Improvement of a lime-based mortar's thermal properties using alkaline activation
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/25827 |
Resumo: | This dissertation was developed as proposed by company Domínio Do Ligante – Argamassas Tradicionais Pré-doseadas Lda. In cooperation with the Department of Geoscience of University of Aveiro, granting the author the conclusion of the second cycle of studies in Geomaterials and Geological Resources by the aforementioned institution. The main goal of this study is to improve the thermal insulation properties, mainly thermal conductivity, of lime-based mortar ‘DDL.ECM Projeção’ through alkali activation instead of traditional hydration. As a secondary objective, the study intends to evaluate the technical viability of the product of the experiment in respect to its mechanical properties, capillary absorption and response to acid dissolution. To fulfill these goals, four laboratory trials took place. In each trial, a control group and two test groups were prepared by mixing the mortar with aqueous solutions of sodium hydroxide and potassium hydroxide, respectively, at a concentration of 3 molar, with the control group being hydrated with water only. The mixtures are then cast in molds and left to cure until demolding. After this, the specimens are to be teste according to the parameters of the study. The four experimental procedure trials were incapable of producing a sufficient number of viable specimens for testing given their fragility and inconsistency. These results rend impossible de measuring of the properties at study in order to resolve the problem question, as such, the main goal of the dissertation is inconclusive. The secondary goal, however, is achieved, affirming the technical unviability of alkali activation of DDL.ECM Projeção by the methods employed in this procedure. It is concluded that the CaO content in the mortar is inadequate for this type of process when compared to the inferior content of either SiO2 and Al2O3; not allowing the formation of a stable hybrid system |
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Improvement of a lime-based mortar's thermal properties using alkaline activationAlkali activationOrdinary portland cementAluminosilicateAlkali hydroxideThis dissertation was developed as proposed by company Domínio Do Ligante – Argamassas Tradicionais Pré-doseadas Lda. In cooperation with the Department of Geoscience of University of Aveiro, granting the author the conclusion of the second cycle of studies in Geomaterials and Geological Resources by the aforementioned institution. The main goal of this study is to improve the thermal insulation properties, mainly thermal conductivity, of lime-based mortar ‘DDL.ECM Projeção’ through alkali activation instead of traditional hydration. As a secondary objective, the study intends to evaluate the technical viability of the product of the experiment in respect to its mechanical properties, capillary absorption and response to acid dissolution. To fulfill these goals, four laboratory trials took place. In each trial, a control group and two test groups were prepared by mixing the mortar with aqueous solutions of sodium hydroxide and potassium hydroxide, respectively, at a concentration of 3 molar, with the control group being hydrated with water only. The mixtures are then cast in molds and left to cure until demolding. After this, the specimens are to be teste according to the parameters of the study. The four experimental procedure trials were incapable of producing a sufficient number of viable specimens for testing given their fragility and inconsistency. These results rend impossible de measuring of the properties at study in order to resolve the problem question, as such, the main goal of the dissertation is inconclusive. The secondary goal, however, is achieved, affirming the technical unviability of alkali activation of DDL.ECM Projeção by the methods employed in this procedure. It is concluded that the CaO content in the mortar is inadequate for this type of process when compared to the inferior content of either SiO2 and Al2O3; not allowing the formation of a stable hybrid systemEsta dissertação foi desenvolvida como proposto pela empresa Domínio Do Ligante – Argamassas Tradicionais Pré-doseadas Lda. em cooperação com o Departamento de Geociências da Universidade de Aveiro, concedendo ao autor a conclusão do segundo ciclo de estudos em Geomateriais e Recursos Geológicos pela instituição supracitada. O objetivo principal deste estudo é melhorar as propriedades de isolamento térmico, nomeadamente a condutividade térmica, da argamassa de cal ‘DDL.ECM Projeção’ procedendo à ativação alcalina da mesma ao invés da hidratação tradicional. Como objetivo secundário pretende-se avaliar ainda a viabilidade técnica do produto desta experiência no que diz respeito a propriedades mecânicas, absorção por capilaridade e resposta à dissolução ácida. Para cumprir estes objetivos, quatro ensaios laboratoriais foram levados a cabo. Em cada ensaio, um grupo de controlo e dois grupos de teste foram preparados misturando a argamassa com soluções aquosas