The Effect of the Addition of Graphene Nanoplatelets on the Selected Properties of Cementitious Composites
The aim of the current study is to investigate the properties of graphene nanoplatelets-cementitious composites in a consistent sense. The influence of the addition of 2D graphene nanoplatelets (GNPs) on the workability, setting time, flowability, strengths and piezoresistive properties were studied...
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| Format: | Article |
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Frontiers Media S.A.
2021-07-01
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| Series: | Frontiers in Built Environment |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fbuil.2021.673346/full |
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| author | Zhi Ge Jin Qin Renjuan Sun Yanhua Guan Hongzhi Zhang Hongzhi Zhang Zheng Wang |
| author_facet | Zhi Ge Jin Qin Renjuan Sun Yanhua Guan Hongzhi Zhang Hongzhi Zhang Zheng Wang |
| author_sort | Zhi Ge |
| collection | DOAJ |
| description | The aim of the current study is to investigate the properties of graphene nanoplatelets-cementitious composites in a consistent sense. The influence of the addition of 2D graphene nanoplatelets (GNPs) on the workability, setting time, flowability, strengths and piezoresistive properties were studied. The dosage of the GNPs is 0 0.05, 0.1, 0.3, 0.5, 0.7, and 1.0 wt% of the binder material. PVP type surfactant was used to disperse GNPs. The experimental results showed that the addition of GNPs increases the water requirement for normal consistency and decreases the flowability. A small amount of GNPs (0.05 wt%) can facilitate the setting. When the dosage of GNPs is above 0.1 wt%, it leads to the delay of the setting time. In terms of the strengths, the addition of GNPs can considerably promote the flexural strength, while the compressive strength is slightly decreased until 28 days. A pre-treatment procedure consisting of drying specimens at 105°C for 1 day can be regarded as a proper way to enhance the piezoresistive properties of the GNPs-mortar. Piezoresistive properties under two different cyclical loading schemes were measured using the GNPs-mortar with 1 wt% GNPs. It has been shown that the average resistance change rate increases with the amplitude increasing and a reduction is observed for the sustained cyclical loading condition. In the end, the influence of the microcracks on the piezoresistive properties was investigated. This study will contribute to future developments of cementitious composites incorporating GNPs for a variety of applications. |
| first_indexed | 2024-12-16T23:17:54Z |
| format | Article |
| id | doaj.art-76690ecb2a334f71bf91b4d32d53177a |
| institution | Directory Open Access Journal |
| issn | 2297-3362 |
| language | English |
| last_indexed | 2024-12-16T23:17:54Z |
| publishDate | 2021-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Built Environment |
| spelling | doaj.art-76690ecb2a334f71bf91b4d32d53177a2022-12-21T22:12:14ZengFrontiers Media S.A.Frontiers in Built Environment2297-33622021-07-01710.3389/fbuil.2021.673346673346The Effect of the Addition of Graphene Nanoplatelets on the Selected Properties of Cementitious CompositesZhi Ge0Jin Qin1Renjuan Sun2Yanhua Guan3Hongzhi Zhang4Hongzhi Zhang5Zheng Wang6School of Qilu Transportation, Shandong University, Jinan, ChinaSchool of Qilu Transportation, Shandong University, Jinan, ChinaSchool of Qilu Transportation, Shandong University, Jinan, ChinaSchool of Qilu Transportation, Shandong University, Jinan, ChinaSchool of Qilu Transportation, Shandong University, Jinan, ChinaSuzhou Research Institute, Shandong University, Suzhou, ChinaShandong Hi-Speed Group, Jinan, ChinaThe aim of the current study is to investigate the properties of graphene nanoplatelets-cementitious composites in a consistent sense. The influence of the addition of 2D graphene nanoplatelets (GNPs) on the workability, setting time, flowability, strengths and piezoresistive properties were studied. The dosage of the GNPs is 0 0.05, 0.1, 0.3, 0.5, 0.7, and 1.0 wt% of the binder material. PVP type surfactant was used to disperse GNPs. The experimental results showed that the addition of GNPs increases the water requirement for normal consistency and decreases the flowability. A small amount of GNPs (0.05 wt%) can facilitate the setting. When the dosage of GNPs is above 0.1 wt%, it leads to the delay of the setting time. In terms of the strengths, the addition of GNPs can considerably promote the flexural strength, while the compressive strength is slightly decreased until 28 days. A pre-treatment procedure consisting of drying specimens at 105°C for 1 day can be regarded as a proper way to enhance the piezoresistive properties of the GNPs-mortar. Piezoresistive properties under two different cyclical loading schemes were measured using the GNPs-mortar with 1 wt% GNPs. It has been shown that the average resistance change rate increases with the amplitude increasing and a reduction is observed for the sustained cyclical loading condition. In the end, the influence of the microcracks on the piezoresistive properties was investigated. This study will contribute to future developments of cementitious composites incorporating GNPs for a variety of applications.https://www.frontiersin.org/articles/10.3389/fbuil.2021.673346/fullgraphene nanoplateletscement compositesfresh propertiesmechanical propertiespiezoresistive properties |
| spellingShingle | Zhi Ge Jin Qin Renjuan Sun Yanhua Guan Hongzhi Zhang Hongzhi Zhang Zheng Wang The Effect of the Addition of Graphene Nanoplatelets on the Selected Properties of Cementitious Composites Frontiers in Built Environment graphene nanoplatelets cement composites fresh properties mechanical properties piezoresistive properties |
| title | The Effect of the Addition of Graphene Nanoplatelets on the Selected Properties of Cementitious Composites |
| title_full | The Effect of the Addition of Graphene Nanoplatelets on the Selected Properties of Cementitious Composites |
| title_fullStr | The Effect of the Addition of Graphene Nanoplatelets on the Selected Properties of Cementitious Composites |
| title_full_unstemmed | The Effect of the Addition of Graphene Nanoplatelets on the Selected Properties of Cementitious Composites |
| title_short | The Effect of the Addition of Graphene Nanoplatelets on the Selected Properties of Cementitious Composites |
| title_sort | effect of the addition of graphene nanoplatelets on the selected properties of cementitious composites |
| topic | graphene nanoplatelets cement composites fresh properties mechanical properties piezoresistive properties |
| url | https://www.frontiersin.org/articles/10.3389/fbuil.2021.673346/full |
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