Mechanical Properties of Precast Recycled Concrete Thermal Insulation Panels with GFRP Connectors
To improve both the composite performance of precast thermal insulation wall panels and the environmental sustainability of the structure, this study employs recycled concrete, and introduces an innovative four-footstool Glass Fiber Reinforced Plastic (GFRP) connector to join the inner and outer pan...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-03-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/15/6/891 |
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| author | Xiuling Li Haodong Sun Tianxuan Zhang Tongxing Bu Haoming Yu Jiaxin Sun Hu Feng |
| author_facet | Xiuling Li Haodong Sun Tianxuan Zhang Tongxing Bu Haoming Yu Jiaxin Sun Hu Feng |
| author_sort | Xiuling Li |
| collection | DOAJ |
| description | To improve both the composite performance of precast thermal insulation wall panels and the environmental sustainability of the structure, this study employs recycled concrete, and introduces an innovative four-footstool Glass Fiber Reinforced Plastic (GFRP) connector to join the inner and outer panels of precast thermal insulation wall systems. The experimental program included pull-out, shear, and bending tests to compare the performance of wall panels equipped with traditional Thermomass MS connectors and the novel GFRP connectors, using both conventional and fully recycled concrete. The results indicate that, when paired with recycled concrete, the GFRP connectors exhibited a 14.8% higher pull-out bearing capacity than the traditional connectors. Additionally, shear tests demonstrated that the GFRP connectors offered a 20.6% improvement in shear resistance compared to the Thermomass MS connectors. The bending strength of panels with GFRP connectors also showed an enhancement, with a 16.5% increase in flexural strength relative to those using traditional connectors. Notably, the GFRP connectors contributed to a more uniform crack distribution under loading, thereby improving the overall structural integrity. A reduction factor γ for the GFRP four-footstool connector was proposed based on a fully composite model, and the analysis of the composite degree calculation showed that the recycled concrete sample using the new GFRP connector had the highest composite degree. |
| format | Article |
| id | doaj-art-a359caaff40841788c38c1d9eccffc6d |
| institution | Kabale University |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj-art-a359caaff40841788c38c1d9eccffc6d2025-08-20T03:43:26ZengMDPI AGBuildings2075-53092025-03-0115689110.3390/buildings15060891Mechanical Properties of Precast Recycled Concrete Thermal Insulation Panels with GFRP ConnectorsXiuling Li0Haodong Sun1Tianxuan Zhang2Tongxing Bu3Haoming Yu4Jiaxin Sun5Hu Feng6School of Civil Engineering, Shandong Jiaotong University, Jinan 250357, ChinaKey Laboratory of Building Structural Retrofitting and Underground Space Engineering, Ministry of Education, School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, ChinaKey Laboratory of Building Structural Retrofitting and Underground Space Engineering, Ministry of Education, School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, ChinaKey Laboratory of Building Structural Retrofitting and Underground Space Engineering, Ministry of Education, School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, ChinaKey Laboratory of Building Structural Retrofitting and Underground Space Engineering, Ministry of Education, School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, ChinaKey Laboratory of Building Structural Retrofitting and Underground Space Engineering, Ministry of Education, School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, ChinaSchool of Civil Engineering, Zhengzhou University, Zhengzhou 450001, ChinaTo improve both the composite performance of precast thermal insulation wall panels and the environmental sustainability of the structure, this study employs recycled concrete, and introduces an innovative four-footstool Glass Fiber Reinforced Plastic (GFRP) connector to join the inner and outer panels of precast thermal insulation wall systems. The experimental program included pull-out, shear, and bending tests to compare the performance of wall panels equipped with traditional Thermomass MS connectors and the novel GFRP connectors, using both conventional and fully recycled concrete. The results indicate that, when paired with recycled concrete, the GFRP connectors exhibited a 14.8% higher pull-out bearing capacity than the traditional connectors. Additionally, shear tests demonstrated that the GFRP connectors offered a 20.6% improvement in shear resistance compared to the Thermomass MS connectors. The bending strength of panels with GFRP connectors also showed an enhancement, with a 16.5% increase in flexural strength relative to those using traditional connectors. Notably, the GFRP connectors contributed to a more uniform crack distribution under loading, thereby improving the overall structural integrity. A reduction factor γ for the GFRP four-footstool connector was proposed based on a fully composite model, and the analysis of the composite degree calculation showed that the recycled concrete sample using the new GFRP connector had the highest composite degree.https://www.mdpi.com/2075-5309/15/6/891GFRP connectorsprecast structurerecycled concretemechanical performancethermal insulation wall panels |
| spellingShingle | Xiuling Li Haodong Sun Tianxuan Zhang Tongxing Bu Haoming Yu Jiaxin Sun Hu Feng Mechanical Properties of Precast Recycled Concrete Thermal Insulation Panels with GFRP Connectors Buildings GFRP connectors precast structure recycled concrete mechanical performance thermal insulation wall panels |
| title | Mechanical Properties of Precast Recycled Concrete Thermal Insulation Panels with GFRP Connectors |
| title_full | Mechanical Properties of Precast Recycled Concrete Thermal Insulation Panels with GFRP Connectors |
| title_fullStr | Mechanical Properties of Precast Recycled Concrete Thermal Insulation Panels with GFRP Connectors |
| title_full_unstemmed | Mechanical Properties of Precast Recycled Concrete Thermal Insulation Panels with GFRP Connectors |
| title_short | Mechanical Properties of Precast Recycled Concrete Thermal Insulation Panels with GFRP Connectors |
| title_sort | mechanical properties of precast recycled concrete thermal insulation panels with gfrp connectors |
| topic | GFRP connectors precast structure recycled concrete mechanical performance thermal insulation wall panels |
| url | https://www.mdpi.com/2075-5309/15/6/891 |
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