Mechanical Properties and Microstructure of Polyvinyl Alcohol (PVA) Modified Cement Mortar
The mechanical properties of cement mortars with 0~2.0% (by mass) polyvinyl alcohol (PVA) were experimentally studied, and the effects of PVA incorporation on the hydration products and microstructure of the cement mortar were determined with differential scanning calorimetry (DSC), Fourier transfor...
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| Format: | Article |
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MDPI AG
2019-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/11/2178 |
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| author | Jie Fan Gengying Li Sijie Deng Zhongkun Wang |
| author_facet | Jie Fan Gengying Li Sijie Deng Zhongkun Wang |
| author_sort | Jie Fan |
| collection | DOAJ |
| description | The mechanical properties of cement mortars with 0~2.0% (by mass) polyvinyl alcohol (PVA) were experimentally studied, and the effects of PVA incorporation on the hydration products and microstructure of the cement mortar were determined with differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The results show that the rational content of PVA formed evenly dispersed network-like thin films within the cement matrix, and these network-like films can bridge cracks in the cement matrix and improve the mechanical properties of the cement mortar. Over- incorporation of PVA may result in the formation of large piece polymer films that coat the cement particles, delay the hydration of the cement mortar and adversely affect its performance. The mechanical properties of the cement mortar show a significant increase and then decrease with a change in the PVA incorporation. When the PVA content was 0.6% and 1.0%, the mortar had the best compressive and flexural strengths, respectively. The compressive strength of the cement mortar increased by 12.15% for a PVA content of 0.6%, and the flexural strength of the cement mortar increased by 24.83% for a PVA content of 1.0%. |
| first_indexed | 2024-12-22T15:00:43Z |
| format | Article |
| id | doaj.art-d6734e3d777948109232ad02d20025b7 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-22T15:00:43Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-d6734e3d777948109232ad02d20025b72022-12-21T18:22:07ZengMDPI AGApplied Sciences2076-34172019-05-01911217810.3390/app9112178app9112178Mechanical Properties and Microstructure of Polyvinyl Alcohol (PVA) Modified Cement MortarJie Fan0Gengying Li1Sijie Deng2Zhongkun Wang3School of Civil Engineering, Guizhou Institute of Technology, Guiyang 515063, ChinaCollege of Water Conservancy and Civil Engineering, South China Agricultural University, Guangzhou 510642, ChinaSchool of Civil Engineering, Guizhou Institute of Technology, Guiyang 515063, ChinaCollege of Water Conservancy and Civil Engineering, South China Agricultural University, Guangzhou 510642, ChinaThe mechanical properties of cement mortars with 0~2.0% (by mass) polyvinyl alcohol (PVA) were experimentally studied, and the effects of PVA incorporation on the hydration products and microstructure of the cement mortar were determined with differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The results show that the rational content of PVA formed evenly dispersed network-like thin films within the cement matrix, and these network-like films can bridge cracks in the cement matrix and improve the mechanical properties of the cement mortar. Over- incorporation of PVA may result in the formation of large piece polymer films that coat the cement particles, delay the hydration of the cement mortar and adversely affect its performance. The mechanical properties of the cement mortar show a significant increase and then decrease with a change in the PVA incorporation. When the PVA content was 0.6% and 1.0%, the mortar had the best compressive and flexural strengths, respectively. The compressive strength of the cement mortar increased by 12.15% for a PVA content of 0.6%, and the flexural strength of the cement mortar increased by 24.83% for a PVA content of 1.0%.https://www.mdpi.com/2076-3417/9/11/2178polyvinyl alcoholcement mortarmechanical propertiesmicrostructure |
| spellingShingle | Jie Fan Gengying Li Sijie Deng Zhongkun Wang Mechanical Properties and Microstructure of Polyvinyl Alcohol (PVA) Modified Cement Mortar Applied Sciences polyvinyl alcohol cement mortar mechanical properties microstructure |
| title | Mechanical Properties and Microstructure of Polyvinyl Alcohol (PVA) Modified Cement Mortar |
| title_full | Mechanical Properties and Microstructure of Polyvinyl Alcohol (PVA) Modified Cement Mortar |
| title_fullStr | Mechanical Properties and Microstructure of Polyvinyl Alcohol (PVA) Modified Cement Mortar |
| title_full_unstemmed | Mechanical Properties and Microstructure of Polyvinyl Alcohol (PVA) Modified Cement Mortar |
| title_short | Mechanical Properties and Microstructure of Polyvinyl Alcohol (PVA) Modified Cement Mortar |
| title_sort | mechanical properties and microstructure of polyvinyl alcohol pva modified cement mortar |
| topic | polyvinyl alcohol cement mortar mechanical properties microstructure |
| url | https://www.mdpi.com/2076-3417/9/11/2178 |
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