Durability and Microstructure Analysis of Loess-Based Composite Coal Gangue Porous Vegetation Concrete
In order to improve the durability of loess-based composite coal gangue porous planting concrete (LCPC), the effects of fly ash and slag powder content on the durability and microstructure of LCPC were studied. In this paper, fly ash and slag powder were mixed into LCPC, and freeze-thaw cycle and dr...
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MDPI AG
2025-07-01
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| author | Manman Qiu Wuyu Zhang Shuaihua Ye Xiaohui Li Jingbang Li |
| author_facet | Manman Qiu Wuyu Zhang Shuaihua Ye Xiaohui Li Jingbang Li |
| author_sort | Manman Qiu |
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| description | In order to improve the durability of loess-based composite coal gangue porous planting concrete (LCPC), the effects of fly ash and slag powder content on the durability and microstructure of LCPC were studied. In this paper, fly ash and slag powder were mixed into LCPC, and freeze-thaw cycle and dry-wet cycle tests were carried out. The compressive strength, dynamic elastic modulus, and mass change were used as evaluation indices to determine the optimal mix ratio for LCPC durability. Scanning electron microscopy (SEM) was performed, and the experimental design was carried out with the water–cement ratio, fly ash, and slag powder content as variables. The microstructure characteristics of LCPC were analyzed. The results show that the maximum number of freeze-thaw cycles can reach 35 times and the maximum number of dry-wet cycles can reach 50 when 5% fly ash and 20% slag powder are used. With an increase in the water-cement ratio, the skeleton of the loess gradually became complete, and its structure became more compact. In the micro-morphology diagram, the mixed fly ash and slag powder particles are not obvious, but with an increase in dosage, the size of the cracks and pores gradually decreases. The incorporation of fly ash and slag powder can play a positive role in the durability of LCPC and improvement of its microstructure. The results of this study are crucial for improving the application performance of ecological restoration, soil improvement, and long-term stability of structures, and can provide a scientific basis for the sustainable development of environmentally friendly building materials. |
| format | Article |
| id | doaj-art-5b6caebb4de64570b8fbb38b2376c1e7 |
| institution | DOAJ |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-07-01 |
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| spelling | doaj-art-5b6caebb4de64570b8fbb38b2376c1e72025-08-20T02:45:45ZengMDPI AGBuildings2075-53092025-07-011514253110.3390/buildings15142531Durability and Microstructure Analysis of Loess-Based Composite Coal Gangue Porous Vegetation ConcreteManman Qiu0Wuyu Zhang1Shuaihua Ye2Xiaohui Li3Jingbang Li4School of Civil Engineering and Water Resources, Qinghai University, Xining 810016, ChinaSchool of Civil Engineering and Water Resources, Qinghai University, Xining 810016, ChinaSchool of Civil Engineering and Water Resources, Qinghai University, Xining 810016, ChinaSchool of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, ChinaSchool of Civil Engineering, Lanzhou Institute of Technology, Lanzhou 730050, ChinaIn order to improve the durability of loess-based composite coal gangue porous planting concrete (LCPC), the effects of fly ash and slag powder content on the durability and microstructure of LCPC were studied. In this paper, fly ash and slag powder were mixed into LCPC, and freeze-thaw cycle and dry-wet cycle tests were carried out. The compressive strength, dynamic elastic modulus, and mass change were used as evaluation indices to determine the optimal mix ratio for LCPC durability. Scanning electron microscopy (SEM) was performed, and the experimental design was carried out with the water–cement ratio, fly ash, and slag powder content as variables. The microstructure characteristics of LCPC were analyzed. The results show that the maximum number of freeze-thaw cycles can reach 35 times and the maximum number of dry-wet cycles can reach 50 when 5% fly ash and 20% slag powder are used. With an increase in the water-cement ratio, the skeleton of the loess gradually became complete, and its structure became more compact. In the micro-morphology diagram, the mixed fly ash and slag powder particles are not obvious, but with an increase in dosage, the size of the cracks and pores gradually decreases. The incorporation of fly ash and slag powder can play a positive role in the durability of LCPC and improvement of its microstructure. The results of this study are crucial for improving the application performance of ecological restoration, soil improvement, and long-term stability of structures, and can provide a scientific basis for the sustainable development of environmentally friendly building materials.https://www.mdpi.com/2075-5309/15/14/2531loess-based concretecoal gangue concreteporous planting concreteconcrete durabilityconcrete microstructure |
| spellingShingle | Manman Qiu Wuyu Zhang Shuaihua Ye Xiaohui Li Jingbang Li Durability and Microstructure Analysis of Loess-Based Composite Coal Gangue Porous Vegetation Concrete Buildings loess-based concrete coal gangue concrete porous planting concrete concrete durability concrete microstructure |
| title | Durability and Microstructure Analysis of Loess-Based Composite Coal Gangue Porous Vegetation Concrete |
| title_full | Durability and Microstructure Analysis of Loess-Based Composite Coal Gangue Porous Vegetation Concrete |
| title_fullStr | Durability and Microstructure Analysis of Loess-Based Composite Coal Gangue Porous Vegetation Concrete |
| title_full_unstemmed | Durability and Microstructure Analysis of Loess-Based Composite Coal Gangue Porous Vegetation Concrete |
| title_short | Durability and Microstructure Analysis of Loess-Based Composite Coal Gangue Porous Vegetation Concrete |
| title_sort | durability and microstructure analysis of loess based composite coal gangue porous vegetation concrete |
| topic | loess-based concrete coal gangue concrete porous planting concrete concrete durability concrete microstructure |
| url | https://www.mdpi.com/2075-5309/15/14/2531 |
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