Determina??o da ecoefici?ncia de concretos reciclados em fun??o do consumo de ligantes
Ano de defesa: | 2020 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Estadual de Feira de Santana
|
Programa de Pós-Graduação: |
Mestrado em Engenharia Civil e Ambiental
|
Departamento: |
DEPARTAMENTO DE TECNOLOGIA
|
País: |
Brasil
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://tede2.uefs.br:8080/handle/tede/1226 |
Resumo: | The cement industry CO2 emissions represent about 7 % of total greenhouse gases emissions worldwide. Cement production is expected to increase by 12 ? 23 % above the level of 2014 until 2050, and traditional strategies to mitigate such emissions focusing on cement production will not be able to compensate for this growth. Thus, new alternatives must be developed, which includes increasing the efficiency of cement consumption in concretes. The use of recycled aggregates from CDW as a substitute for natural aggregates generally increases the cement content in recycled concrete (RC) to obtain the same performance. This fact can compromise the principle of sustainability in the use of this residue. Thus, this study aims to establish an overview of the binder?s consumption of RC, whose data are available in the literature, and to measure the efficiency of these mixtures through the Binder Intensity (bi) and CO2 Intensity (ci). In addition, the study aims to establish benchmarks and guidelines that can contribute to increasing ecoefficiency in the RC binder?s consumption. In general, RC show high cement consumption with an increase in compressive strength at 28 days. The lowest values of bi observed range from 6 to 7 kg.m-3.MPa-1, which occurs for RC with strengths above 50 MPa, and the lowest values of ci range from 2 to 4 kg.m-3. MPa-1, for strengths less than 50 MPa and mixtures that use cements with low clinker contents. Such bi and ci ranges reveal significant potential for RC gains reducing CO2 emissions within the RC chain, since the vast majority of bi and ci results are above the upper limit of these ranges. Based on the panorama, a bi ? 7 kg.m-3.MPa-1 and a ci ? 5 kg.m-3.MPa-1 are identified as possible benchmarks for RC. Some of the main guidelines drawn were: to reduce the w/b ratio of RC, limiting the binder's consumption; to use mineral additions, preferably the active ones; improve the dispersion and the particle packaging; to use high-strength Portland cements, limiting the clinker-factor. |
id |
UEFS_356bbb6f502ce38f70793ee87fd436dc |
---|---|
oai_identifier_str |
oai:tede2.uefs.br:8080:tede/1226 |
network_acronym_str |
UEFS |
network_name_str |
Biblioteca Digital de Teses e Dissertações da UEFS |
repository_id_str |
|
spelling |
Leite, M?nica Batista05201153500http://lattes.cnpq.br/1756738147587892Machado, Lais Sampaio2021-03-17T21:58:18Z2020-11-18MACHADO, Lais Sampaio. Determina??o da ecoefici?ncia de concretos reciclados em fun??o do consumo de ligantes. 2020. 168 f. Disserta??o (Mestrado em Engenharia Civil e Ambiental)- Universidade Estadual de Feira de Santana, Feira de Santana, 2020.http://tede2.uefs.br:8080/handle/tede/1226The cement industry CO2 emissions represent about 7 % of total greenhouse gases emissions worldwide. Cement production is expected to increase by 12 ? 23 % above the level of 2014 until 2050, and traditional strategies to mitigate such emissions focusing on cement production will not be able to compensate for this growth. Thus, new alternatives must be developed, which includes increasing the efficiency of cement consumption in concretes. The use of recycled aggregates from CDW as a substitute for natural aggregates generally increases the cement content in recycled concrete (RC) to obtain the same performance. This fact can compromise the principle of sustainability in the use of this residue. Thus, this study aims to establish an overview of the binder?s consumption of RC, whose data are available in the literature, and