de hidróxido de sódio e hidróxido de potássio, respetivamente, a uma concentração de 3 molar, sendo que o grupo de controlo foi apenas hidratado com água. As misturas foram então aplicadas em moldes e deixadas a curar até ao desmolde. Após isto, os espécimes seriam testados de acordo com os parâmetros em causa. Os quatro ensaios do procedimento experimental não foram capazes de produzir um suficiente número de espécimes viáveis para testar dada a fragilidade ou inconsistência dos mesmos. Estes resultados tornam impossível a medição das propriedades em estudo para resolução da questão problema, sendo o objetivo principal da dissertação inconclusivo. Cumpre-se, no entanto, o objetivo secundário afirmando a inviabilidade técnica da ativação alcalina da argamassa DDL.ECM Projeção pelos métodos utilizados neste procedimento. Conclui-se que o conteúdo de CaO da argamassa é inadequado para a realização deste tipo de processo quando comparado com o muito inferior conteúdo quer de SiO2 quer de Al2O3; não permitindo a criação de um sistema híbrido estável2021-01-25T00:00:00Z2018-12-20T00:00:00Z2018-12-20info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10773/25827TID:202237338engMatos, Fábio André Cancelasinfo: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:RCAAP2024-02-22T11:50:03Zoai:ria.ua.pt:10773/25827Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:58:59.363585Repositório 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 |
Improvement of a lime-based mortar's thermal properties using alkaline activation |
title |
Improvement of a lime-based mortar's thermal properties using alkaline activation |
spellingShingle |
Improvement of a lime-based mortar's thermal properties using alkaline activation Matos, Fábio André Cancelas Alkali activation Ordinary portland cement Aluminosilicate Alkali hydroxide |
title_short |
Improvement of a lime-based mortar's thermal properties using alkaline activation |
title_full |
Improvement of a lime-based mortar's thermal properties using alkaline activation |
title_fullStr |
Improvement of a lime-based mortar's thermal properties using alkaline activation |
title_full_unstemmed |
Improvement of a lime-based mortar's thermal properties using alkaline activation |
title_sort |
Improvement of a lime-based mortar's thermal properties using alkaline activation |
author |
Matos, Fábio André Cancelas |
author_facet |
Matos, Fábio André Cancelas |
author_role |
author |
dc.contributor.author.fl_str_mv |
Matos, Fábio André Cancelas |
dc.subject.por.fl_str_mv |
Alkali activation Ordinary portland cement Aluminosilicate Alkali hydroxide |
topic |
Alkali activation Ordinary portland cement Aluminosilicate Alkali hydroxide |
description |
This dissertation was developed as proposed by company Domínio Do Ligante – Argamassas Tradicionais Pré-doseadas Lda. In cooperation with the Department of Geoscience of University of Aveiro, granting the author the conclusion of the second cycle of studies in Geomaterials and Geological Resources by the aforementioned institution. The main goal of this study is to improve the thermal insulation properties, mainly thermal conductivity, of lime-based mortar ‘DDL.ECM Projeção’ through alkali activation instead of traditional hydration. As a secondary objective, the study intends to evaluate the technical viability of the product of the experiment in respect to its mechanical properties, capillary absorption and response to acid dissolution. To fulfill these goals, four laboratory trials took place. In each trial, a control group and two test groups were prepared by mixing the mortar with aqueous solutions of sodium hydroxide and potassium hydroxide, respectively, at a concentration of 3 molar, with the control group being hydrated with water only. The mixtures are then cast in molds and left to cure until demolding. After this, the specimens are to be teste according to the parameters of the study. The four experimental procedure trials were incapable of producing a sufficient number of viable specimens for testing given their fragility and inconsistency. These results rend impossible de measuring of the properties at study in order to resolve the problem question, as such, the main goal of the dissertation is inconclusive. The secondary goal, however, is achieved, affirming the technical unviability of alkali activation of DDL.ECM Projeção by the methods employed in this procedure. It is concluded that the CaO content in the mortar is inadequate for this type of process when compared to the inferior content of either SiO2 and Al2O3; not allowing the formation of a stable hybrid system |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-20T00:00:00Z 2018-12-20 2021-01-25T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10773/25827 TID:202237338 |
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http://hdl.handle.net/10773/25827 |
identifier_str_mv |
TID:202237338 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
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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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799137643996381184 |