Effect of Graphene Oxide on the Mechanical Property and Microstructure of Clay-Cement Slurry
As a widely used material in underground engineering, clay-cement slurry grouting is characterized by poor initial anti-seepage and filtration capacity, low strength of the resulting stone body, and a tendency to brittle failure. In this study, a novel type of clay-cement slurry was developed by add...
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MDPI AG
2023-06-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/12/4294 |
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| author | Shujie Liu Jinze Sun Jiwei Zhang Zuodong Xie Zhijie Yu |
| author_facet | Shujie Liu Jinze Sun Jiwei Zhang Zuodong Xie Zhijie Yu |
| author_sort | Shujie Liu |
| collection | DOAJ |
| description | As a widely used material in underground engineering, clay-cement slurry grouting is characterized by poor initial anti-seepage and filtration capacity, low strength of the resulting stone body, and a tendency to brittle failure. In this study, a novel type of clay-cement slurry was developed by adding of graphene oxide (GO) as a modifier to ordinary clay-cement slurry. The rheological properties of the improved slurry were studied through laboratory tests, and the effects of varying amounts of GO on the slurry’s viscosity, stability, plastic strength, and stone body mechanical properties were analyzed. The results indicated that the viscosity of clay-cement slurry increases by a maximum of 163% with 0.05% GO, resulting in a decrease in the slurry’s fluidity. The stability and plastic strength of GO-modified clay-cement slurry were significantly enhanced, with the plastic strength increasing by a 5.62 time with 0.03% GO and a 7.11 time with 0.05% GO at the same curing time. The stone body of the slurry exhibited increased uniaxial compressive strength and shear strength, with maximum increases of 23.94% and 25.27% with 0.05% GO, respectively, indicating a significant optimization effect on the slurry’s durability. The micro-mechanism for the effect of GO on the properties of slurry was investigated using scanning electron microscopy (SEM) and a diffraction of X-rays (XRD) test. Moreover, a growth model of the stone body of GO-modified clay-cement slurry was proposed. The results showed that after the GO-modified clay-cement slurry was solidified, a clay-cement agglomerate space skeleton with GO monolayer as the core was formed inside the stone body, and with an increase in GO content from 0.03% to 0.05%, the number of clay particles increased. The clay particles filled the skeleton to form a slurry system architecture, which is the primary reason for the superior performance of GO-modified clay-cement slurry when compared with traditional clay-cement slurry. |
| first_indexed | 2024-03-11T02:12:31Z |
| format | Article |
| id | doaj.art-7a25645039ca4148b1dda7615a429a8c |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T02:12:31Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-7a25645039ca4148b1dda7615a429a8c2023-11-18T11:24:14ZengMDPI AGMaterials1996-19442023-06-011612429410.3390/ma16124294Effect of Graphene Oxide on the Mechanical Property and Microstructure of Clay-Cement SlurryShujie Liu0Jinze Sun1Jiwei Zhang2Zuodong Xie3Zhijie Yu4China Coal Research Institute, Beijing 100013, ChinaChina Coal Research Institute, Beijing 100013, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100085, ChinaChina Coal Research Institute, Beijing 100013, ChinaChina Coal Research Institute, Beijing 100013, ChinaAs a widely used material in underground engineering, clay-cement slurry grouting is characterized by poor initial anti-seepage and filtration capacity, low strength of the resulting stone body, and a tendency to brittle failure. In this study, a novel type of clay-cement slurry was developed by adding of graphene oxide (GO) as a modifier to ordinary clay-cement slurry. The rheological properties of the improved slurry were studied through laboratory tests, and the effects of varying amounts of GO on the slurry’s viscosity, stability, plastic strength, and stone body mechanical properties were analyzed. The results indicated that the viscosity of clay-cement slurry increases by a maximum of 163% with 0.05% GO, resulting in a decrease in the slurry’s fluidity. The stability and plastic strength of GO-modified clay-cement slurry were significantly enhanced, with the plastic strength increasing by a 5.62 time with 0.03% GO and a 7.11 time with 0.05% GO at the same curing time. The stone body of the slurry exhibited increased uniaxial compressive strength and shear strength, with maximum increases of 23.94% and 25.27% with 0.05% GO, respectively, indicating a significant optimization effect on the slurry’s durability. The micro-mechanism for the effect of GO on the properties of slurry was investigated using scanning electron microscopy (SEM) and a diffraction of X-rays (XRD) test. Moreover, a growth model of the stone body of GO-modified clay-cement slurry was proposed. The results showed that after the GO-modified clay-cement slurry was solidified, a clay-cement agglomerate space skeleton with GO monolayer as the core was formed inside the stone body, and with an increase in GO content from 0.03% to 0.05%, the number of clay particles increased. The clay particles filled the skeleton to form a slurry system architecture, which is the primary reason for the superior performance of GO-modified clay-cement slurry when compared with traditional clay-cement slurry.https://www.mdpi.com/1996-1944/16/12/4294clay-cement slurrygraphene oxidecementmicro structure |
| spellingShingle | Shujie Liu Jinze Sun Jiwei Zhang Zuodong Xie Zhijie Yu Effect of Graphene Oxide on the Mechanical Property and Microstructure of Clay-Cement Slurry Materials clay-cement slurry graphene oxide cement micro structure |
| title | Effect of Graphene Oxide on the Mechanical Property and Microstructure of Clay-Cement Slurry |
| title_full | Effect of Graphene Oxide on the Mechanical Property and Microstructure of Clay-Cement Slurry |
| title_fullStr | Effect of Graphene Oxide on the Mechanical Property and Microstructure of Clay-Cement Slurry |
| title_full_unstemmed | Effect of Graphene Oxide on the Mechanical Property and Microstructure of Clay-Cement Slurry |
| title_short | Effect of Graphene Oxide on the Mechanical Property and Microstructure of Clay-Cement Slurry |
| title_sort | effect of graphene oxide on the mechanical property and microstructure of clay cement slurry |
| topic | clay-cement slurry graphene oxide cement micro structure |
| url | https://www.mdpi.com/1996-1944/16/12/4294 |
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