Effects of Polyoxymethylene Fiber on Fresh and Hardened Properties of Seawater Sea-Sand Concrete
Seawater and sea sand are used in concrete to reduce the consumption of freshwater and river sand. To improve the mechanical properties and cracking resistance of concrete, polymer fiber is commonly used. In this study, polyoxymethylene (POM) fiber was innovatively applied to seawater sea-sand concr...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/22/4969 |
| _version_ | 1797464094292312064 |
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| author | Xuanyi Xue Fei Wang Jianmin Hua Neng Wang Lepeng Huang Zengshun Chen Yunhang Yao |
| author_facet | Xuanyi Xue Fei Wang Jianmin Hua Neng Wang Lepeng Huang Zengshun Chen Yunhang Yao |
| author_sort | Xuanyi Xue |
| collection | DOAJ |
| description | Seawater and sea sand are used in concrete to reduce the consumption of freshwater and river sand. To improve the mechanical properties and cracking resistance of concrete, polymer fiber is commonly used. In this study, polyoxymethylene (POM) fiber was innovatively applied to seawater sea-sand concrete (SWSSC), and the workability, early-age cracking behavior, and mechanical properties of SWSSC reinforced with POM fiber were investigated experimentally. A total of 6 kinds of SWSSC mixtures and 72 specimens were included. The test results indicated that with increases in fiber volume fractions (<i>ρ</i>), the workability of SWSSC decreased correspondingly. Compared with plain SWSSC, for SWSSC with <i>ρ</i> = 1%, the decreases in slump and expansibility were 110.6 and 91.9 mm, respectively. POM fiber had a significant enhancing effect on the early-age cracking resistance of SWSSC. Compared with those of plain SWSSC, the cracking indices <i>a<sub>c</sub></i>, <i>b<sub>c</sub></i>, and <i>c<sub>c</sub></i> of the POM-1 specimen decreased by 77.0%, 89.4%, and 97.6%, respectively. Cube and axial compressive tests, splitting tensile tests, and flexural tests were conducted to clarify the effects of POM fiber on the mechanical properties of SWSSC. Compared with plain SWSSC, SWSSC with POM fiber performed better in terms of mechanical properties. Predictive equations were proposed to quantify the effects of POM fiber on the mechanical properties of SWSSC. The failure performances of the SWSSC specimens were discussed and their complete stress–strain curve was analyzed. A stress–strain model for SWSSC was suggested. According to the model, the complete stress–strain curve of SWSSC with any POM fiber content could be determined. |
| first_indexed | 2024-03-09T18:02:59Z |
| format | Article |
| id | doaj.art-6abec9351e7d4388b5f421be348e28ce |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T18:02:59Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-6abec9351e7d4388b5f421be348e28ce2023-11-24T09:43:58ZengMDPI AGPolymers2073-43602022-11-011422496910.3390/polym14224969Effects of Polyoxymethylene Fiber on Fresh and Hardened Properties of Seawater Sea-Sand ConcreteXuanyi Xue0Fei Wang1Jianmin Hua2Neng Wang3Lepeng Huang4Zengshun Chen5Yunhang Yao6School of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Management Science and Real Estate, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSeawater and sea sand are used in concrete to reduce the consumption of freshwater and river sand. To improve the mechanical properties and cracking resistance of concrete, polymer fiber is commonly used. In this study, polyoxymethylene (POM) fiber was innovatively applied to seawater sea-sand concrete (SWSSC), and the workability, early-age cracking behavior, and mechanical properties of SWSSC reinforced with POM fiber were investigated experimentally. A total of 6 kinds of SWSSC mixtures and 72 specimens were included. The test results indicated that with increases in fiber volume fractions (<i>ρ</i>), the workability of SWSSC decreased correspondingly. Compared with plain SWSSC, for SWSSC with <i>ρ</i> = 1%, the decreases in slump and expansibility were 110.6 and 91.9 mm, respectively. POM fiber had a significant enhancing effect on the early-age cracking resistance of SWSSC. Compared with those of plain SWSSC, the cracking indices <i>a<sub>c</sub></i>, <i>b<sub>c</sub></i>, and <i>c<sub>c</sub></i> of the POM-1 specimen decreased by 77.0%, 89.4%, and 97.6%, respectively. Cube and axial compressive tests, splitting tensile tests, and flexural tests were conducted to clarify the effects of POM fiber on the mechanical properties of SWSSC. Compared with plain SWSSC, SWSSC with POM fiber performed better in terms of mechanical properties. Predictive equations were proposed to quantify the effects of POM fiber on the mechanical properties of SWSSC. The failure performances of the SWSSC specimens were discussed and their complete stress–strain curve was analyzed. A stress–strain model for SWSSC was suggested. According to the model, the complete stress–strain curve of SWSSC with any POM fiber content could be determined.https://www.mdpi.com/2073-4360/14/22/4969seawater sea-sand concretepolyoxymethylene (POM) fiberearly-age cracking performanceworkabilitymechanical property |
| spellingShingle | Xuanyi Xue Fei Wang Jianmin Hua Neng Wang Lepeng Huang Zengshun Chen Yunhang Yao Effects of Polyoxymethylene Fiber on Fresh and Hardened Properties of Seawater Sea-Sand Concrete Polymers seawater sea-sand concrete polyoxymethylene (POM) fiber early-age cracking performance workability mechanical property |
| title | Effects of Polyoxymethylene Fiber on Fresh and Hardened Properties of Seawater Sea-Sand Concrete |
| title_full | Effects of Polyoxymethylene Fiber on Fresh and Hardened Properties of Seawater Sea-Sand Concrete |
| title_fullStr | Effects of Polyoxymethylene Fiber on Fresh and Hardened Properties of Seawater Sea-Sand Concrete |
| title_full_unstemmed | Effects of Polyoxymethylene Fiber on Fresh and Hardened Properties of Seawater Sea-Sand Concrete |
| title_short | Effects of Polyoxymethylene Fiber on Fresh and Hardened Properties of Seawater Sea-Sand Concrete |
| title_sort | effects of polyoxymethylene fiber on fresh and hardened properties of seawater sea sand concrete |
| topic | seawater sea-sand concrete polyoxymethylene (POM) fiber early-age cracking performance workability mechanical property |
| url | https://www.mdpi.com/2073-4360/14/22/4969 |
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