Incorportion of Sludges from aWater Treatment Plant in Cement Mortars

Bibliographic Details
Main Author: Esteves, A.
Publication Date: 2004
Other Authors: Gonçalves, A.
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: http://repositorio.lnec.pt:8080/jspui/handle/123456789/17671
Summary: 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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spelling 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:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2025-05-17T02:59:07Zoai:localhost:123456789/17671Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-29T07:32:57.793309Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
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:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
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instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
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collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
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