Resistência à compressão dos concretos usados na região metropolitana do Recife: conformidade e análise estatística.
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações da UNICAP |
Texto Completo: | http://tede2.unicap.br:8080/handle/tede/1069 |
Resumo: | Compressive strength is the most important and desirable property of a concrete. In this way, problems of nonconformity in the values of the compressive strengths are configured in a reduction of the quality of the concrete, consequently in the reduction of its durability and useful life, besides a risk to the structural safety. The general objective of this research is to know, through quantitative data, the performance of concrete used in the construction of residential, commercial and business buildings built in the metropolitan region of the city of Recife (RMR). In addition, to classify individually the works by the concept of the Global Lot, that is to say, by the percentage of nonconformity of all its concretes; compare the compliances between machined concretes and "in loco"; verify the conformity and the annual evolution of the concretes by resistance classes; and to determine proper characteristics of the use of the concrete by the RMR works. A field research was used as methodology, where the 8 main RMR contractors authorized the supply of the results of resistance to compression at 28 days of some of their works, through a single laboratory of materials accredited to the Brazilian Network of Testing Laboratories (RBLE). A total of 235 complete works were analyzed, and 122,810 representative copies were processed in electronic spreadsheet, of which 1,308 were produced "locally" and 121,502 produced by 9 concrete plants, of which 8 were produced nationally. The percentage of total nonconformity of concretes was found in 20.21% for concrete in situ in 37.84% and for concretes machined in 20.02%. Of the 235 works, only 6 (2.6%) obtained their total percentage of non-conforming results of less than or equal to 5%, consequently, 229 works (97.4%) obtained total percentages of nonconforming results greater than 5% , of which, of these 229 works, 110 (46.8%) obtained total percentages of non-conforming results greater than 20%. It is concluded that the disregard with the dosing strength yields 1 nonconforming batch for every 20 batches evaluated, representing a quantity 400% greater than that determined by NBR 6118/2014. |
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Oliveira, Romilde Almeida de003.638.204-34http://lattes.cnpq.br/9272579827887449Silva, Ângelo Just da Costa e821.292.584-68http://lattes.cnpq.br/4870687041882933Vitório, José Afonso Pereirahttp://lattes.cnpq.br/0538745739600852Mota, João Manuel de Freitas998.249.904-10Aguiar, Roberto de Castro2019-03-22T17:52:12Z2018-04-02AGUIAR, Roberto de Castro. Resistência à compressão dos concretos usados na região metropolitana do Recife: conformidade e análise estatística. 2018. Dissertação (Mestrado) - Universidade Católica de Pernambuco. Programa de Pós-graduação em Engenharia Civil. Mestrado em Engenharia Civil, 2018.http://tede2.unicap.br:8080/handle/tede/1069Compressive strength is the most important and desirable property of a concrete. In this way, problems of nonconformity in the values of the compressive strengths are configured in a reduction of the quality of the concrete, consequently in the reduction of its durability and useful life, besides a risk to the structural safety. The general objective of this research is to know, through quantitative data, the performance of concrete used in the construction of residential, commercial and business buildings built in the metropolitan region of the city of Recife (RMR). In addition, to classify individually the works by the concept of the Global Lot, that is to say, by the percentage of nonconformity of all its concretes; compare the compliances between machined concretes and "in loco"; verify the conformity and the annual evolution of the concretes by resistance classes; and to determine proper characteristics of the use of the concrete by the RMR works. A field research was used as methodology, where the 8 main RMR contractors authorized the supply of the results of resistance to compression at 28 days of some of their works, through a single laboratory of materials accredited to the Brazilian Network of Testing Laboratories (RBLE). A total of 235 complete works were analyzed, and 122,810 representative copies were processed in electronic spreadsheet, of which 1,308 were produced "locally" and 121,502 produced by 9 concrete plants, of which 8 were produced nationally. The percentage of total nonconformity of concretes was found in 20.21% for concrete in situ in 37.84% and for concretes machined in 20.02%. Of the 235 works, only 6 (2.6%) obtained their total percentage of non-conforming results of less than or equal to 5%, consequently, 229 works (97.4%) obtained total percentages of nonconforming results greater than 5% , of which, of these 229 works, 110 (46.8%) obtained total percentages of non-conforming results greater than 20%. It is concluded that the disregard with the dosing strength yields 1 nonconforming batch for every 20 batches evaluated, representing a quantity 400% greater than that determined by NBR 6118/2014.A resistência à compressão é a mais importante e desejável propriedade de um concreto. Desta forma, problemas de não-conformidade nos valores das resistências à compressão se configuram em diminuição da qualidade do concreto, consequentemente na redução da sua durabilidade e vida útil, além de um risco à segurança estrutural. O objetivo geral dessa pesquisa é conhecer, através de dados quantitativos, o desempenho dos concretos utilizados nas obras de edifícios residenciais, comerciais e empresariais construídos na região metropolitana da cidade do Recife (RMR). Ademais, classificar individualmente as obras pelo conceito do Lote Global, ou seja, pelo percentual de não-conformidade de todos os seus concretos; comparar as conformidades entre concretos usinados e “in loco”; verificar a conformidade