Study on Confined Compression Characteristics and Particle Crushing Law of Phyllite Waste Slag

DOI

10.2991/978-94-6463-449-5_5How to use a DOI?

Keywords

Confined Compression; Phyllite; Compression Deformation; Fragmentation Characteristics; Particle Breakage

Abstract

The particle crushing effect of coarse-grained soil has been widely studied. This study conducted lateral compression tests under high-pressure conditions to study the compression characteristics and particle crushing laws of waste particles from tunnel excavation of phyllite. Samples with continuous and intermittent gradation were set up to analyze the physical parameters such as compression deformation law, gradation curve, crushing index, and plastic work before and after loading. The results show that the strain of each group of samples increases rapidly with stress during the loading process and then gradually stabilizes. The continuous group gradation shows good compressive bearing capacity. As the content of phyllite particles decreases, the overall deformation of the samples can be effectively reduced. Under high stress, the grading of each intermittent grading sample gradually converges to a continuous grading, with similar physical and mechanical properties. The fragmentation indicators applicable to the particles of waste rock in phyllite are B_r and B_g. Establishing a hyperbolic model to fit the plastic work and relative fragmentation rate B_r during the compression process, it was found that fitting the plastic work model can better characterize the fragmentation law of waste particles in phyllite. The research results can provide certain reference and guidance for further understanding the compression characteristics and particle fragmentation laws of soft rock waste materials such as phyllite, as well as for the filling of geotechnical engineering structures.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Yuchen Ji
AU  - Xu Wang
AU  - Yanjie Zhang
AU  - Chunxiang Guo
AU  - Jiandong Li
PY  - 2024
DA  - 2024/06/30
TI  - Study on Confined Compression Characteristics and Particle Crushing Law of Phyllite Waste Slag
BT  - Proceedings of the 2024 8th International Conference on Civil Architecture and Structural Engineering (ICCASE 2024)
PB  - Atlantis Press
SP  - 38
EP  - 57
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-449-5_5
DO  - 10.2991/978-94-6463-449-5_5
ID  - Ji2024
ER  -