Sterile Clay Pozzolans from Phosphate Mining

Detalhes bibliográficos
Autor(a) principal: Matos Neto,José Afonso de
Data de Publicação: 2015
Outros Autores: Resende,Domingos Sávio de, Silva Neto,João Trajano da, Gouveia,Antônio Maria Claret de, Aguilar,Maria Teresa Paulino de, Bezerra,Augusto Cesar da Silva
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392015000800230
Resumo: 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.
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spelling Sterile Clay Pozzolans from Phosphate Miningclayspozzolanic activitysustainabilityThe 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.ABM, ABC, ABPol2015-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392015000800230Materials Research v.18 suppl.2 2015reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1516-1439.367014info:eu-repo/semantics/openAccessMatos Neto,José Afonso deResende,Domingos Sávio deSilva Neto,João Trajano daGouveia,Antônio Maria Claret deAguilar,Maria Teresa Paulino deBezerra,Augusto Cesar da Silvaeng2016-01-04T00:00:00Zoai:scielo:S1516-14392015000800230Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2016-01-04T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Sterile Clay Pozzolans from Phosphate Mining
title Sterile Clay Pozzolans from Phosphate Mining
spellingShingle Sterile Clay Pozzolans from Phosphate Mining
Matos Neto,José Afonso de
clays
pozzolanic activity
sustainability
title_short 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_sort Sterile Clay Pozzolans from Phosphate Mining
author Matos Neto,José Afonso de
author_facet Matos Neto,José Afonso de
Resende,Domingos Sávio de
Silva Neto,João Trajano da
Gouveia,Antônio Maria Claret de
Aguilar,Maria Teresa Paulino de
Bezerra,Augusto Cesar da Silva
author_role author
author2 Resende,Domingos Sávio de
Silva Neto,João Trajano da
Gouveia,Antônio Maria Claret de
Aguilar,Maria Teresa Paulino de
Bezerra,Augusto Cesar da Silva
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Matos Neto,José Afonso de
Resende,Domingos Sávio de
Silva Neto,João Trajano da
Gouveia,Antônio Maria Claret de
Aguilar,Maria Teresa Paulino de
Bezerra,Augusto Cesar da Silva
dc.subject.por.fl_str_mv clays
pozzolanic activity
sustainability
topic clays
pozzolanic activity
sustainability
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.
publishDate 2015
dc.date.none.fl_str_mv 2015-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392015000800230
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392015000800230
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1516-1439.367014
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.18 suppl.2 2015
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
_version_ 1754212666308558848

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