Durability of Marine Concretes with Nanoparticles under Combined Action of Bending Load and Salt Spray Erosion
The coupling effect of bending load and salt spray erosion during the service of a sea-crossing bridge accelerates the deterioration and durability of concrete and dramatically reduces the load-carrying capacity of the bridge. The effects of nanoparticles on the durability of marine concrete exposed...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2022/1968770 |
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| author | Zhang Maohua Lv Zhengyi Cui Jiyin Tian Zenong Li Zhiyi |
| author_facet | Zhang Maohua Lv Zhengyi Cui Jiyin Tian Zenong Li Zhiyi |
| author_sort | Zhang Maohua |
| collection | DOAJ |
| description | The coupling effect of bending load and salt spray erosion during the service of a sea-crossing bridge accelerates the deterioration and durability of concrete and dramatically reduces the load-carrying capacity of the bridge. The effects of nanoparticles on the durability of marine concrete exposed to bending loads and salt spray erosion were studied. In this paper, nano-SiO2 and nano-Fe2O3 were mixed into plain concrete. Free chloride ions (Cl−) were titrated at different concrete depths using a four-point loading device and a self-developed salt spray erosion test chamber. Test results showed that chloride ion levels in the tensile and compressive zones for both nanoconcretes were lower than plain concrete at the same timepoint. The optimal mixtures of the two nanoparticles were 2% and 1%, and the improvement of nano-SiO2 was more significant than nano-Fe2O3. Due to the special properties of nanomaterials, they effectively improved the microstructure of concrete and the composition of cement hydration products. This allowed concrete to become more compact, reduced crack generation, increased the difficulty of Cl− migration inside the concrete, and improved the overall durability of marine concrete upon exposure to bending loads and salt spray erosion. |
| format | Article |
| id | doaj-art-6d520a173b42478a98e04b1517678429 |
| institution | Kabale University |
| issn | 1687-8442 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-6d520a173b42478a98e04b15176784292025-02-03T06:11:49ZengWileyAdvances in Materials Science and Engineering1687-84422022-01-01202210.1155/2022/1968770Durability of Marine Concretes with Nanoparticles under Combined Action of Bending Load and Salt Spray ErosionZhang Maohua0Lv Zhengyi1Cui Jiyin2Tian Zenong3Li Zhiyi4School of Civil EngineeringSchool of Civil EngineeringSchool of Civil EngineeringSchool of Civil EngineeringSchool of Civil EngineeringThe coupling effect of bending load and salt spray erosion during the service of a sea-crossing bridge accelerates the deterioration and durability of concrete and dramatically reduces the load-carrying capacity of the bridge. The effects of nanoparticles on the durability of marine concrete exposed to bending loads and salt spray erosion were studied. In this paper, nano-SiO2 and nano-Fe2O3 were mixed into plain concrete. Free chloride ions (Cl−) were titrated at different concrete depths using a four-point loading device and a self-developed salt spray erosion test chamber. Test results showed that chloride ion levels in the tensile and compressive zones for both nanoconcretes were lower than plain concrete at the same timepoint. The optimal mixtures of the two nanoparticles were 2% and 1%, and the improvement of nano-SiO2 was more significant than nano-Fe2O3. Due to the special properties of nanomaterials, they effectively improved the microstructure of concrete and the composition of cement hydration products. This allowed concrete to become more compact, reduced crack generation, increased the difficulty of Cl− migration inside the concrete, and improved the overall durability of marine concrete upon exposure to bending loads and salt spray erosion.http://dx.doi.org/10.1155/2022/1968770 |
| spellingShingle | Zhang Maohua Lv Zhengyi Cui Jiyin Tian Zenong Li Zhiyi Durability of Marine Concretes with Nanoparticles under Combined Action of Bending Load and Salt Spray Erosion Advances in Materials Science and Engineering |
| title | Durability of Marine Concretes with Nanoparticles under Combined Action of Bending Load and Salt Spray Erosion |
| title_full | Durability of Marine Concretes with Nanoparticles under Combined Action of Bending Load and Salt Spray Erosion |
| title_fullStr | Durability of Marine Concretes with Nanoparticles under Combined Action of Bending Load and Salt Spray Erosion |
| title_full_unstemmed | Durability of Marine Concretes with Nanoparticles under Combined Action of Bending Load and Salt Spray Erosion |
| title_short | Durability of Marine Concretes with Nanoparticles under Combined Action of Bending Load and Salt Spray Erosion |
| title_sort | durability of marine concretes with nanoparticles under combined action of bending load and salt spray erosion |
| url | http://dx.doi.org/10.1155/2022/1968770 |
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