Incorportion of Sludges from aWater Treatment Plant in Cement Mortars
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://repositorio.lnec.pt:8080/jspui/handle/123456789/17671 |
Resumo: | The results of the characterization of the sludge from a Portuguese water treatment plant and their leachates are presented. Dewatered sludge contains basically water, calcium, aluminium and silica, with an organic matter content of about 6%. The mineralogical constituents present in heated sludge are mainly calcite and clay minerals. Gibbsite is present only in the sludge heated at 105ºC and calcium aluminate and calcium oxide are only present in the sample heated at 700ºC. Thermal treatment does not remove the entire polymer and coagulant initially within the sludge. Sludges dewatered or heated at 105ºC inhibit the setting and hardening of the paste and the mortar so, and incorporation in mortars it is only feasible after treatment of the sludges at not less then 450ºC with an increase of the initial setting time but a decrease of the mechanical strength. |
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Incorportion of Sludges from aWater Treatment Plant in Cement MortarsSludgesLeachatesWastesCement mortarsThe results of the characterization of the sludge from a Portuguese water treatment plant and their leachates are presented. Dewatered sludge contains basically water, calcium, aluminium and silica, with an organic matter content of about 6%. The mineralogical constituents present in heated sludge are mainly calcite and clay minerals. Gibbsite is present only in the sludge heated at 105ºC and calcium aluminate and calcium oxide are only present in the sample heated at 700ºC. Thermal treatment does not remove the entire polymer and coagulant initially within the sludge. Sludges dewatered or heated at 105ºC inhibit the setting and hardening of the paste and the mortar so, and incorporation in mortars it is only feasible after treatment of the sludges at not less then 450ºC with an increase of the initial setting time but a decrease of the mechanical strength.2010-01-18T10:49:45Z2010-04-26T16:34:17Z2014-10-20T15:58:16Z2017-04-12T16:24:25Z2004-01-01T00:00:00Z2004conference objectinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://repositorio.lnec.pt:8080/jspui/handle/123456789/17671engEsteves, A.Gonçalves, A.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-09-28T03:03:24Zoai:localhost:123456789/17671Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-09-28T03:03:24Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Incorportion of Sludges from aWater Treatment Plant in Cement Mortars |
title |
Incorportion of Sludges from aWater Treatment Plant in Cement Mortars |
spellingShingle |
Incorportion of Sludges from aWater Treatment Plant in Cement Mortars Esteves, A. Sludges Leachates Wastes Cement mortars |
title_short |
Incorportion of Sludges from aWater Treatment Plant in Cement Mortars |
title_full |
Incorportion of Sludges from aWater Treatment Plant in Cement Mortars |
title_fullStr |
Incorportion of Sludges from aWater Treatment Plant in Cement Mortars |
title_full_unstemmed |
Incorportion of Sludges from aWater Treatment Plant in Cement Mortars |
title_sort |
Incorportion of Sludges from aWater Treatment Plant in Cement Mortars |
author |
Esteves, A. |
author_facet |
Esteves, A. Gonçalves, A. |
author_role |
author |
author2 |
Gonçalves, A. |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Esteves, A. Gonçalves, A. |
dc.subject.por.fl_str_mv |
Sludges Leachates Wastes Cement mortars |
topic |
Sludges Leachates Wastes Cement mortars |
description |
The results of the characterization of the sludge from a Portuguese water treatment plant and their leachates are presented. Dewatered sludge contains basically water, calcium, aluminium and silica, with an organic matter content of about 6%. The mineralogical constituents present in heated sludge are mainly calcite and clay minerals. Gibbsite is present only in the sludge heated at 105ºC and calcium aluminate and calcium oxide are only present in the sample heated at 700ºC. Thermal treatment does not remove the entire polymer and coagulant initially within the sludge. Sludges dewatered or heated at 105ºC inhibit the setting and hardening of the paste and the mortar so, and incorporation in mortars it is only feasible after treatment of the sludges at not less then 450ºC with an increase of the initial setting time but a decrease of the mechanical strength. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-01-01T00:00:00Z 2004 2010-01-18T10:49:45Z 2010-04-26T16:34:17Z 2014-10-20T15:58:16Z 2017-04-12T16:24:25Z |
dc.type.driver.fl_str_mv |
conference object |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.lnec.pt:8080/jspui/handle/123456789/17671 |
url |
http://repositorio.lnec.pt:8080/jspui/handle/123456789/17671 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
mluisa.alvim@gmail.com |
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1817548529213636608 |