to measure the efficiency of these mixtures through the Binder Intensity (bi) and CO2 Intensity (ci). In addition, the study aims to establish benchmarks and guidelines that can contribute to increasing ecoefficiency in the RC binder?s consumption. In general, RC show high cement consumption with an increase in compressive strength at 28 days. The lowest values of bi observed range from 6 to 7 kg.m-3.MPa-1, which occurs for RC with strengths above 50 MPa, and the lowest values of ci range from 2 to 4 kg.m-3. MPa-1, for strengths less than 50 MPa and mixtures that use cements with low clinker contents. Such bi and ci ranges reveal significant potential for RC gains reducing CO2 emissions within the RC chain, since the vast majority of bi and ci results are above the upper limit of these ranges. Based on the panorama, a bi ? 7 kg.m-3.MPa-1 and a ci ? 5 kg.m-3.MPa-1 are identified as possible benchmarks for RC. Some of the main guidelines drawn were: to reduce the w/b ratio of RC, limiting the binder's consumption; to use mineral additions, preferably the active ones; improve the dispersion and the particle packaging; to use high-strength Portland cements, limiting the clinker-factor.As emiss?es de CO2 da ind?stria do cimento representam cerca de 7 % das emiss?es totais geradas pelo homem em todo mundo. A produ??o do cimento dever? aumentar de 12 - 23 % acima do n?vel de 2014 at? 2050, e as estrat?gias tradicionais para mitigar tais emiss?es, com foco na produ??o de cimento, n?o ser?o capazes de compensar esse crescimento. Dessa forma, novas alternativas devem ser desenvolvidas, o que inclui aumentar a efici?ncia do consumo de cimento nos concretos. O uso de agregados reciclados de RCD como substituto dos agregados naturais geralmente aumenta o consumo de cimento no concreto reciclado (CR), para se obter um mesmo desempenho. Tal fato pode comprometer o princ?pio da sustentabilidade do uso desse res?duo. Assim, esse estudo tem como objetivo estabelecer um panorama do consumo de ligantes dos CR, cujos dados est?o dispon?veis na literatura, e medir a efici?ncia dessas misturas por meio da Intensidade de Ligantes (IL) e Intensidade de CO2 (IC). Al?m disso, o estudo visa estabelecer metas e diretrizes que possam contribuir com o aumento da ecoefici?ncia no consumo de ligantes dos CR. Em geral, os CR apresentam elevados consumos de cimento com o aumento da resist?ncia ? compress?o, aos 28 dias. Os menores valores de IL observados variam de 6 a 7 kg.m-3.MPa-1, o que ocorre para CR com resist?ncias acima de 50 MPa, e os menores valores de IC variam de 2 a 4 kg.m-3.MPa-1, para resist?ncias menores que 50 MPa, e misturas que utilizam cimentos com baixos teores de cl?nquer. Tais faixas de IL e IC revelam um potencial significativo para ganhos de desempenho, que podem conduzir a uma redu??o das emiss?es de CO2 dentro da cadeia do CR, uma vez que a grande maioria resultados de IL e IC est?o muito acima do limite superior dessas faixas de valores. A partir do panorama estabelecido s?o apontados como metas poss?veis de serem alcan?adas nos CR um valor de IL ? 7 kg.m-3.MPa-1 e um valor de IC ? 5 kg.m- 3.MPa-1. Para isso, de uma maneira geral, ? necess?rio reduzir a rela??o a/c dos CR, limitando o consumo de ligantes, utilizar adi??es minerais, de prefer?ncia ativas, melhorar a dispers?o e empacotamento das part?culas, utilizar cimentos de elevada resist?ncia e com baixo fator cl?nquer, foram algumas das diretrizes estabelecidas.Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2021-03-17T21:58:18Z No. of bitstreams: 1 DISSERTACAO_LAIS_SAMPAIO_18_11_2020.pdf: 2897407 bytes, checksum: 45c99de10f59330d45d362188277c986 (MD5)Made available in DSpace on 2021-03-17T21:58:18Z (GMT). No. of bitstreams: 1 DISSERTACAO_LAIS_SAMPAIO_18_11_2020.pdf: 2897407 bytes, checksum: 45c99de10f59330d45d362188277c986 (MD5) Previous issue date: 2020-11-18application/pdfporUniversidade Estadual de Feira de SantanaMestrado em Engenharia Civil e AmbientalUEFSBrasilDEPARTAMENTO DE TECNOLOGIAConcretos recicladosIntensidade de ligantesIntensidade de CO2DosagemEcoefici?nciaSustentabilidadeRecycled concreteBinder intensityCO2 intensityMixture proportioningEfficiencySustainabilityENGENHARIAS::ENGENHARIA CIVILDetermina??o da ecoefici?ncia de concretos reciclados em fun??o do consumo de ligantesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-19309366784521606426006006004335108523020347051-6274833215046395772info:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UEFSinstname:Universidade Estadual de Feira de Santana (UEFS)instacron:UEFSORIGINALDISSERTACAO_LAIS_SAMPAIO_18_11_2020.pdfDISSERTACAO_LAIS_SAMPAIO_18_11_2020.pdfapplication/pdf2897407http://tede2.uefs.br:8080/bitstream/tede/1226/2/DISSERTACAO_LAIS_SAMPAIO_18_11_2020.pdf45c99de10f59330d45d362188277c986MD52LICENSElicense.txtlicense.txttext/plain; charset=utf-82089http://tede2.uefs.br:8080/bitstream/tede/1226/1/license.txt7b5ba3d2445355f386edab96125d42b7MD51tede/12262021-03-17 18:58:18.799oai:tede2.uefs.br:8080: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Biblioteca Digital de Teses e Dissertaçõeshttp://tede2.uefs.br:8080/PUBhttp://tede2.uefs.br:8080/oai/requestbcuefs@uefs.br|| bcref@uefs.br||bcuefs@uefs.bropendoar:2021-03-17T21:58:18Biblioteca Digital de Teses e Dissertações da UEFS - Universidade Estadual de Feira de Santana (UEFS)false |
dc.title.por.fl_str_mv |
Determina??o da ecoefici?ncia de concretos reciclados em fun??o do consumo de ligantes |
title |
Determina??o da ecoefici?ncia de concretos reciclados em fun??o do consumo de ligantes |
spellingShingle |
Determina??o da ecoefici?ncia de concretos reciclados em fun??o do consumo de ligantes Machado, Lais Sampaio Concretos reciclados Intensidade de ligantes Intensidade de CO2 Dosagem Ecoefici?ncia Sustentabilidade Recycled concrete Binder intensity CO2 intensity Mixture proportioning Efficiency Sustainability ENGENHARIAS::ENGENHARIA CIVIL |
title_short |
Determina??o da ecoefici?ncia de concretos reciclados em fun??o do consumo de ligantes |
title_full |
Determina??o da ecoefici?ncia de concretos reciclados em fun??o do consumo de ligantes |
title_fullStr |
Determina??o da ecoefici?ncia de concretos reciclados em fun??o do consumo de ligantes |
title_full_unstemmed |
Determina??o da ecoefici?ncia de concretos reciclados em fun??o do consumo de ligantes |
title_sort |
Determina??o da ecoefici?ncia de concretos reciclados em fun??o do consumo de ligantes |
author |
Machado, Lais Sampaio |
author_facet |
Machado, Lais Sampaio |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Leite, M?nica Batista |
dc.contributor.authorID.fl_str_mv |
05201153500 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/1756738147587892 |
dc.contributor.author.fl_str_mv |
Machado, Lais Sampaio |
contributor_str_mv |
Leite, M?nica Batista |
dc.subject.por.fl_str_mv |
Concretos reciclados Intensidade de ligantes Intensidade de CO2 Dosagem Ecoefici?ncia Sustentabilidade |
topic |
Concretos reciclados Intensidade de ligantes Intensidade de CO2 Dosagem Ecoefici?ncia Sustentabilidade Recycled concrete Binder intensity CO2 intensity Mixture proportioning Efficiency Sustainability ENGENHARIAS::ENGENHARIA CIVIL |
dc.subject.eng.fl_str_mv |
Recycled concrete Binder intensity CO2 intensity Mixture proportioning Efficiency Sustainability |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA CIVIL |
description |
