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Effect of Cellulose Nanofibrils on the Physical Properties and Frost Resistance of Pervious Concrete

Pervious concrete has good water permeability and, if used in construction, it can alleviate the heat island effect. However, its low strength and poor durability are major obstacles to its use. This study shows that nano-reinforced pervious concrete created by incorporating cellulose nanofibrils (C...

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Detalles Bibliográficos
Autores principales: Zhang, Xu, Lei, Chengbang, Li, Zhi, Zhang, Aiqin, Zhao, Wanfeng, Zhang, Wei, Xu, Jiarong, Guo, Panpan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9695371/
https://www.ncbi.nlm.nih.gov/pubmed/36431394
http://dx.doi.org/10.3390/ma15227906
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author Zhang, Xu
Lei, Chengbang
Li, Zhi
Zhang, Aiqin
Zhao, Wanfeng
Zhang, Wei
Xu, Jiarong
Guo, Panpan
author_facet Zhang, Xu
Lei, Chengbang
Li, Zhi
Zhang, Aiqin
Zhao, Wanfeng
Zhang, Wei
Xu, Jiarong
Guo, Panpan
author_sort Zhang, Xu
collection PubMed
description Pervious concrete has good water permeability and, if used in construction, it can alleviate the heat island effect. However, its low strength and poor durability are major obstacles to its use. This study shows that nano-reinforced pervious concrete created by incorporating cellulose nanofibrils (CNFs) can improve the physical properties and increase the durability of pervious concrete. CNFs were added to the concrete mix in proportions ranging from 0.05% to 0.2% by weight of binder. The additions were found to alter matrix rheology. The hydration kinetics of matrix with differing CNF contents were compared and analyzed. The experimental results show the addition of CNFs delayed peak heat flow and maximum cumulative heat. The 28 d compressive strength of pervious concrete increased by up to 26.5% and 28 d flexural strength by up to 25.8% with the addition of 0.05–0.2% CNFs. Addition of 0.1% and 0.2% CNFs increased water permeability. Addition of 0.05–0.15% CNFs decreased mass loss by 73.2–83.7% after 150 freeze–thaw cycles, which corresponded to an increase in frost resistance. Denser matrices and stronger interfacial transition zones were observed using scanning electron microscopy when 0.05–0.2% CNFs were added.
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spelling pubmed-96953712022-11-26 Effect of Cellulose Nanofibrils on the Physical Properties and Frost Resistance of Pervious Concrete Zhang, Xu Lei, Chengbang Li, Zhi Zhang, Aiqin Zhao, Wanfeng Zhang, Wei Xu, Jiarong Guo, Panpan Materials (Basel) Article Pervious concrete has good water permeability and, if used in construction, it can alleviate the heat island effect. However, its low strength and poor durability are major obstacles to its use. This study shows that nano-reinforced pervious concrete created by incorporating cellulose nanofibrils (CNFs) can improve the physical properties and increase the durability of pervious concrete. CNFs were added to the concrete mix in proportions ranging from 0.05% to 0.2% by weight of binder. The additions were found to alter matrix rheology. The hydration kinetics of matrix with differing CNF contents were compared and analyzed. The experimental results show the addition of CNFs delayed peak heat flow and maximum cumulative heat. The 28 d compressive strength of pervious concrete increased by up to 26.5% and 28 d flexural strength by up to 25.8% with the addition of 0.05–0.2% CNFs. Addition of 0.1% and 0.2% CNFs increased water permeability. Addition of 0.05–0.15% CNFs decreased mass loss by 73.2–83.7% after 150 freeze–thaw cycles, which corresponded to an increase in frost resistance. Denser matrices and stronger interfacial transition zones were observed using scanning electron microscopy when 0.05–0.2% CNFs were added. MDPI 2022-11-09 /pmc/articles/PMC9695371/ /pubmed/36431394 http://dx.doi.org/10.3390/ma15227906 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
Zhang, Xu
Lei, Chengbang
Li, Zhi
Zhang, Aiqin
Zhao, Wanfeng
Zhang, Wei
Xu, Jiarong
Guo, Panpan
Effect of Cellulose Nanofibrils on the Physical Properties and Frost Resistance of Pervious Concrete
title Effect of Cellulose Nanofibrils on the Physical Properties and Frost Resistance of Pervious Concrete
title_full Effect of Cellulose Nanofibrils on the Physical Properties and Frost Resistance of Pervious Concrete
title_fullStr Effect of Cellulose Nanofibrils on the Physical Properties and Frost Resistance of Pervious Concrete
title_full_unstemmed Effect of Cellulose Nanofibrils on the Physical Properties and Frost Resistance of Pervious Concrete
title_short Effect of Cellulose Nanofibrils on the Physical Properties and Frost Resistance of Pervious Concrete
title_sort effect of cellulose nanofibrils on the physical properties and frost resistance of pervious concrete
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9695371/
https://www.ncbi.nlm.nih.gov/pubmed/36431394
http://dx.doi.org/10.3390/ma15227906
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