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A platform for research: civil engineering, architecture and urbanism
A complete thermo-poromechanical model for freeze-thaw modification of recycled coarse aggregate considering deterioration of each component
https://orcid.org/0000-0002-1061-4968
https://orcid.org/0000-0002-3908-2395
Abstract Freeze-thaw modification is a novel method that improves recycled aggregates by utilizing the expansion of pore water during phase transitions. However, there is still a lack of theoretical analysis regarding each component in recycled aggregates during freeze-thaw. In this paper, we introduce the parameter of pore radius to transform the traditional 2D phase diagram into a 3D phase diagram of pore water. This transformation makes the phase transition conditions of pore water more clear to understand. It is then combined with the pore size distribution of each component in recycled aggregate to calculate the ice content and freezing pressure. To achieve a more intuitive evaluation of frost susceptibility, this paper establishes a frost vulnerability index (FVI). Based on the FVI curves of different rocks, their frost resistance is categorized into three levels. Finally, according to the FVI of recycled aggregates with diverse material properties, some recommendations are provided for the engineering application of freeze-thaw modification.
Highlights By introducing the pore radius, the 2D phase diagram of water is transformed into a 3D diagram. FVI has been established to assess the susceptibility of different materials to freeze-thaw damage. The commen natural rocks are classified into three levels based on their frost resistance. The necessity of thermo-drying is verified through analysis. Theoretical analysis is conducted on the saturation level required and during the vacuum saturation.
A complete thermo-poromechanical model for freeze-thaw modification of recycled coarse aggregate considering deterioration of each component
https://orcid.org/0000-0002-1061-4968
https://orcid.org/0000-0002-3908-2395
Abstract Freeze-thaw modification is a novel method that improves recycled aggregates by utilizing the expansion of pore water during phase transitions. However, there is still a lack of theoretical analysis regarding each component in recycled aggregates during freeze-thaw. In this paper, we introduce the parameter of pore radius to transform the traditional 2D phase diagram into a 3D phase diagram of pore water. This transformation makes the phase transition conditions of pore water more clear to understand. It is then combined with the pore size distribution of each component in recycled aggregate to calculate the ice content and freezing pressure. To achieve a more intuitive evaluation of frost susceptibility, this paper establishes a frost vulnerability index (FVI). Based on the FVI curves of different rocks, their frost resistance is categorized into three levels. Finally, according to the FVI of recycled aggregates with diverse material properties, some recommendations are provided for the engineering application of freeze-thaw modification.
Highlights By introducing the pore radius, the 2D phase diagram of water is transformed into a 3D diagram. FVI has been established to assess the susceptibility of different materials to freeze-thaw damage. The commen natural rocks are classified into three levels based on their frost resistance. The necessity of thermo-drying is verified through analysis. Theoretical analysis is conducted on the saturation level required and during the vacuum saturation.
A complete thermo-poromechanical model for freeze-thaw modification of recycled coarse aggregate considering deterioration of each component
https://orcid.org/0000-0002-1061-4968
https://orcid.org/0000-0002-3908-2395
Abstract Freeze-thaw modification is a novel method that improves recycled aggregates by utilizing the expansion of pore water during phase transitions. However, there is still a lack of theoretical analysis regarding each component in recycled aggregates during freeze-thaw. In this paper, we introduce the parameter of pore radius to transform the traditional 2D phase diagram into a 3D phase diagram of pore water. This transformation makes the phase transition conditions of pore water more clear to understand. It is then combined with the pore size distribution of each component in recycled aggregate to calculate the ice content and freezing pressure. To achieve a more intuitive evaluation of frost susceptibility, this paper establishes a frost vulnerability index (FVI). Based on the FVI curves of different rocks, their frost resistance is categorized into three levels. Finally, according to the FVI of recycled aggregates with diverse material properties, some recommendations are provided for the engineering application of freeze-thaw modification.
Highlights By introducing the pore radius, the 2D phase diagram of water is transformed into a 3D diagram. FVI has been established to assess the susceptibility of different materials to freeze-thaw damage. The commen natural rocks are classified into three levels based on their frost resistance. The necessity of thermo-drying is verified through analysis. Theoretical analysis is conducted on the saturation level required and during the vacuum saturation.
A complete thermo-poromechanical model for freeze-thaw modification of recycled coarse aggregate considering deterioration of each component
Xia, Peng (author) / Huang, Zhe (author) / Wang, Shiqi (author) / Mao, Jianghong (author) / Liu, Lin (author) / Zhao, Yuxi (author) / Gong, Fuyuan (author)
2024-02-26
Article (Journal)
Electronic Resource
English
| Taylor & Francis Verlag | 2023