The cement industry CO2 emissions represent about 7 % of total greenhouse gases emissions worldwide. Cement production is expected to increase by 12 ? 23 % above the level of 2014 until 2050, and traditional strategies to mitigate such emissions focusing on cement production will not be able to compensate for this growth. Thus, new alternatives must be developed, which includes increasing the efficiency of cement consumption in concretes. The use of recycled aggregates from CDW as a substitute for natural aggregates generally increases the cement content in recycled concrete (RC) to obtain the same performance. This fact can compromise the principle of sustainability in the use of this residue. Thus, this study aims to establish an overview of the binder?s consumption of RC, whose data are available in the literature, and to measure the efficiency of these mixtures through the Binder Intensity (bi) and CO2 Intensity (ci). In addition, the study aims to establish benchmarks and guidelines that can contribute to increasing ecoefficiency in the RC binder?s consumption. In general, RC show high cement consumption with an increase in compressive strength at 28 days. The lowest values of bi observed range from 6 to 7 kg.m-3.MPa-1, which occurs for RC with strengths above 50 MPa, and the lowest values of ci range from 2 to 4 kg.m-3. MPa-1, for strengths less than 50 MPa and mixtures that use cements with low clinker contents. Such bi and ci ranges reveal significant potential for RC gains reducing CO2 emissions within the RC chain, since the vast majority of bi and ci results are above the upper limit of these ranges. Based on the panorama, a bi ? 7 kg.m-3.MPa-1 and a ci ? 5 kg.m-3.MPa-1 are identified as possible benchmarks for RC. Some of the main guidelines drawn were: to reduce the w/b ratio of RC, limiting the binder's consumption; to use mineral additions, preferably the active ones; improve the dispersion and the particle packaging; to use high-strength Portland cements, limiting the clinker-factor. |
publishDate |
2020 |
dc.date.issued.fl_str_mv |
2020-11-18 |
dc.date.accessioned.fl_str_mv |
2021-03-17T21:58:18Z |
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.citation.fl_str_mv |
MACHADO, Lais Sampaio. Determina??o da ecoefici?ncia de concretos reciclados em fun??o do consumo de ligantes. 2020. 168 f. Disserta??o (Mestrado em Engenharia Civil e Ambiental)- Universidade Estadual de Feira de Santana, Feira de Santana, 2020. |
dc.identifier.uri.fl_str_mv |
http://tede2.uefs.br:8080/handle/tede/1226 |
identifier_str_mv |
MACHADO, Lais Sampaio. Determina??o da ecoefici?ncia de concretos reciclados em fun??o do consumo de ligantes. 2020. 168 f. Disserta??o (Mestrado em Engenharia Civil e Ambiental)- Universidade Estadual de Feira de Santana, Feira de Santana, 2020. |
url |
http://tede2.uefs.br:8080/handle/tede/1226 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.program.fl_str_mv |
-1930936678452160642 |
dc.relation.confidence.fl_str_mv |
600 600 600 |
dc.relation.department.fl_str_mv |
4335108523020347051 |
dc.relation.cnpq.fl_str_mv |
-6274833215046395772 |
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 Estadual de Feira de Santana |
dc.publisher.program.fl_str_mv |
Mestrado em Engenharia Civil e Ambiental |
dc.publisher.initials.fl_str_mv |
UEFS |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
DEPARTAMENTO DE TECNOLOGIA |
publisher.none.fl_str_mv |
Universidade Estadual de Feira de Santana |
dc.source.none.fl_str_mv |
reponame:Biblioteca Digital de Teses e Dissertações da UEFS instname:Universidade Estadual de Feira de Santana (UEFS) instacron:UEFS |
instname_str |
Universidade Estadual de Feira de Santana (UEFS) |
instacron_str |
UEFS |
institution |
UEFS |
reponame_str |
Biblioteca Digital de Teses e Dissertações da UEFS |
collection |
Biblioteca Digital de Teses e Dissertações da UEFS |
bitstream.url.fl_str_mv |
http://tede2.uefs.br:8080/bitstream/tede/1226/2/DISSERTACAO_LAIS_SAMPAIO_18_11_2020.pdf http://tede2.uefs.br:8080/bitstream/tede/1226/1/license.txt |
bitstream.checksum.fl_str_mv |
45c99de10f59330d45d362188277c986 7b5ba3d2445355f386edab96125d42b7 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 |
repository.name.fl_str_mv |
Biblioteca Digital de Teses e Dissertações da UEFS - Universidade Estadual de Feira de Santana (UEFS) |
repository.mail.fl_str_mv |
bcuefs@uefs.br|| bcref@uefs.br||bcuefs@uefs.br |
_version_ |
1796793643115216896 |