Study on the Application and Deformation Characteristics of Construction Waste Recycled Materials in Highway Subgrade Engineering
It is difficult to meet environmental requirements via the coarse treatment methods of landfilling and open-air storage of construction waste. At the same time, the consumption of building materials in highway engineering is enormous. Using construction waste as a filling material for proposed roads...
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MDPI AG
2025-03-01
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| Online Access: | https://www.mdpi.com/2075-5309/15/5/835 |
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| author | Yuan Mei Hongping Lu Xueyan Wang Bingyu Zhou Ziyang Liu Lu Wang |
| author_facet | Yuan Mei Hongping Lu Xueyan Wang Bingyu Zhou Ziyang Liu Lu Wang |
| author_sort | Yuan Mei |
| collection | DOAJ |
| description | It is difficult to meet environmental requirements via the coarse treatment methods of landfilling and open-air storage of construction waste. At the same time, the consumption of building materials in highway engineering is enormous. Using construction waste as a filling material for proposed roads has become a research hotspot in recent years. This paper starts with basic performance tests of recycled construction waste materials, and then moves on to laboratory experiments conducted to obtain the road performance of the recycled materials, the testing of key indicators of post-construction filling quality of the roadbed, and analyses of the deformation pattern of roadbed filled with construction waste. Additionally, the ABAQUS finite element software was used to establish a numerical model for roadbed deformation and analyze the roadbed deformation under different compaction levels and vehicle load conditions. The experimental results show that the recycled material has a moisture content of 8.5%, water absorption of 11.73%, and an apparent density of 2.61 g/cm<sup>3</sup>, while the liquid limit of fine aggregates is 20% and the plasticity index is 5.4. Although the physical properties are slightly inferior to natural aggregates, its bearing ratio (25–55%) and low expansion characteristics meet the requirements for high-grade highway roadbed filling materials. The roadbed layer with a loose compaction of 250 mm, after eight passes of rolling, showed a settlement difference of less than 5 mm, with the loose compaction coefficient stabilizing between 1.15 and 1.20. Finite element simulations indicated that the total settlement of the roadbed stabilizes at 20–30 mm, and increasing the compaction level to 96% can reduce the settlement by 2–4%. Vehicle overload causes a positive correlation between the vertical displacement and shear stress in the base layer, suggesting the need to strengthen vehicle load control. The findings provide theoretical and technical support for the large-scale application of recycled construction waste materials in roadbed engineering. |
| format | Article |
| id | doaj-art-717f04c0f75c4792be00b3716e22da1f |
| institution | DOAJ |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj-art-717f04c0f75c4792be00b3716e22da1f2025-08-20T02:53:02ZengMDPI AGBuildings2075-53092025-03-0115583510.3390/buildings15050835Study on the Application and Deformation Characteristics of Construction Waste Recycled Materials in Highway Subgrade EngineeringYuan Mei0Hongping Lu1Xueyan Wang2Bingyu Zhou3Ziyang Liu4Lu Wang5School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaSchool of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaSchool of Urban Planning and Municipal Engineering, Xi’an Polytechnic University, Xi’an 710048, ChinaSchool of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaSchool of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaSchool of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaIt is difficult to meet environmental requirements via the coarse treatment methods of landfilling and open-air storage of construction waste. At the same time, the consumption of building materials in highway engineering is enormous. Using construction waste as a filling material for proposed roads has become a research hotspot in recent years. This paper starts with basic performance tests of recycled construction waste materials, and then moves on to laboratory experiments conducted to obtain the road performance of the recycled materials, the testing of key indicators of post-construction filling quality of the roadbed, and analyses of the deformation pattern of roadbed filled with construction waste. Additionally, the ABAQUS finite element software was used to establish a numerical model for roadbed deformation and analyze the roadbed deformation under different compaction levels and vehicle load conditions. The experimental results show that the recycled material has a moisture content of 8.5%, water absorption of 11.73%, and an apparent density of 2.61 g/cm<sup>3</sup>, while the liquid limit of fine aggregates is 20% and the plasticity index is 5.4. Although the physical properties are slightly inferior to natural aggregates, its bearing ratio (25–55%) and low expansion characteristics meet the requirements for high-grade highway roadbed filling materials. The roadbed layer with a loose compaction of 250 mm, after eight passes of rolling, showed a settlement difference of less than 5 mm, with the loose compaction coefficient stabilizing between 1.15 and 1.20. Finite element simulations indicated that the total settlement of the roadbed stabilizes at 20–30 mm, and increasing the compaction level to 96% can reduce the settlement by 2–4%. Vehicle overload causes a positive correlation between the vertical displacement and shear stress in the base layer, suggesting the need to strengthen vehicle load control. The findings provide theoretical and technical support for the large-scale application of recycled construction waste materials in roadbed engineering.https://www.mdpi.com/2075-5309/15/5/835recycled materials from construction wasteroadbed deformationcompaction degreefinite element analysisbearing ratio and expansion characteristics |
| spellingShingle | Yuan Mei Hongping Lu Xueyan Wang Bingyu Zhou Ziyang Liu Lu Wang Study on the Application and Deformation Characteristics of Construction Waste Recycled Materials in Highway Subgrade Engineering Buildings recycled materials from construction waste roadbed deformation compaction degree finite element analysis bearing ratio and expansion characteristics |
| title | Study on the Application and Deformation Characteristics of Construction Waste Recycled Materials in Highway Subgrade Engineering |
| title_full | Study on the Application and Deformation Characteristics of Construction Waste Recycled Materials in Highway Subgrade Engineering |
| title_fullStr | Study on the Application and Deformation Characteristics of Construction Waste Recycled Materials in Highway Subgrade Engineering |
| title_full_unstemmed | Study on the Application and Deformation Characteristics of Construction Waste Recycled Materials in Highway Subgrade Engineering |
| title_short | Study on the Application and Deformation Characteristics of Construction Waste Recycled Materials in Highway Subgrade Engineering |
| title_sort | study on the application and deformation characteristics of construction waste recycled materials in highway subgrade engineering |
| topic | recycled materials from construction waste roadbed deformation compaction degree finite element analysis bearing ratio and expansion characteristics |
| url | https://www.mdpi.com/2075-5309/15/5/835 |
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