/ma15134566
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author Wu, Ruidong
Shi, Shuning
Shen, Yu
Hu, Chen
Luo, Mengfei
Gan, Zichen
Xiao, Bin
Wang, Zeyu
author_facet Wu, Ruidong
Shi, Shuning
Shen, Yu
Hu, Chen
Luo, Mengfei
Gan, Zichen
Xiao, Bin
Wang, Zeyu
author_sort Wu, Ruidong
collection PubMed
description Urban construction has produced a large amount of construction waste which has caused huge environmental problems. The sponge city is the development direction of urban construction, and permeable pavement concrete is an important material for sponge city construction. To see the law influencing different factors on the performance of recycled aggregate permeable pavement concrete, different water binder ratios, recycled aggregate particle gradations, ordinary aggregate substitution rates, and fly ash and admixture contents are designed to prepare permeable concrete. The compressive strength, permeability coefficient, frost resistance, and pore structure of permeable concrete are tested. The results show that when the replacement rate of recycled aggregate is 50%, the 28-d strength of concrete with a 0.25 water binder ratio can reach 28.9 MPa, and the permeability coefficient is 13.26 mm/s. The addition of fly ash will reduce the compressive strength, and the permeability coefficient increases first and then decreases with the increase of the fly ash content. When the mass fraction of fly ash instead of cement is 12%, the 28-d strength is 94.8% of that of the cement group, and the permeability coefficient can reach 14.03 mm/s. A water-reducing agent can obviously improve the workability of permeable concrete; the best content of the water-reducing agent is 0.2% of the cement mass. A reasonable amount of fly ash and water-reducing agent can optimize the number of harmless holes and less harmful holes in the concrete to improve the frost resistance and strength after the freeze–thaw, and the frost resistance is F150. This study provides a theoretical basis and technical guarantee for the resource utilization of recycled aggregate in permeable pavement concrete.
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spelling pubmed-92674642022-07-09 Effects of Different Factors on the Performance of Recycled Aggregate Permeable Pavement Concrete Wu, Ruidong Shi, Shuning Shen, Yu Hu, Chen Luo, Mengfei Gan, Zichen Xiao, Bin Wang, Zeyu Materials (Basel) Article Urban construction has produced a large amount of construction waste which has caused huge environmental problems. The sponge city is the development direction of urban construction, and permeable pavement concrete is an important material for sponge city construction. To see the law influencing different factors on the performance of recycled aggregate permeable pavement concrete, different water binder ratios, recycled aggregate particle gradations, ordinary aggregate substitution rates, and fly ash and admixture contents are designed to prepare permeable concrete. The compressive strength, permeability coefficient, frost resistance, and pore structure of permeable concrete are tested. The results show that when the replacement rate of recycled aggregate is 50%, the 28-d strength of concrete with a 0.25 water binder ratio can reach 28.9 MPa, and the permeability coefficient is 13.26 mm/s. The addition of fly ash will reduce the compressive strength, and the permeability coefficient increases first and then decreases with the increase of the fly ash content. When the mass fraction of fly ash instead of cement is 12%, the 28-d strength is 94.8% of that of the cement group, and the permeability coefficient can reach 14.03 mm/s. A water-reducing agent can obviously improve the workability of permeable concrete; the best content of the water-reducing agent is 0.2% of the cement mass. A reasonable amount of fly ash and water-reducing agent can optimize the number of harmless holes and less harmful holes in the concrete to improve the frost resistance and strength after the freeze–thaw, and the frost resistance is F150. This study provides a theoretical basis and technical guarantee for the resource utilization of recycled aggregate in permeable pavement concrete. MDPI 2022-06-29 /pmc/articles/PMC9267464/ /pubmed/35806691 http://dx.doi.org/10.3390/ma15134566 Text en © 2022 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
Wu, Ruidong
Shi, Shuning
Shen, Yu
Hu, Chen
Luo, Mengfei
Gan, Zichen
Xiao, Bin
Wang, Zeyu
Effects of Different Factors on the Performance of Recycled Aggregate Permeable Pavement Concrete
title Effects of Different Factors on the Performance of Recycled Aggregate Permeable Pavement Concrete
title_full Effects of Different Factors on the Performance of Recycled Aggregate Permeable Pavement Concrete
title_fullStr Effects of Different Factors on the Performance of Recycled Aggregate Permeable Pavement Concrete
title_full_unstemmed Effects of Different Factors on the Performance of Recycled Aggregate Permeable Pavement Concrete
title_short Effects of Different Factors on the Performance of Recycled Aggregate Permeable Pavement Concrete
title_sort effects of different factors on the performance of recycled aggregate permeable pavement concrete
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9267464/
https://www.ncbi.nlm.nih.gov/pubmed/35806691
http://dx.doi.org/10.3390/ma15134566
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