Swelling related to ettringite crystal formation in chromite ore processing residue
Several million tons of Chromite Ore Processing Residue (COPR) were deposited at two sites in New Jersey and Maryland, USA, and over time they exhibited extensive heaving phenomena. Ettringite, a needle-shaped mineral and an expansive mineral commonly recognized in the literature concerning cement-...
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2007
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| Online Access: | http://hdl.handle.net/10725/3232 http://dx.doi.org/10.1007/s10653-007-9097-x http://link.springer.com/article/10.1007/s10653-007-9097-x |
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| _version_ | 1864513460229898240 |
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| author | Moon, Deok Hyun |
| author2 | Dermatas, Dimitris Wazne, Mahmoud Sanchez, Adriana M. Chrysochoou, Maria Grubb, Dennis G. |
| author2_role | author author author author author |
| author_facet | Moon, Deok Hyun Dermatas, Dimitris Wazne, Mahmoud Sanchez, Adriana M. Chrysochoou, Maria Grubb, Dennis G. |
| author_role | author |
| dc.creator.none.fl_str_mv | Moon, Deok Hyun Dermatas, Dimitris Wazne, Mahmoud Sanchez, Adriana M. Chrysochoou, Maria Grubb, Dennis G. |
| dc.date.none.fl_str_mv | 2007 2016-03-02T07:10:17Z 2016-03-02T07:10:17Z 2016-03-02 |
| dc.identifier.none.fl_str_mv | 0269-4042 http://hdl.handle.net/10725/3232 http://dx.doi.org/10.1007/s10653-007-9097-x Moon, D. H., Dermatas, D., Wazne, M., Sanchez, A. M., Chrysochoou, M., & Grubb, D. G. (2007). Swelling related to ettringite crystal formation in chromite ore processing residue. Environmental geochemistry and health, 29(4), 289-294. http://link.springer.com/article/10.1007/s10653-007-9097-x |
| dc.language.none.fl_str_mv | en |
| dc.relation.none.fl_str_mv | Environmental Geochemistry and Health |
| dc.rights.*.fl_str_mv | info:eu-repo/semantics/openAccess |
| dc.title.none.fl_str_mv | Swelling related to ettringite crystal formation in chromite ore processing residue |
| dc.type.none.fl_str_mv | Article info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | Several million tons of Chromite Ore Processing Residue (COPR) were deposited at two sites in New Jersey and Maryland, USA, and over time they exhibited extensive heaving phenomena. Ettringite, a needle-shaped mineral and an expansive mineral commonly recognized in the literature concerning cement- and soil, has been identified extensively in numerous COPR samples collected from these sites. It was therefore believed that ettringite formation and its crystal growth are strongly associated with COPR heaving. We investigated the correlation between ettringite and the heaving phenomena in COPR materials that contained no initial ettringite. Two identical COPR samples were exposed to a 4% w/w sulfate solution (25°C, 50°C) in a confined swell test apparatus. Both swell test samples were analyzed by means of X-ray powder diffraction. The peak intensities of newly formed ettringite were more pronounced in the sample tested at 50°C, and swell development was only observed in this sample. Scanning electron microscopy analyses revealed well-crystallized ettringite needles exceeding 40 μm in length for this sample, while ettringite crystals less than 15 μm in length formed in the sample tested at 25°C. Therefore, the results suggest that the quantity of ettringite and the extent of crystallization play a key role in the heave of COPR. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | LAURepo_3f1624994e8994e01eb2135682d255f8 |
| identifier_str_mv | 0269-4042 Moon, D. H., Dermatas, D., Wazne, M., Sanchez, A. M., Chrysochoou, M., & Grubb, D. G. (2007). Swelling related to ettringite crystal formation in chromite ore processing residue. Environmental geochemistry and health, 29(4), 289-294. |
| language_invalid_str_mv | en |
| network_acronym_str | LAURepo |
| network_name_str | Lebanese American University repository |
| oai_identifier_str | oai:laur.lau.edu.lb:10725/3232 |
| publishDate | 2007 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Swelling related to ettringite crystal formation in chromite ore processing residueMoon, Deok HyunDermatas, DimitrisWazne, MahmoudSanchez, Adriana M.Chrysochoou, MariaGrubb, Dennis G.Several million tons of Chromite Ore Processing Residue (COPR) were deposited at two sites in New Jersey and Maryland, USA, and over time they exhibited extensive heaving phenomena. Ettringite, a needle-shaped mineral and an expansive mineral commonly recognized in the literature concerning cement- and soil, has been identified extensively in numerous COPR samples collected from these sites. It was therefore believed that ettringite formation and its crystal growth are strongly associated with COPR heaving. We investigated the correlation between ettringite and the heaving phenomena in COPR materials that contained no initial ettringite. Two identical COPR samples were exposed to a 4% w/w sulfate solution (25°C, 50°C) in a confined swell test apparatus. Both swell test samples were analyzed by means of X-ray powder diffraction. The peak intensities of newly formed ettringite were more pronounced in the sample tested at 50°C, and swell development was only observed in this sample. Scanning electron microscopy analyses revealed well-crystallized ettringite needles exceeding 40 μm in length for this sample, while ettringite crystals less than 15 μm in length formed in the sample tested at 25°C. Therefore, the results suggest that the quantity of ettringite and the extent of crystallization play a key role in the heave of COPR.PublishedN/A2016-03-02T07:10:17Z2016-03-02T07:10:17Z20072016-03-02Articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article0269-4042http://hdl.handle.net/10725/3232http://dx.doi.org/10.1007/s10653-007-9097-xMoon, D. H., Dermatas, D., Wazne, M., Sanchez, A. M., Chrysochoou, M., & Grubb, D. G. (2007). Swelling related to ettringite crystal formation in chromite ore processing residue. Environmental geochemistry and health, 29(4), 289-294.http://link.springer.com/article/10.1007/s10653-007-9097-xenEnvironmental Geochemistry and Healthinfo:eu-repo/semantics/openAccessoai:laur.lau.edu.lb:10725/32322019-02-04T08:53:24Z |
| spellingShingle | Swelling related to ettringite crystal formation in chromite ore processing residue Moon, Deok Hyun |
| status_str | publishedVersion |
| title | Swelling related to ettringite crystal formation in chromite ore processing residue |
| title_full | Swelling related to ettringite crystal formation in chromite ore processing residue |
| title_fullStr | Swelling related to ettringite crystal formation in chromite ore processing residue |
| title_full_unstemmed | Swelling related to ettringite crystal formation in chromite ore processing residue |
| title_short | Swelling related to ettringite crystal formation in chromite ore processing residue |
| title_sort | Swelling related to ettringite crystal formation in chromite ore processing residue |
| url | http://hdl.handle.net/10725/3232 http://dx.doi.org/10.1007/s10653-007-9097-x http://link.springer.com/article/10.1007/s10653-007-9097-x |