Mechanical Properties of Nano-TiO 2 -Modified Concrete Under Freeze–Thaw Environment.
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| Title: | Mechanical Properties of Nano-TiO 2 -Modified Concrete Under Freeze–Thaw Environment. |
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| Authors: | Xu, Chao1 (AUTHOR) 600298@hsu.edu.cn, Deng, Lin1,2 (AUTHOR), Yang, Dingtao3 (AUTHOR) |
| Source: | Nanomaterials (2079-4991). Aug2025, Vol. 15 Issue 16, p1254. 15p. |
| Subjects: | Titanium dioxide, Concrete, Mechanical behavior of materials, Compressive strength, Thermal shock, Fracture toughness, Energy dissipation, Simulation methods & models |
| Abstract: | This study investigated the freeze–thaw resistance of ordinary and nano-TiO2-modified concrete (NTC) based on mass loss, ultrasonic velocity, compressive strength, and fracture toughness. The compressive behavior and internal damage evolution were further analyzed using particle flow code in two dimensions (PFC2D) simulations. The results show that, although neither material exhibited structural collapse after freeze–thaw cycling, visible surface damage was observed, particularly in ordinary concrete. After 100 cycles, NTC showed a 52.17% reduction in mass loss and a 37.31% increase in ultrasonic velocity compared to ordinary concrete. Compressive strength of ordinary concrete decreased by 24.28 MPa (from 41.53 MPa to 17.25 MPa), while that of NTC decreased by only 13.37 MPa, demonstrating that the incorporation of nano-TiO2 effectively improves the compressive performance of concrete under freeze–thaw conditions. Fracture toughness after 100 cycles decreased by 89.7% in ordinary concrete and 80.9% in NTC, suggesting that while nano-TiO2 mitigates damage, its effect on maintaining fracture load-carrying capacity remains limited. The PFC2D simulations were consistent with the experimental results, effectively capturing peak compressive behavior and validating the model's applicability for freeze–thaw degradation analysis. [ABSTRACT FROM AUTHOR] |
| Copyright of Nanomaterials (2079-4991) 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: 187612624 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Mechanical Properties of Nano-TiO 2 -Modified Concrete Under Freeze–Thaw Environment. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Xu%2C+Chao%22">Xu, Chao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> 600298@hsu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Deng%2C+Lin%22">Deng, Lin</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Dingtao%22">Yang, Dingtao</searchLink><relatesTo>3</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Aug2025, Vol. 15 Issue 16, p1254. 15p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Titanium+dioxide%22">Titanium dioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Concrete%22">Concrete</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Compressive+strength%22">Compressive strength</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+shock%22">Thermal shock</searchLink><br /><searchLink fieldCode="DE" term="%22Fracture+toughness%22">Fracture toughness</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+dissipation%22">Energy dissipation</searchLink><br /><searchLink fieldCode="DE" term="%22Simulation+methods+%26+models%22">Simulation methods & models</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This study investigated the freeze–thaw resistance of ordinary and nano-TiO2-modified concrete (NTC) based on mass loss, ultrasonic velocity, compressive strength, and fracture toughness. The compressive behavior and internal damage evolution were further analyzed using particle flow code in two dimensions (PFC2D) simulations. The results show that, although neither material exhibited structural collapse after freeze–thaw cycling, visible surface damage was observed, particularly in ordinary concrete. After 100 cycles, NTC showed a 52.17% reduction in mass loss and a 37.31% increase in ultrasonic velocity compared to ordinary concrete. Compressive strength of ordinary concrete decreased by 24.28 MPa (from 41.53 MPa to 17.25 MPa), while that of NTC decreased by only 13.37 MPa, demonstrating that the incorporation of nano-TiO2 effectively improves the compressive performance of concrete under freeze–thaw conditions. Fracture toughness after 100 cycles decreased by 89.7% in ordinary concrete and 80.9% in NTC, suggesting that while nano-TiO2 mitigates damage, its effect on maintaining fracture load-carrying capacity remains limited. The PFC2D simulations were consistent with the experimental results, effectively capturing peak compressive behavior and validating the model's applicability for freeze–thaw degradation analysis. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nanomaterials (2079-4991) 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/nano15161254 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 1254 Subjects: – SubjectFull: Titanium dioxide Type: general – SubjectFull: Concrete Type: general – SubjectFull: Mechanical behavior of materials Type: general – SubjectFull: Compressive strength Type: general – SubjectFull: Thermal shock Type: general – SubjectFull: Fracture toughness Type: general – SubjectFull: Energy dissipation Type: general – SubjectFull: Simulation methods & models Type: general Titles: – TitleFull: Mechanical Properties of Nano-TiO 2 -Modified Concrete Under Freeze–Thaw Environment. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Xu, Chao – PersonEntity: Name: NameFull: Deng, Lin – PersonEntity: Name: NameFull: Yang, Dingtao IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 08 Text: Aug2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 20794991 Numbering: – Type: volume Value: 15 – Type: issue Value: 16 Titles: – TitleFull: Nanomaterials (2079-4991) Type: main |
| ResultId | 1 |
