Analysis of the behavior of concrete thermomechanical of low resistance in low ages

Detalhes bibliográficos
Autor(a) principal: Alexandre Jorge Rocha Menezes
Data de Publicação: 2015
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Biblioteca Digital de Teses e Dissertações da UFC
Texto Completo: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16161
Resumo: Great works of infrastructure such as hydroelectric plants require, in it building, large concrete volumes classified as mass concrete structures. These works of power generation are strategic and fundamental for the development of a nation. However, during construction and throughout its life they may have pathological manifestations that compromise its stability. One of the most common problems in this type of structure is cracking caused by heat generated due to the exothermic reaction of cement hydration. Therefore, we had to analyze the thermal behavior of concrete, concrete with similar consistency and resistance like the concrete utilized in construction dam, and analyze how the type of cement utilized and its contents affects these parameters. In addition, we studied the evolution of compressive strength and dynamic modulus of elasticity as the cement hydrates. Finally, we compared the thermal performance of concretes produced with the results obtained from a commercial software. To carry out the experiment, concrete blocks were produced of 1,5m with cements CP II E 32 RS and CP IV 32 with consumption 241,2 kg/m and 330,0 kg/m for thermal analysis, besides cylindrical specimens for the remaining analyzes. The results showed that the thermal behavior of concrete has a small dependence on the type of cement, however the cement content affects too much this behavior, and the cement CP IV 32 showed higher thermal variations. It was also observed that the development of compressive strength is strongly dependent on the cement content, but it has low dependency on the type of cement. Computer modeling presented satisfactory results when it was compared to results of the thermal evolution blocks.
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spelling info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisAnalysis of the behavior of concrete thermomechanical of low resistance in low agesAnÃlise do comportamento termo-mecÃnico de concretos de baixas resistÃncias em baixas idades2015-04-24Antonio Eduardo Bezerra Cabral36365653387http://lattes.cnpq.br/6399451844691825 Jorge Barbosa Soares41441575391Jorge Manuel CaliÃo Lopes de Brito01954460384http://lattes.cnpq.br/5478769910457442Alexandre Jorge Rocha MenezesUniversidade Federal do CearÃPrograma de PÃs-GraduaÃÃo em Engenharia Civil Estruturas e ConstruÃÃo Civil UFCBRConcreto EvoluÃÃo tÃrmica Calor de hidrataÃÃo Modelagem computacionalMass concrete Thermal evolution Heat of hydration Computational modelingCIMENTOGreat works of infrastructure such as hydroelectric plants require, in it building, large concrete volumes classified as mass concrete structures. These works of power generation are strategic and fundamental for the development of a nation. However, during construction and throughout its life they may have pathological manifestations that compromise its stability. One of the most common problems in this type of structure is cracking caused by heat generated due to the exothermic reaction of cement hydration. Therefore, we had to analyze the thermal behavior of concrete, concrete with similar consistency and resistance like the concrete utilized in construction dam, and analyze how the type of cement utilized and its contents affects these parameters. In addition, we studied the evolution of compressive strength and dynamic modulus of elasticity as the cement hydrates. Finally, we compared the thermal performance of concretes produced with the results obtained from a commercial software. To carry out the experiment, concrete blocks were produced of 1,5m with cements CP II E 32 RS and CP IV 32 with consumption 241,2 kg/m and 330,0 kg/m for thermal analysis, besides cylindrical specimens for the remaining analyzes. The results showed that the thermal behavior of concrete has a small dependence on the type of cement, however the cement content affects too much this behavior, and the cement CP IV 32 showed higher thermal variations. It was also observed that the development of compressive strength is strongly dependent on the cement content, but it has low dependency on the type of cement. Computer modeling presented satisfactory results when it was compared to results of the thermal evolution blocks.As grandes obras de infraestrutura como as centrais hidroelÃtricas requerem na sua construÃÃo grandes volumes de concreto, sendo classificadas como estruturas de concreto massa. Essas obras de geraÃÃo de energia sÃo estratÃgicas e fundamentais para o desenvolvimento de uma naÃÃo. Entretanto, durante sua construÃÃo e ao longo de sua vida Ãtil estas podem apresentar manifestaÃÃes patolÃgicas que comprometem sua estabilidade. Um dos problemas mais comuns nesse tipo de estrutura à a fissuraÃÃo causada pela energia tÃrmica gerada devido à reaÃÃo exotÃrmica de hidrataÃÃo do cimento. Diante disso, buscou-se analisar como se dà o comportamento tÃrmico de concretos utilizados para a construÃÃo de corpo de barragem, alÃm de analisar como o tipo de cimento utilizado e o seu teor afetam a variaÃÃo de temperatura da massa de concreto e os problemas