Particle crushing and critical state surface of porous granular materials derived from artificial pumice
Crushable porous soils, such as volcanic pumice, are distributed worldwide and cause a variety of engineering problems, such as slope hazards. The mechanical properties of these soils are complicated by their high compressibility due to voids in the particles themselves and changes in the soil grada...
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| Language: | English |
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Elsevier
2025-06-01
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| Series: | Soils and Foundations |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0038080625000241 |
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| author | Itsuki Sato Reiko Kuwano Masahide Otsubo |
| author_facet | Itsuki Sato Reiko Kuwano Masahide Otsubo |
| author_sort | Itsuki Sato |
| collection | DOAJ |
| description | Crushable porous soils, such as volcanic pumice, are distributed worldwide and cause a variety of engineering problems, such as slope hazards. The mechanical properties of these soils are complicated by their high compressibility due to voids in the particles themselves and changes in the soil gradation due to particle crushing. They are usually classified as problematic soils and discussed separately from ordinary granular soils, and their behaviour is not systematically understood. In this study, isotropic and triaxial compression tests were conducted on artificial pumice in order to determine the relationship between the mechanical properties and the particle crushing of crushable porous granular materials. The results showed that the mechanical behaviour of artificial pumice, representative of such materials, can be explained using a particle crushing index, which is related to the degree of efficient packing. Furthermore, a new critical state surface equation was proposed. It is applicable to crushable porous granular materials and shows the potential for expressing the critical state or isotropic consolidation state of such materials as a single surface in a three-dimensional space consisting of three axes: the stress − void ratio − crushing index. The validity of this new equation was confirmed by applying it to natural pumice from previous research. |
| format | Article |
| id | doaj-art-a7bd1499be5442b3b985da0458890dc3 |
| institution | OA Journals |
| issn | 2524-1788 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Soils and Foundations |
| spelling | doaj-art-a7bd1499be5442b3b985da0458890dc32025-08-20T02:36:30ZengElsevierSoils and Foundations2524-17882025-06-0165310159010.1016/j.sandf.2025.101590Particle crushing and critical state surface of porous granular materials derived from artificial pumiceItsuki Sato0Reiko Kuwano1Masahide Otsubo2Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan; Port and Airport Research Institute, National Institute of Maritime, Port and Aviation Technology, 3-1-1, Nagase, Yokosuka City 239-0826, Japan; Corresponding author at: Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan.Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, JapanInstitute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan; Port and Airport Research Institute, National Institute of Maritime, Port and Aviation Technology, 3-1-1, Nagase, Yokosuka City 239-0826, JapanCrushable porous soils, such as volcanic pumice, are distributed worldwide and cause a variety of engineering problems, such as slope hazards. The mechanical properties of these soils are complicated by their high compressibility due to voids in the particles themselves and changes in the soil gradation due to particle crushing. They are usually classified as problematic soils and discussed separately from ordinary granular soils, and their behaviour is not systematically understood. In this study, isotropic and triaxial compression tests were conducted on artificial pumice in order to determine the relationship between the mechanical properties and the particle crushing of crushable porous granular materials. The results showed that the mechanical behaviour of artificial pumice, representative of such materials, can be explained using a particle crushing index, which is related to the degree of efficient packing. Furthermore, a new critical state surface equation was proposed. It is applicable to crushable porous granular materials and shows the potential for expressing the critical state or isotropic consolidation state of such materials as a single surface in a three-dimensional space consisting of three axes: the stress − void ratio − crushing index. The validity of this new equation was confirmed by applying it to natural pumice from previous research.http://www.sciencedirect.com/science/article/pii/S0038080625000241Triaxial testVolcanic pumicePorous soilParticle crushingParticle breakageGrain crushing |
| spellingShingle | Itsuki Sato Reiko Kuwano Masahide Otsubo Particle crushing and critical state surface of porous granular materials derived from artificial pumice Soils and Foundations Triaxial test Volcanic pumice Porous soil Particle crushing Particle breakage Grain crushing |
| title | Particle crushing and critical state surface of porous granular materials derived from artificial pumice |
| title_full | Particle crushing and critical state surface of porous granular materials derived from artificial pumice |
| title_fullStr | Particle crushing and critical state surface of porous granular materials derived from artificial pumice |
| title_full_unstemmed | Particle crushing and critical state surface of porous granular materials derived from artificial pumice |
| title_short | Particle crushing and critical state surface of porous granular materials derived from artificial pumice |
| title_sort | particle crushing and critical state surface of porous granular materials derived from artificial pumice |
| topic | Triaxial test Volcanic pumice Porous soil Particle crushing Particle breakage Grain crushing |
| url | http://www.sciencedirect.com/science/article/pii/S0038080625000241 |
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