Tensile Strength of Artificially Cemented Sandstone Generated via Microbially Induced Carbonate Precipitation
Artificially bio-cemented sands treated with microbially induced calcite precipitation are weakly cemented rocks representing intermediate materials between locked and carbonate sands. Variations in cementation significantly affect the strength of sample, particularly tensile stregth. The modes of f...
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MDPI AG
2021-08-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/16/4735 |
| _version_ | 1797523044121444352 |
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| author | Charalampos Konstantinou Giovanna Biscontin Fotios Logothetis |
| author_facet | Charalampos Konstantinou Giovanna Biscontin Fotios Logothetis |
| author_sort | Charalampos Konstantinou |
| collection | DOAJ |
| description | Artificially bio-cemented sands treated with microbially induced calcite precipitation are weakly cemented rocks representing intermediate materials between locked and carbonate sands. Variations in cementation significantly affect the strength of sample, particularly tensile stregth. The modes of fracture and the surface characteristics resulting from the indirect tensile strength tests (Brazilian tests) are strongly correlated with the specimen strength and consequently the degree of cementation. This study examines the tensile strength of bio-cemented fine and coarse sands (average particle diameter 0.18 and 1.82 mm, respectively) and investigates failure modes by recording fracture evolution at both sides of specimen and surface characteristics of the reconstructed surfaces. The dimensionless slope parameter <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>Z</mi><mn>2</mn></msub></semantics></math></inline-formula> provided the best fit with respect to tensile strength while the power spectral density was a good indicator of surface anisotropy. Finally, wavelet decomposition allowed for comparison of fracture surface characteristics of the two sands ignoring the grain size effects. |
| first_indexed | 2024-03-10T08:37:51Z |
| format | Article |
| id | doaj.art-30cc4337a53145a59c83307ae95e6c2d |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T08:37:51Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-30cc4337a53145a59c83307ae95e6c2d2023-11-22T08:32:05ZengMDPI AGMaterials1996-19442021-08-011416473510.3390/ma14164735Tensile Strength of Artificially Cemented Sandstone Generated via Microbially Induced Carbonate PrecipitationCharalampos Konstantinou0Giovanna Biscontin1Fotios Logothetis2Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, UKDepartment of Engineering, University of Cambridge, Cambridge CB2 1PZ, UKDepartment of Engineering, University of Cambridge, Cambridge CB2 1PZ, UKArtificially bio-cemented sands treated with microbially induced calcite precipitation are weakly cemented rocks representing intermediate materials between locked and carbonate sands. Variations in cementation significantly affect the strength of sample, particularly tensile stregth. The modes of fracture and the surface characteristics resulting from the indirect tensile strength tests (Brazilian tests) are strongly correlated with the specimen strength and consequently the degree of cementation. This study examines the tensile strength of bio-cemented fine and coarse sands (average particle diameter 0.18 and 1.82 mm, respectively) and investigates failure modes by recording fracture evolution at both sides of specimen and surface characteristics of the reconstructed surfaces. The dimensionless slope parameter <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>Z</mi><mn>2</mn></msub></semantics></math></inline-formula> provided the best fit with respect to tensile strength while the power spectral density was a good indicator of surface anisotropy. Finally, wavelet decomposition allowed for comparison of fracture surface characteristics of the two sands ignoring the grain size effects.https://www.mdpi.com/1996-1944/14/16/4735bio-cementationsandstoneindirect tensile strengthfracture mechanicsfracture surfacegrain size |
| spellingShingle | Charalampos Konstantinou Giovanna Biscontin Fotios Logothetis Tensile Strength of Artificially Cemented Sandstone Generated via Microbially Induced Carbonate Precipitation Materials bio-cementation sandstone indirect tensile strength fracture mechanics fracture surface grain size |
| title | Tensile Strength of Artificially Cemented Sandstone Generated via Microbially Induced Carbonate Precipitation |
| title_full | Tensile Strength of Artificially Cemented Sandstone Generated via Microbially Induced Carbonate Precipitation |
| title_fullStr | Tensile Strength of Artificially Cemented Sandstone Generated via Microbially Induced Carbonate Precipitation |
| title_full_unstemmed | Tensile Strength of Artificially Cemented Sandstone Generated via Microbially Induced Carbonate Precipitation |
| title_short | Tensile Strength of Artificially Cemented Sandstone Generated via Microbially Induced Carbonate Precipitation |
| title_sort | tensile strength of artificially cemented sandstone generated via microbially induced carbonate precipitation |
| topic | bio-cementation sandstone indirect tensile strength fracture mechanics fracture surface grain size |
| url | https://www.mdpi.com/1996-1944/14/16/4735 |
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