Study on the Binding Behavior of Chloride Ion and Ettringite in Nano-Metakaolin Cement by Seawater Mixing and Curing Temperatures.
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| Title: | Study on the Binding Behavior of Chloride Ion and Ettringite in Nano-Metakaolin Cement by Seawater Mixing and Curing Temperatures. |
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| Authors: | Fang, Zhisheng1 (AUTHOR), Zhang, Shiyi1,2 (AUTHOR) zhangsy986@163.com, Qi, Wenjie1 (AUTHOR), Fan, Yingfang2 (AUTHOR), Shah, Surendra P.3,4 (AUTHOR), Zheng, Junjie5 (AUTHOR) |
| Source: | Materials (1996-1944). Aug2024, Vol. 17 Issue 16, p3943. 16p. |
| Subjects: | Chloride ions, Ettringite, Scanning electron microscopy, Cement mixing, X-ray diffraction |
| Abstract: | Mixing cement with seawater will cause the hydration process of cement to be different from that of ordinary cement, which will significantly affect cement's mechanical properties and durability. This article investigates the effects of chloride ion concentration, curing temperature, and nano-metakaolin content on the evolution process of Friedel's salts and ettringite (AFt) crystals in cement pastes. The study was conducted using X-ray diffraction (XRD), thermal analysis (TG), scanning electron microscopy (SEM), and mercury-intrusion porosimetry (MIP). The results show that chlorine salt can increase the production of Friedel's salt and ettringite, and the delayed AFt production increases by up to 27.95% after the addition of chlorine salt, which has an adverse effect on cement-based materials. Increasing the curing temperature and increasing the nano-metakaolin dosage increased the generation of Friedel's salt and decreased the delayed AFt generation, which resulted in a decrease in the length and diameter of the AFt crystals. After 28 days of high-temperature curing and the addition of nano-metakaolin, Friedel's salt production increased by 13.40% and 14.34%, respectively, and ettringite production decreased by 9.68% and 7.93%, respectively. Increasing the curing temperature and adding nano-metakaolin can reduce the adverse effect of delayed ettringite increases due to chloride ion binding. [ABSTRACT FROM AUTHOR] |
| Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 179350467 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Study on the Binding Behavior of Chloride Ion and Ettringite in Nano-Metakaolin Cement by Seawater Mixing and Curing Temperatures. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Fang%2C+Zhisheng%22">Fang, Zhisheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Shiyi%22">Zhang, Shiyi</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> zhangsy986@163.com</i><br /><searchLink fieldCode="AR" term="%22Qi%2C+Wenjie%22">Qi, Wenjie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fan%2C+Yingfang%22">Fan, Yingfang</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shah%2C+Surendra+P%2E%22">Shah, Surendra P.</searchLink><relatesTo>3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zheng%2C+Junjie%22">Zheng, Junjie</searchLink><relatesTo>5</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Aug2024, Vol. 17 Issue 16, p3943. 16p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Chloride+ions%22">Chloride ions</searchLink><br /><searchLink fieldCode="DE" term="%22Ettringite%22">Ettringite</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+electron+microscopy%22">Scanning electron microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Cement+mixing%22">Cement mixing</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Mixing cement with seawater will cause the hydration process of cement to be different from that of ordinary cement, which will significantly affect cement's mechanical properties and durability. This article investigates the effects of chloride ion concentration, curing temperature, and nano-metakaolin content on the evolution process of Friedel's salts and ettringite (AFt) crystals in cement pastes. The study was conducted using X-ray diffraction (XRD), thermal analysis (TG), scanning electron microscopy (SEM), and mercury-intrusion porosimetry (MIP). The results show that chlorine salt can increase the production of Friedel's salt and ettringite, and the delayed AFt production increases by up to 27.95% after the addition of chlorine salt, which has an adverse effect on cement-based materials. Increasing the curing temperature and increasing the nano-metakaolin dosage increased the generation of Friedel's salt and decreased the delayed AFt generation, which resulted in a decrease in the length and diameter of the AFt crystals. After 28 days of high-temperature curing and the addition of nano-metakaolin, Friedel's salt production increased by 13.40% and 14.34%, respectively, and ettringite production decreased by 9.68% and 7.93%, respectively. Increasing the curing temperature and adding nano-metakaolin can reduce the adverse effect of delayed ettringite increases due to chloride ion binding. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/ma17163943 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 16 StartPage: 3943 Subjects: – SubjectFull: Chloride ions Type: general – SubjectFull: Ettringite Type: general – SubjectFull: Scanning electron microscopy Type: general – SubjectFull: Cement mixing Type: general – SubjectFull: X-ray diffraction Type: general Titles: – TitleFull: Study on the Binding Behavior of Chloride Ion and Ettringite in Nano-Metakaolin Cement by Seawater Mixing and Curing Temperatures. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Fang, Zhisheng – PersonEntity: Name: NameFull: Zhang, Shiyi – PersonEntity: Name: NameFull: Qi, Wenjie – PersonEntity: Name: NameFull: Fan, Yingfang – PersonEntity: Name: NameFull: Shah, Surendra P. – PersonEntity: Name: NameFull: Zheng, Junjie IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 08 Text: Aug2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 19961944 Numbering: – Type: volume Value: 17 – Type: issue Value: 16 Titles: – TitleFull: Materials (1996-1944) Type: main |
| ResultId | 1 |
