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Investigation of the Effect of Graphene Oxide on the Properties and Microstructure of Clay-Cement Composite Grouting Materials

Reductions in bleeding rates and bulk shrinkage of grouting repair materials comprise the key to solving the leakage of earth–rock dams. In this paper, an anti-seepage grouting material for earth–rock dam was developed by introducing mineral admixtures and graphene oxide (GO) nano sheets into low-co...

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Autores principales: Ling, Xianzhang, Guo, Xiaoyu, Zhong, Jing, Ma, Jinji, Tang, Liang, Xing, Dongliang, Su, Jianguang, Cong, Shengyi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8910877/
https://www.ncbi.nlm.nih.gov/pubmed/35268854
http://dx.doi.org/10.3390/ma15051623
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author Ling, Xianzhang
Guo, Xiaoyu
Zhong, Jing
Ma, Jinji
Tang, Liang
Xing, Dongliang
Su, Jianguang
Cong, Shengyi
author_facet Ling, Xianzhang
Guo, Xiaoyu
Zhong, Jing
Ma, Jinji
Tang, Liang
Xing, Dongliang
Su, Jianguang
Cong, Shengyi
author_sort Ling, Xianzhang
collection PubMed
description Reductions in bleeding rates and bulk shrinkage of grouting repair materials comprise the key to solving the leakage of earth–rock dams. In this paper, an anti-seepage grouting material for earth–rock dam was developed by introducing mineral admixtures and graphene oxide (GO) nano sheets into low-cost clay–cement grouting materials and by adding polycarboxylate superplasticizers (PCs) to improve slurry viscosity. The experimental results show that the shear stress and viscosity of the slurry increase with the increase in GO concentration, and the slurry has a certain thixotropy. GO can provide a platform to promote the formation of hydration products and fill the pores of clay particles due to its high specific surface area and low volume; in this paper, the microstructure of clay–cement–graphene oxide (CCGO) grouting materials were improved. Therefore, the bleeding rate, bulk shrinkage rate, setting time and unconfined compressive strength (UCS) of the sample were macroscopically improved. In particular, the bleeding rate and bulk shrinkage rate were shown to be 0% when the content of GO reached 1.08 g/kg. Thus, the grouting anti-seepage and reinforcement performance of CCGO grouting materials were improved.
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spelling pubmed-89108772022-03-11 Investigation of the Effect of Graphene Oxide on the Properties and Microstructure of Clay-Cement Composite Grouting Materials Ling, Xianzhang Guo, Xiaoyu Zhong, Jing Ma, Jinji Tang, Liang Xing, Dongliang Su, Jianguang Cong, Shengyi Materials (Basel) Article Reductions in bleeding rates and bulk shrinkage of grouting repair materials comprise the key to solving the leakage of earth–rock dams. In this paper, an anti-seepage grouting material for earth–rock dam was developed by introducing mineral admixtures and graphene oxide (GO) nano sheets into low-cost clay–cement grouting materials and by adding polycarboxylate superplasticizers (PCs) to improve slurry viscosity. The experimental results show that the shear stress and viscosity of the slurry increase with the increase in GO concentration, and the slurry has a certain thixotropy. GO can provide a platform to promote the formation of hydration products and fill the pores of clay particles due to its high specific surface area and low volume; in this paper, the microstructure of clay–cement–graphene oxide (CCGO) grouting materials were improved. Therefore, the bleeding rate, bulk shrinkage rate, setting time and unconfined compressive strength (UCS) of the sample were macroscopically improved. In particular, the bleeding rate and bulk shrinkage rate were shown to be 0% when the content of GO reached 1.08 g/kg. Thus, the grouting anti-seepage and reinforcement performance of CCGO grouting materials were improved. MDPI 2022-02-22 /pmc/articles/PMC8910877/ /pubmed/35268854 http://dx.doi.org/10.3390/ma15051623 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
Ling, Xianzhang
Guo, Xiaoyu
Zhong, Jing
Ma, Jinji
Tang, Liang
Xing, Dongliang
Su, Jianguang
Cong, Shengyi
Investigation of the Effect of Graphene Oxide on the Properties and Microstructure of Clay-Cement Composite Grouting Materials
title Investigation of the Effect of Graphene Oxide on the Properties and Microstructure of Clay-Cement Composite Grouting Materials
title_full Investigation of the Effect of Graphene Oxide on the Properties and Microstructure of Clay-Cement Composite Grouting Materials
title_fullStr Investigation of the Effect of Graphene Oxide on the Properties and Microstructure of Clay-Cement Composite Grouting Materials
title_full_unstemmed Investigation of the Effect of Graphene Oxide on the Properties and Microstructure of Clay-Cement Composite Grouting Materials
title_short Investigation of the Effect of Graphene Oxide on the Properties and Microstructure of Clay-Cement Composite Grouting Materials
title_sort investigation of the effect of graphene oxide on the properties and microstructure of clay-cement composite grouting materials
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8910877/
https://www.ncbi.nlm.nih.gov/pubmed/35268854
http://dx.doi.org/10.3390/ma15051623
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