causados por essa variaÃÃo. Buscou-se ainda analisar a evoluÃÃo da resistÃncia à compressÃo e do mÃdulo de elasticidade dinÃmico à medida que o cimento se hidratava. Por fim, comparou-se o comportamento tÃrmico dos concretos produzidos com os resultados obtidos por meio de um software comercial. Para a realizaÃÃo da parte experimental produziu-se blocos de concretos de 1,5 metros cÃbicos com cimentos CP II-E 32 RS e CP IV 32 com consumo de 241,2 kg/m e 330,0 kg/m para anÃlise tÃrmica, alÃm da moldagem de corpos de prova cilÃndricos para as demais anÃlises. Os resultados apontaram que o comportamento tÃrmico do concreto apresenta uma pequena dependÃncia do tipo de cimento. Entretanto, o teor de cimento afeta fortemente esse comportamento, sendo o cimento CP IV 32 o que apresentou maiores variaÃÃes tÃrmicas. Observou-se tambÃm que a evoluÃÃo da resistÃncia à compressÃo à fortemente dependente da quantidade de cimento, mas apresenta baixa dependÃncia do tipo de cimento. A modelagem computacional apresentou resultados satisfatÃrios quando comparado aos resultados da evoluÃÃo tÃrmica dos blocos produzidos.CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16161application/pdfinfo:eu-repo/semantics/openAccessporreponame:Biblioteca Digital de Teses e Dissertações da UFCinstname:Universidade Federal do Cearáinstacron:UFC2019-01-21T11:29:33Zmail@mail.com -
dc.title.en.fl_str_mv Analysis of the behavior of concrete thermomechanical of low resistance in low ages
dc.title.alternative.pt.fl_str_mv AnÃlise do comportamento termo-mecÃnico de concretos de baixas resistÃncias em baixas idades
title Analysis of the behavior of concrete thermomechanical of low resistance in low ages
spellingShingle Analysis of the behavior of concrete thermomechanical of low resistance in low ages
Alexandre Jorge Rocha Menezes
Concreto
EvoluÃÃo tÃrmica
Calor de hidrataÃÃo
Modelagem computacional
Mass concrete
Thermal evolution
Heat of hydration
Computational modeling
CIMENTO
title_short Analysis of the behavior of concrete thermomechanical of low resistance in low ages
title_full Analysis of the behavior of concrete thermomechanical of low resistance in low ages
title_fullStr Analysis of the behavior of concrete thermomechanical of low resistance in low ages
title_full_unstemmed Analysis of the behavior of concrete thermomechanical of low resistance in low ages
title_sort Analysis of the behavior of concrete thermomechanical of low resistance in low ages
author Alexandre Jorge Rocha Menezes
author_facet Alexandre Jorge Rocha Menezes
author_role author
dc.contributor.advisor1.fl_str_mv Antonio Eduardo Bezerra Cabral
dc.contributor.advisor1ID.fl_str_mv 36365653387
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/6399451844691825
dc.contributor.referee1.fl_str_mv Jorge Barbosa Soares
dc.contributor.referee1ID.fl_str_mv 41441575391
dc.contributor.referee2.fl_str_mv Jorge Manuel CaliÃo Lopes de Brito
dc.contributor.authorID.fl_str_mv 01954460384
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/5478769910457442
dc.contributor.author.fl_str_mv Alexandre Jorge Rocha Menezes
contributor_str_mv Antonio Eduardo Bezerra Cabral
Jorge Barbosa Soares
Jorge Manuel CaliÃo Lopes de Brito
dc.subject.por.fl_str_mv Concreto
EvoluÃÃo tÃrmica
Calor de hidrataÃÃo
Modelagem computacional
topic Concreto
EvoluÃÃo tÃrmica
Calor de hidrataÃÃo
Modelagem computacional
Mass concrete
Thermal evolution
Heat of hydration
Computational modeling
CIMENTO
dc.subject.eng.fl_str_mv Mass concrete
Thermal evolution
Heat of hydration
Computational modeling
dc.subject.cnpq.fl_str_mv CIMENTO
dc.description.sponsorship.fl_txt_mv CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior
dc.description.abstract.por.fl_txt_mv Great works of infrastructure such as hydroelectric plants require, in it building, large concrete volumes classified as mass concrete structures. These works of power generation are strategic and fundamental for the development of a nation. However, during construction and throughout its life they may have pathological manifestations that compromise its stability. One of the most common problems in this type of structure is cracking caused by heat generated due to the exothermic reaction of cement hydration. Therefore, we had to analyze the thermal behavior of concrete, concrete with similar consistency and resistance like the concrete utilized in construction dam, and analyze how the type of cement utilized and its contents affects these parameters. In addition, we studied the evolution of compressive strength and dynamic modulus of elasticity as the cement hydrates. Finally, we compared the thermal performance of concretes produced with the results obtained from a commercial software. To carry out the experiment, concrete blocks were produced of 1,5m with cements CP II E 32 RS and CP IV 32 with consumption 241,2 kg/m and 330,0 kg/m for thermal analysis, besides cylindrical specimens for the remaining analyzes. The results showed that the thermal behavior of concrete has a small dependence on the type of cement, however the cement content affects too much this behavior, and the cement CP IV 32 showed higher thermal variations. It was also observed that the development of compressive strength is strongly dependent on the cement content, but it has low dependency on the type of cement. Computer modeling presented satisfactory results when it was compared to results of the thermal evolution blocks.
