Experimental Investigation of the Pressure of Crystallization of Ca(OH)2: Implications for the Reactive Cracking Process
Abstract Mineral hydration and carbonation can produce large solid volume increases, deviatoric stress, and fracture, which in turn can maintain or enhance permeability and reactive surface area. Despite the potential importance of this process, our basic physical understanding of the conditions und...
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| Format: | Article |
| Language: | English |
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Wiley
2018-09-01
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| Series: | Geochemistry, Geophysics, Geosystems |
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| Online Access: | https://doi.org/10.1029/2018GC007609 |
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| author | S. Lambart H. M. Savage B. G. Robinson P. B. Kelemen |
| author_facet | S. Lambart H. M. Savage B. G. Robinson P. B. Kelemen |
| author_sort | S. Lambart |
| collection | DOAJ |
| description | Abstract Mineral hydration and carbonation can produce large solid volume increases, deviatoric stress, and fracture, which in turn can maintain or enhance permeability and reactive surface area. Despite the potential importance of this process, our basic physical understanding of the conditions under which a given reaction will drive fracture (if at all) is relatively limited. Our hydration experiments on CaO under uniaxial loads of 0.1 to 27 MPa show that strain and strain rate are proportional to the square root of time and exhibit negative, power law dependence on uniaxial load, suggesting that (1) fluid transport via capillary flow is rate limiting and (2) decreasing strain rate with increasing confining pressure might be a limiting factor in reaction driven cracking at depth. However, our experiments also demonstrate that crystallization pressure due to hydration exceeds 27 MPa (consistent with a maximum crystallization pressure of 153 MPa for the same reaction, Wolterbeek et al., https://doi.org/10.1007/s11440‐017‐0533‐5). As a result, full hydration can be achieved at crustal depths exceeding 1 km, which is relevant for engineered fracture systems. |
| format | Article |
| id | doaj-art-e98bce7aec2247218d611caacdd1f530 |
| institution | Kabale University |
| issn | 1525-2027 |
| language | English |
| publishDate | 2018-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geochemistry, Geophysics, Geosystems |
| spelling | doaj-art-e98bce7aec2247218d611caacdd1f5302025-08-20T03:32:15ZengWileyGeochemistry, Geophysics, Geosystems1525-20272018-09-011993448345810.1029/2018GC007609Experimental Investigation of the Pressure of Crystallization of Ca(OH)2: Implications for the Reactive Cracking ProcessS. Lambart0H. M. Savage1B. G. Robinson2P. B. Kelemen3Lamont‐Doherty Earth Observatory Columbia University Palisades NY USALamont‐Doherty Earth Observatory Columbia University Palisades NY USALamont‐Doherty Earth Observatory Columbia University Palisades NY USALamont‐Doherty Earth Observatory Columbia University Palisades NY USAAbstract Mineral hydration and carbonation can produce large solid volume increases, deviatoric stress, and fracture, which in turn can maintain or enhance permeability and reactive surface area. Despite the potential importance of this process, our basic physical understanding of the conditions under which a given reaction will drive fracture (if at all) is relatively limited. Our hydration experiments on CaO under uniaxial loads of 0.1 to 27 MPa show that strain and strain rate are proportional to the square root of time and exhibit negative, power law dependence on uniaxial load, suggesting that (1) fluid transport via capillary flow is rate limiting and (2) decreasing strain rate with increasing confining pressure might be a limiting factor in reaction driven cracking at depth. However, our experiments also demonstrate that crystallization pressure due to hydration exceeds 27 MPa (consistent with a maximum crystallization pressure of 153 MPa for the same reaction, Wolterbeek et al., https://doi.org/10.1007/s11440‐017‐0533‐5). As a result, full hydration can be achieved at crustal depths exceeding 1 km, which is relevant for engineered fracture systems.https://doi.org/10.1029/2018GC007609CaO hydrationpressure of crystallizationfluid transportexperimentsreactive cracking |
| spellingShingle | S. Lambart H. M. Savage B. G. Robinson P. B. Kelemen Experimental Investigation of the Pressure of Crystallization of Ca(OH)2: Implications for the Reactive Cracking Process Geochemistry, Geophysics, Geosystems CaO hydration pressure of crystallization fluid transport experiments reactive cracking |
| title | Experimental Investigation of the Pressure of Crystallization of Ca(OH)2: Implications for the Reactive Cracking Process |
| title_full | Experimental Investigation of the Pressure of Crystallization of Ca(OH)2: Implications for the Reactive Cracking Process |
| title_fullStr | Experimental Investigation of the Pressure of Crystallization of Ca(OH)2: Implications for the Reactive Cracking Process |
| title_full_unstemmed | Experimental Investigation of the Pressure of Crystallization of Ca(OH)2: Implications for the Reactive Cracking Process |
| title_short | Experimental Investigation of the Pressure of Crystallization of Ca(OH)2: Implications for the Reactive Cracking Process |
| title_sort | experimental investigation of the pressure of crystallization of ca oh 2 implications for the reactive cracking process |
| topic | CaO hydration pressure of crystallization fluid transport experiments reactive cracking |
| url | https://doi.org/10.1029/2018GC007609 |
| work_keys_str_mv | AT slambart experimentalinvestigationofthepressureofcrystallizationofcaoh2implicationsforthereactivecrackingprocess AT hmsavage experimentalinvestigationofthepressureofcrystallizationofcaoh2implicationsforthereactivecrackingprocess AT bgrobinson experimentalinvestigationofthepressureofcrystallizationofcaoh2implicationsforthereactivecrackingprocess AT pbkelemen experimentalinvestigationofthepressureofcrystallizationofcaoh2implicationsforthereactivecrackingprocess |