Rheological and Flexural Strength Characteristics of Cement Mixtures through the Synergistic Effects of Graphene Oxide and PVA Fibers
This study investigates the synergistic effects of incorporating graphene oxide (GO) and polyvinyl alcohol (PVA) fibers into cement paste mixtures, aiming to modify their rheological properties and flexural behaviors with resistance to crack formation. The relationship between static yield stress an...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-02-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/16/4/482 |
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| author | Byoung Hooi Cho Dong Wook Choi Mi Hwan Park |
| author_facet | Byoung Hooi Cho Dong Wook Choi Mi Hwan Park |
| author_sort | Byoung Hooi Cho |
| collection | DOAJ |
| description | This study investigates the synergistic effects of incorporating graphene oxide (GO) and polyvinyl alcohol (PVA) fibers into cement paste mixtures, aiming to modify their rheological properties and flexural behaviors with resistance to crack formation. The relationship between static yield stress and critical shear strain was examined in ten cement paste mixtures with varying concentrations of 6 mm and 12 mm PVA fibers and 0.05% GO. Additionally, viscosity analyses were performed. For the specimens fabricated from these mixtures, flexural strength tests were conducted using the Digital Image Correlation (DIC) technique for precise strain analysis under load history. The results indicated a significant increase in static yield stress, viscosity, and critical shear strain due to the combined addition of GO and PVA fibers, more so than when added individually. Notably, in PVA fiber-reinforced cement mixtures, the integration of GO increased the crack initiation load by up to 23% and enhanced pre-crack strain by 30 to 50%, demonstrating a notable delay in crack initiation and a reduction in crack propagation. Microstructural analyses using Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS) revealed a concentrated presence of GO around and on the PVA fibers. This promotes increased C-S-H gel formation, resulting in a denser microstructure. Additionally, GO effectively interacts with PVA fibers, enhancing the adherence of hydration products at their interface. |
| first_indexed | 2024-03-07T22:16:33Z |
| format | Article |
| id | doaj.art-0c43272dfc914d9396c027f92456da49 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-07T22:16:33Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-0c43272dfc914d9396c027f92456da492024-02-23T15:32:13ZengMDPI AGPolymers2073-43602024-02-0116448210.3390/polym16040482Rheological and Flexural Strength Characteristics of Cement Mixtures through the Synergistic Effects of Graphene Oxide and PVA FibersByoung Hooi Cho0Dong Wook Choi1Mi Hwan Park2Department of Civil Engineering, Sangmyung University, 31 Sangmyeongdae-gil, Dongnam-gu, Cheonan-si 31066, Republic of KoreaDepartment of Civil Engineering, Sangmyung University, 31 Sangmyeongdae-gil, Dongnam-gu, Cheonan-si 31066, Republic of KoreaDepartment of Civil Engineering, Sangmyung University, 31 Sangmyeongdae-gil, Dongnam-gu, Cheonan-si 31066, Republic of KoreaThis study investigates the synergistic effects of incorporating graphene oxide (GO) and polyvinyl alcohol (PVA) fibers into cement paste mixtures, aiming to modify their rheological properties and flexural behaviors with resistance to crack formation. The relationship between static yield stress and critical shear strain was examined in ten cement paste mixtures with varying concentrations of 6 mm and 12 mm PVA fibers and 0.05% GO. Additionally, viscosity analyses were performed. For the specimens fabricated from these mixtures, flexural strength tests were conducted using the Digital Image Correlation (DIC) technique for precise strain analysis under load history. The results indicated a significant increase in static yield stress, viscosity, and critical shear strain due to the combined addition of GO and PVA fibers, more so than when added individually. Notably, in PVA fiber-reinforced cement mixtures, the integration of GO increased the crack initiation load by up to 23% and enhanced pre-crack strain by 30 to 50%, demonstrating a notable delay in crack initiation and a reduction in crack propagation. Microstructural analyses using Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS) revealed a concentrated presence of GO around and on the PVA fibers. This promotes increased C-S-H gel formation, resulting in a denser microstructure. Additionally, GO effectively interacts with PVA fibers, enhancing the adherence of hydration products at their interface.https://www.mdpi.com/2073-4360/16/4/482graphene oxide (GO)polyvinyl alcohol (PVA) fibercement pasterheological propertiesflexural behaviordigital image correlation (DIC) |
| spellingShingle | Byoung Hooi Cho Dong Wook Choi Mi Hwan Park Rheological and Flexural Strength Characteristics of Cement Mixtures through the Synergistic Effects of Graphene Oxide and PVA Fibers Polymers graphene oxide (GO) polyvinyl alcohol (PVA) fiber cement paste rheological properties flexural behavior digital image correlation (DIC) |
| title | Rheological and Flexural Strength Characteristics of Cement Mixtures through the Synergistic Effects of Graphene Oxide and PVA Fibers |
| title_full | Rheological and Flexural Strength Characteristics of Cement Mixtures through the Synergistic Effects of Graphene Oxide and PVA Fibers |
| title_fullStr | Rheological and Flexural Strength Characteristics of Cement Mixtures through the Synergistic Effects of Graphene Oxide and PVA Fibers |
| title_full_unstemmed | Rheological and Flexural Strength Characteristics of Cement Mixtures through the Synergistic Effects of Graphene Oxide and PVA Fibers |
| title_short | Rheological and Flexural Strength Characteristics of Cement Mixtures through the Synergistic Effects of Graphene Oxide and PVA Fibers |
| title_sort | rheological and flexural strength characteristics of cement mixtures through the synergistic effects of graphene oxide and pva fibers |
| topic | graphene oxide (GO) polyvinyl alcohol (PVA) fiber cement paste rheological properties flexural behavior digital image correlation (DIC) |
| url | https://www.mdpi.com/2073-4360/16/4/482 |
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