As grandes obras de infraestrutura como as centrais hidroelÃtricas requerem na sua construÃÃo grandes volumes de concreto, sendo classificadas como estruturas de concreto massa. Essas obras de geraÃÃo de energia sÃo estratÃgicas e fundamentais para o desenvolvimento de uma naÃÃo. Entretanto, durante sua construÃÃo e ao longo de sua vida Ãtil estas podem apresentar manifestaÃÃes patolÃgicas que comprometem sua estabilidade. Um dos problemas mais comuns nesse tipo de estrutura à a fissuraÃÃo causada pela energia tÃrmica gerada devido à reaÃÃo exotÃrmica de hidrataÃÃo do cimento. Diante disso, buscou-se analisar como se dà o comportamento tÃrmico de concretos utilizados para a construÃÃo de corpo de barragem, alÃm de analisar como o tipo de cimento utilizado e o seu teor afetam a variaÃÃo de temperatura da massa de concreto e os problemas causados por essa variaÃÃo. Buscou-se ainda analisar a evoluÃÃo da resistÃncia à compressÃo e do mÃdulo de elasticidade dinÃmico à medida que o cimento se hidratava. Por fim, comparou-se o comportamento tÃrmico dos concretos produzidos com os resultados obtidos por meio de um software comercial. Para a realizaÃÃo da parte experimental produziu-se blocos de concretos de 1,5 metros cÃbicos com cimentos CP II-E 32 RS e CP IV 32 com consumo de 241,2 kg/m e 330,0 kg/m para anÃlise tÃrmica, alÃm da moldagem de corpos de prova cilÃndricos para as demais anÃlises. Os resultados apontaram que o comportamento tÃrmico do concreto apresenta uma pequena dependÃncia do tipo de cimento. Entretanto, o teor de cimento afeta fortemente esse comportamento, sendo o cimento CP IV 32 o que apresentou maiores variaÃÃes tÃrmicas. Observou-se tambÃm que a evoluÃÃo da resistÃncia à compressÃo à fortemente dependente da quantidade de cimento, mas apresenta baixa dependÃncia do tipo de cimento. A modelagem computacional apresentou resultados satisfatÃrios quando comparado aos resultados da evoluÃÃo tÃrmica dos blocos produzidos.
description Great works of infrastructure such as hydroelectric plants require, in it building, large concrete volumes classified as mass concrete structures. These works of power generation are strategic and fundamental for the development of a nation. However, during construction and throughout its life they may have pathological manifestations that compromise its stability. One of the most common problems in this type of structure is cracking caused by heat generated due to the exothermic reaction of cement hydration. Therefore, we had to analyze the thermal behavior of concrete, concrete with similar consistency and resistance like the concrete utilized in construction dam, and analyze how the type of cement utilized and its contents affects these parameters. In addition, we studied the evolution of compressive strength and dynamic modulus of elasticity as the cement hydrates. Finally, we compared the thermal performance of concretes produced with the results obtained from a commercial software. To carry out the experiment, concrete blocks were produced of 1,5m with cements CP II E 32 RS and CP IV 32 with consumption 241,2 kg/m and 330,0 kg/m for thermal analysis, besides cylindrical specimens for the remaining analyzes. The results showed that the thermal behavior of concrete has a small dependence on the type of cement, however the cement content affects too much this behavior, and the cement CP IV 32 showed higher thermal variations. It was also observed that the development of compressive strength is strongly dependent on the cement content, but it has low dependency on the type of cement. Computer modeling presented satisfactory results when it was compared to results of the thermal evolution blocks.
publishDate 2015
dc.date.issued.fl_str_mv 2015-04-24
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
status_str publishedVersion
format masterThesis
dc.identifier.uri.fl_str_mv http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16161
url http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16161
dc.language.iso.fl_str_mv por
language por
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.publisher.none.fl_str_mv Universidade Federal do CearÃ
dc.publisher.program.fl_str_mv Programa de PÃs-GraduaÃÃo em Engenharia Civil Estruturas e ConstruÃÃo Civil
dc.publisher.initials.fl_str_mv UFC
dc.publisher.country.fl_str_mv BR
publisher.none.fl_str_mv Universidade Federal do CearÃ
dc.source.none.fl_str_mv reponame:Biblioteca Digital de Teses e Dissertações da UFC
instname:Universidade Federal do Ceará
instacron:UFC
reponame_str Biblioteca Digital de Teses e Dissertações da UFC
collection Biblioteca Digital de Teses e Dissertações da UFC
instname_str Universidade Federal do Ceará
instacron_str UFC
institution UFC
repository.name.fl_str_mv -
repository.mail.fl_str_mv mail@mail.com
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