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Cement-based solidification of ferro-alloy solid wastes
A literature review presents a background to cement-based S/S, cement hydration behaviour and mechanisms by which metals could be contained in S/S products, based on proposals by other workers. Cr and Zn were of particular interest in this work due to high levels being found in the wastes and the di...
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| Format: | Thesis |
| Language: | English |
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Department of Chemical Engineering
2024
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| _version_ | 1867613268126728192 |
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| access_status_str | Open Access |
| author | Cohen, Brett |
| author_browse | Cohen, Brett |
| author_facet | Cohen, Brett |
| author_sort | Cohen, Brett |
| collection | Thesis |
| description | A literature review presents a background to cement-based S/S, cement hydration behaviour and mechanisms by which metals could be contained in S/S products, based on proposals by other workers. Cr and Zn were of particular interest in this work due to high levels being found in the wastes and the different mechanisms by which they have been found to interact with cement. Preliminary experiments identified conditions which were conducive to the effective setting of the monolith. Three operational variables were chosen as having significance in determining the quality of the resultant S/S product, namely water to solids ratio, cement content and curing time. Effective setting of the cement-waste product was found to require a preliminary wash of the untreated dust to remove much of this soluble chromium and other salts. It was identified furthermore that the solids required higher amounts of water for mixing than would be required for hardened cement pastes and concretes. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/40599 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:26.520Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Department of Chemical Engineering |
| publisherStr | Department of Chemical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/40599 Cement-based solidification of ferro-alloy solid wastes Cohen, Brett Chemical Engineering A literature review presents a background to cement-based S/S, cement hydration behaviour and mechanisms by which metals could be contained in S/S products, based on proposals by other workers. Cr and Zn were of particular interest in this work due to high levels being found in the wastes and the different mechanisms by which they have been found to interact with cement. Preliminary experiments identified conditions which were conducive to the effective setting of the monolith. Three operational variables were chosen as having significance in determining the quality of the resultant S/S product, namely water to solids ratio, cement content and curing time. Effective setting of the cement-waste product was found to require a preliminary wash of the untreated dust to remove much of this soluble chromium and other salts. It was identified furthermore that the solids required higher amounts of water for mixing than would be required for hardened cement pastes and concretes. 2024-10-22T09:20:09Z 2024-10-22T09:20:09Z 1997 2024-07-11T12:11:59Z Thesis / Dissertation Doctoral PhD http://hdl.handle.net/11427/40599 eng application/pdf Department of Chemical Engineering Faculty of Engineering and the Built Environment |
| spellingShingle | Chemical Engineering Cohen, Brett Cement-based solidification of ferro-alloy solid wastes |
| thesis_degree_str | Doctoral |
| title | Cement-based solidification of ferro-alloy solid wastes |
| title_full | Cement-based solidification of ferro-alloy solid wastes |
| title_fullStr | Cement-based solidification of ferro-alloy solid wastes |
| title_full_unstemmed | Cement-based solidification of ferro-alloy solid wastes |
| title_short | Cement-based solidification of ferro-alloy solid wastes |
| title_sort | cement based solidification of ferro alloy solid wastes |
| topic | Chemical Engineering |
| url | http://hdl.handle.net/11427/40599 |
| work_keys_str_mv | AT cohenbrett cementbasedsolidificationofferroalloysolidwastes |