Analysis of the microstructure of microbial solidified sand and engineering residue based on CT scanning
A close relationship exists between the pore network structure of microbial solidified soil and its macroscopic mechanical properties. The microbial solidified engineering residue and sand were scanned by computed tomography (CT), and a three-dimensional model of the sample was established by digita...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2024-03-01
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| Series: | Biogeotechnics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949929123000542 |
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| author | Minxia Zhang Congrui Feng Xiang He Ping Xu |
| author_facet | Minxia Zhang Congrui Feng Xiang He Ping Xu |
| author_sort | Minxia Zhang |
| collection | DOAJ |
| description | A close relationship exists between the pore network structure of microbial solidified soil and its macroscopic mechanical properties. The microbial solidified engineering residue and sand were scanned by computed tomography (CT), and a three-dimensional model of the sample was established by digital image processing. A spatial pore network ball-stick model of the representative elementary volume (REV) was established, and the REV parameters of the sample were calculated. The pore radius, throat radius, pore coordination number, and throat length were normally distributed. The soil particle size was larger after solidification. The calcium carbonate content of the microbial solidified engineering residue’s consolidated layer decreased with the soil depth, the porosity increased, the pore and throat network developed, and the ultimate structure was relatively stable. The calcium carbonate content of the microbial solidified sand’s consolidated layer decreased and increased with the soil depth. The content reached the maximum, the hardness of the consolidated layer was the highest, and the development of the pore and throat network was optimum at a depth of 10–15 mm. |
| format | Article |
| id | doaj-art-5d60899af9804ad7bf6d50b521a6bb4f |
| institution | DOAJ |
| issn | 2949-9291 |
| language | English |
| publishDate | 2024-03-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Biogeotechnics |
| spelling | doaj-art-5d60899af9804ad7bf6d50b521a6bb4f2025-08-20T03:21:16ZengKeAi Communications Co., Ltd.Biogeotechnics2949-92912024-03-012110005410.1016/j.bgtech.2023.100054Analysis of the microstructure of microbial solidified sand and engineering residue based on CT scanningMinxia Zhang0Congrui Feng1Xiang He2Ping Xu3School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China; Corresponding author.School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, SingaporeSchool of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaA close relationship exists between the pore network structure of microbial solidified soil and its macroscopic mechanical properties. The microbial solidified engineering residue and sand were scanned by computed tomography (CT), and a three-dimensional model of the sample was established by digital image processing. A spatial pore network ball-stick model of the representative elementary volume (REV) was established, and the REV parameters of the sample were calculated. The pore radius, throat radius, pore coordination number, and throat length were normally distributed. The soil particle size was larger after solidification. The calcium carbonate content of the microbial solidified engineering residue’s consolidated layer decreased with the soil depth, the porosity increased, the pore and throat network developed, and the ultimate structure was relatively stable. The calcium carbonate content of the microbial solidified sand’s consolidated layer decreased and increased with the soil depth. The content reached the maximum, the hardness of the consolidated layer was the highest, and the development of the pore and throat network was optimum at a depth of 10–15 mm.http://www.sciencedirect.com/science/article/pii/S2949929123000542BiocementationCT scanning3D reconstructionPore networkCalcium carbonate |
| spellingShingle | Minxia Zhang Congrui Feng Xiang He Ping Xu Analysis of the microstructure of microbial solidified sand and engineering residue based on CT scanning Biogeotechnics Biocementation CT scanning 3D reconstruction Pore network Calcium carbonate |
| title | Analysis of the microstructure of microbial solidified sand and engineering residue based on CT scanning |
| title_full | Analysis of the microstructure of microbial solidified sand and engineering residue based on CT scanning |
| title_fullStr | Analysis of the microstructure of microbial solidified sand and engineering residue based on CT scanning |
| title_full_unstemmed | Analysis of the microstructure of microbial solidified sand and engineering residue based on CT scanning |
| title_short | Analysis of the microstructure of microbial solidified sand and engineering residue based on CT scanning |
| title_sort | analysis of the microstructure of microbial solidified sand and engineering residue based on ct scanning |
| topic | Biocementation CT scanning 3D reconstruction Pore network Calcium carbonate |
| url | http://www.sciencedirect.com/science/article/pii/S2949929123000542 |
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