The effect of differential mineral shrinkage on crack formation and network geometry
Abstract Rock, concrete, and other engineered materials are often composed of several minerals that change volumetrically in response to variations in the moisture content of the local environment. Such differential shrinkage is caused by varying shrinkage rates between mineral compositions during d...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-12-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-23789-3 |
| _version_ | 1797977471089377280 |
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| author | Jeremy E. Trageser Chven A. Mitchell Reese E. Jones Edward N. Matteo Jessica M. Rimsza Laura J. Pyrak-Nolte |
| author_facet | Jeremy E. Trageser Chven A. Mitchell Reese E. Jones Edward N. Matteo Jessica M. Rimsza Laura J. Pyrak-Nolte |
| author_sort | Jeremy E. Trageser |
| collection | DOAJ |
| description | Abstract Rock, concrete, and other engineered materials are often composed of several minerals that change volumetrically in response to variations in the moisture content of the local environment. Such differential shrinkage is caused by varying shrinkage rates between mineral compositions during dehydration. Using both 3D X-ray imaging of geo-architected samples and peridynamic (PD) numerical simulations, we show that the spatial distribution of the clay affects the crack network geometry with distributed clay particles yielding the most complex crack networks and percent damage (99.56%), along with a 60% reduction in material strength. We also demonstrate that crack formation, growth, coalescence, and distribution during dehydration, are controlled by the differential shrinkage rates between a highly shrinkable clay and a homogeneous mortar matrix. Sensitivity tests performed with the PD models show a clay shrinkage parameter of 0.4 yields considerable damage, and reductions in the parameter can result in a significant reduction in fracturing and an increase in material strength. Additionally, isolated clay inclusions induced localized fracturing predominantly due to debonding between the clay and matrix. These insights indicate differential shrinkage is a source of potential failure in natural and engineered barriers used to sequester anthropogenic waste. |
| first_indexed | 2024-04-11T05:08:33Z |
| format | Article |
| id | doaj.art-63c15c186dfe4011916b0d2b14e1c986 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-11T05:08:33Z |
| publishDate | 2022-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-63c15c186dfe4011916b0d2b14e1c9862022-12-25T12:11:48ZengNature PortfolioScientific Reports2045-23222022-12-0112112010.1038/s41598-022-23789-3The effect of differential mineral shrinkage on crack formation and network geometryJeremy E. Trageser0Chven A. Mitchell1Reese E. Jones2Edward N. Matteo3Jessica M. Rimsza4Laura J. Pyrak-Nolte5Center for Computing Research, Sandia National LaboratoriesDepartment of Earth, Atmospheric, and Planetary Sciences, Purdue UniversityMechanics of Materials, Sandia National LaboratoriesNuclear Waste Disposal Research and Analysis, Sandia National LaboratoriesGeochemistry Department, Sandia National LaboratoriesDepartment of Earth, Atmospheric, and Planetary Sciences, Purdue UniversityAbstract Rock, concrete, and other engineered materials are often composed of several minerals that change volumetrically in response to variations in the moisture content of the local environment. Such differential shrinkage is caused by varying shrinkage rates between mineral compositions during dehydration. Using both 3D X-ray imaging of geo-architected samples and peridynamic (PD) numerical simulations, we show that the spatial distribution of the clay affects the crack network geometry with distributed clay particles yielding the most complex crack networks and percent damage (99.56%), along with a 60% reduction in material strength. We also demonstrate that crack formation, growth, coalescence, and distribution during dehydration, are controlled by the differential shrinkage rates between a highly shrinkable clay and a homogeneous mortar matrix. Sensitivity tests performed with the PD models show a clay shrinkage parameter of 0.4 yields considerable damage, and reductions in the parameter can result in a significant reduction in fracturing and an increase in material strength. Additionally, isolated clay inclusions induced localized fracturing predominantly due to debonding between the clay and matrix. These insights indicate differential shrinkage is a source of potential failure in natural and engineered barriers used to sequester anthropogenic waste.https://doi.org/10.1038/s41598-022-23789-3 |
| spellingShingle | Jeremy E. Trageser Chven A. Mitchell Reese E. Jones Edward N. Matteo Jessica M. Rimsza Laura J. Pyrak-Nolte The effect of differential mineral shrinkage on crack formation and network geometry Scientific Reports |
| title | The effect of differential mineral shrinkage on crack formation and network geometry |
| title_full | The effect of differential mineral shrinkage on crack formation and network geometry |
| title_fullStr | The effect of differential mineral shrinkage on crack formation and network geometry |
| title_full_unstemmed | The effect of differential mineral shrinkage on crack formation and network geometry |
| title_short | The effect of differential mineral shrinkage on crack formation and network geometry |
| title_sort | effect of differential mineral shrinkage on crack formation and network geometry |
| url | https://doi.org/10.1038/s41598-022-23789-3 |
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