Sterile Clay Pozzolans from Phosphate Mining
The work presents the characterization of clays from sterile mining of the concentrated phosphatic materials of Araxá in Minas Gerais as pozzolanic materials. Three clays of distinct tones, namely, yellow (YC), red (RC), and intermediate (IC) clays, were used at different levels of excavation depth....
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2015-11-01
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| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392015000800230&tlng=en |
| _version_ | 1818976663655940096 |
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| author | José Afonso de Matos Neto Domingos Sávio de Resende João Trajano da Silva Neto Antônio Maria Claret de Gouveia Maria Teresa Paulino de Aguilar Augusto Cesar da Silva Bezerra |
| author_facet | José Afonso de Matos Neto Domingos Sávio de Resende João Trajano da Silva Neto Antônio Maria Claret de Gouveia Maria Teresa Paulino de Aguilar Augusto Cesar da Silva Bezerra |
| author_sort | José Afonso de Matos Neto |
| collection | DOAJ |
| description | The work presents the characterization of clays from sterile mining of the concentrated phosphatic materials of Araxá in Minas Gerais as pozzolanic materials. Three clays of distinct tones, namely, yellow (YC), red (RC), and intermediate (IC) clays, were used at different levels of excavation depth. The clays were calcined at three temperatures (680, 760, and 840 °C) in a muffle-type electric oven. The pozzolanic activity levels of the calcined clays was measured through the conductivity change in saturated Ca(OH)2 solutions and also from the result of the compressive failure load achieved by mortars with 35% of the Portland cement replaced with the calcined material. The results indicated that the calcined clays showed a high level of pozzolanic activity and can be used as a partial substitute for Portland cement, thus suggesting the possibility of recovering this sterile material. |
| first_indexed | 2024-12-20T16:15:26Z |
| format | Article |
| id | doaj.art-e96632a7d3be453cb5ab469ae905380c |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-12-20T16:15:26Z |
| publishDate | 2015-11-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-e96632a7d3be453cb5ab469ae905380c2022-12-21T19:33:50ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392015-11-0118suppl 223023410.1590/1516-1439.367014Sterile Clay Pozzolans from Phosphate MiningJosé Afonso de Matos NetoDomingos Sávio de ResendeJoão Trajano da Silva NetoAntônio Maria Claret de GouveiaMaria Teresa Paulino de AguilarAugusto Cesar da Silva BezerraThe work presents the characterization of clays from sterile mining of the concentrated phosphatic materials of Araxá in Minas Gerais as pozzolanic materials. Three clays of distinct tones, namely, yellow (YC), red (RC), and intermediate (IC) clays, were used at different levels of excavation depth. The clays were calcined at three temperatures (680, 760, and 840 °C) in a muffle-type electric oven. The pozzolanic activity levels of the calcined clays was measured through the conductivity change in saturated Ca(OH)2 solutions and also from the result of the compressive failure load achieved by mortars with 35% of the Portland cement replaced with the calcined material. The results indicated that the calcined clays showed a high level of pozzolanic activity and can be used as a partial substitute for Portland cement, thus suggesting the possibility of recovering this sterile material.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392015000800230&tlng=enclayspozzolanic activitysustainability |
| spellingShingle | José Afonso de Matos Neto Domingos Sávio de Resende João Trajano da Silva Neto Antônio Maria Claret de Gouveia Maria Teresa Paulino de Aguilar Augusto Cesar da Silva Bezerra Sterile Clay Pozzolans from Phosphate Mining Materials Research clays pozzolanic activity sustainability |
| title | Sterile Clay Pozzolans from Phosphate Mining |
| title_full | Sterile Clay Pozzolans from Phosphate Mining |
| title_fullStr | Sterile Clay Pozzolans from Phosphate Mining |
| title_full_unstemmed | Sterile Clay Pozzolans from Phosphate Mining |
| title_short | Sterile Clay Pozzolans from Phosphate Mining |
| title_sort | sterile clay pozzolans from phosphate mining |
| topic | clays pozzolanic activity sustainability |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392015000800230&tlng=en |
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