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Effects of the reinforcement content and reinforcement scale on the shear strength characteristics of mechanically biologically treated waste

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Abstract

Mechanical and biological treatment (MBT), which can be used for waste reduction and for the burning of methane from biological treatments to generate electricity and heating, has become a popular research topic in environmental geotechnical engineering. This study investigated the mechanical behaviour of MBT waste and the effects of different reinforcement contents and reinforcement scales on its shear strength characteristics, and 68 groups of MBT waste samples from the Hangzhou Tianziling landfill were tested in the laboratory with a direct shear test apparatus. The samples exhibited displacement hardening behaviour in their mechanical response. The results show that the content and scale of the reinforced materials in MBT waste play an important role in the strength characteristics of MBT waste, and graphs showing the variation of the MBT waste shear strength and shear strength parameters with different reinforcement contents and reinforcement scales are shown. The range of cohesion c is 6.0–12.0 kPa, and the internal friction angle φ is 15.6–26.6°, respectively. The results of this study provide a reference for the assessment of slope stability at MBT landfills.

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Data availability

The datasets used and analysed in the current study are available from the corresponding author on reasonable request.

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Acknowledgements

We thank the Hangzhou Environmental Group for their assistance.

Funding

This research was funded by the National Natural Science Foundation of China (Grant numbers 51978625 and 51678532) and Zhejiang Provincial Natural Science Foundation of China (Grant number LZ21E080003).

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Contributions

BW conducted the direct shear test on Hangzhou Tianziling MBT waste and analysed and interpreted the effects of the RC and reinforcement scale on the shear strength of MBT waste. HX, MH, CN, and TL conducted the direct shear test on Hangzhou Tianziling MBT waste; ZZ analysed the test data and reviewed and revised the manuscript. All authors read and approved the final manuscript.

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Correspondence to Zhenying Zhang.

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The authors declare no competing interests.

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Wang, B., Zhang, Z., Xu, H. et al. Effects of the reinforcement content and reinforcement scale on the shear strength characteristics of mechanically biologically treated waste. Environ Sci Pollut Res 29, 53496–53508 (2022). https://doi.org/10.1007/s11356-022-19320-w

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  • DOI: https://doi.org/10.1007/s11356-022-19320-w

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