e a evolução anual dos concretos por classes de resistências; e apurar características próprias do uso do concreto pelas obras da RMR. Adotou-se como metodologia uma pesquisa de campo, onde as 8 principais construtoras da RMR autorizaram o fornecimento dos resultados de resistência à compressão aos 28 dias de algumas de suas obras, através de um único laboratório de materiais credenciado à Rede Brasileira de Laboratórios de Ensaios (RBLE). Ao todo foram analisadas 235 obras completas, e tratados em planilha eletrônica 122.810 exemplares representativos, sendo 1.308 produzidos “in loco” e 121.502 produzidos por 9 concreteiras, das quais 8 delas com atuação nacional. Encontrou-se o percentual de não-conformidade total dos concretos em 20,21%, para concretos “in loco” em 37,84%, e para concretos usinados em 20,02%. Das 235 obras, apenas 6 (2,6%) obtiveram seus percentuais totais de resultados não-conforme menores ou iguais a 5%, consequentemente, 229 obras (97,4%) obtiveram percentuais totais de resultados não-conformes maiores a 5%, sendo que, dessas 229 obras, 110 (46,8%) obtiveram percentuais totais de resultados não-conforme maiores a 20%. Conclui-se que o descaso com a resistência de dosagem produz 1 lote não-conforme a cada 20 lotes avaliados, o que representa uma quantidade 400% maior do que a determinada pela NBR 6118/2014.Submitted by Biblioteca Central (biblioteca@unicap.br) on 2019-03-22T17:52:12Z No. of bitstreams: 2 roberto_castro_aguiar.pdf: 1787936 bytes, checksum: a1e428ffdd841303f50f9ec402c66173 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Made available in DSpace on 2019-03-22T17:52:12Z (GMT). No. of bitstreams: 2 roberto_castro_aguiar.pdf: 1787936 bytes, checksum: a1e428ffdd841303f50f9ec402c66173 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2018-04-02Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESapplication/pdfporUniversidade Católica de PernambucoMestrado em Engenharia CivilUNICAPBrasilDepartamento de Pós-Graduaçãohttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessConcreto - testesResistência de materiaisAnálise estatísticaDissertaçõesDissertationsConcrete - testsResistance of materialsStatistical analysisENGENHARIAS::ENGENHARIA CIVILResistência à compressão dos concretos usados na região metropolitana do Recife: conformidade e análise estatística.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-7802886533828766338500500600600-8854052368273140835-62748332150463957722075167498588264571reponame:Biblioteca Digital de Teses e Dissertações da UNICAPinstname:Universidade Católica de Pernambuco (UNICAP)instacron:UNICAPORIGINALroberto_castro_aguiar.pdfroberto_castro_aguiar.pdfapplication/pdf1787936http://tede2.unicap.br:8080/handle/tede/bitstream/tede/1069/5/roberto_castro_aguiar.pdfa1e428ffdd841303f50f9ec402c66173MD55CC-LICENSElicense_urllicense_urltext/plain; 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dc.title.por.fl_str_mv |
Resistência à compressão dos concretos usados na região metropolitana do Recife: conformidade e análise estatística. |
title |
Resistência à compressão dos concretos usados na região metropolitana do Recife: conformidade e análise estatística. |
spellingShingle |
Resistência à compressão dos concretos usados na região metropolitana do Recife: conformidade e análise estatística. Aguiar, Roberto de Castro Concreto - testes Resistência de materiais Análise estatística Dissertações Dissertations Concrete - tests Resistance of materials Statistical analysis ENGENHARIAS::ENGENHARIA CIVIL |
title_short |
Resistência à compressão dos concretos usados na região metropolitana do Recife: conformidade e análise estatística. |
title_full |
Resistência à compressão dos concretos usados na região metropolitana do Recife: conformidade e análise estatística. |
title_fullStr |
Resistência à compressão dos concretos usados na região metropolitana do Recife: conformidade e análise estatística. |
title_full_unstemmed |
Resistência à compressão dos concretos usados na região metropolitana do Recife: conformidade e análise estatística. |
title_sort |
Resistência à compressão dos concretos usados na região metropolitana do Recife: conformidade e análise estatística. |
author |
Aguiar, Roberto de Castro |
author_facet |
Aguiar, Roberto de Castro |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Oliveira, Romilde Almeida de |
dc.contributor.advisor1ID.fl_str_mv |
003.638.204-34 |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/9272579827887449 |
dc.contributor.referee1.fl_str_mv |
Silva, Ângelo Just da Costa e |
dc.contributor.referee1ID.fl_str_mv |
821.292.584-68 |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/4870687041882933 |
dc.contributor.referee2.fl_str_mv |
Vitório, José Afonso Pereira |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/0538745739600852 |
dc.contributor.referee3.fl_str_mv |
Mota, João Manuel de Freitas |
dc.contributor.authorID.fl_str_mv |
998.249.904-10 |
dc.contributor.author.fl_str_mv |
Aguiar, Roberto de Castro |
contributor_str_mv |
Oliveira, Romilde Almeida de Silva, Ângelo Just da Costa e Vitório, José Afonso Pereira Mota, João Manuel de Freitas |
dc.subject.por.fl_str_mv |
Concreto - testes Resistência de materiais Análise estatística Dissertações |
topic |
Concreto - testes Resistência de materiais Análise estatística Dissertações Dissertations Concrete - tests Resistance of materials Statistical analysis ENGENHARIAS::ENGENHARIA CIVIL |
dc.subject.eng.fl_str_mv |
Dissertations Concrete - tests Resistance of materials Statistical analysis |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA CIVIL |
description |
Compressive strength is the most important and desirable property of a concrete. In this way, problems of nonconformity in the values of the compressive strengths are configured in a reduction of the quality of the concrete, consequently in the reduction of its durability and useful life, besides a risk to the structural safety. The general objective of this research is to know, through quantitative data, the performance of concrete used in the construction of residential, commercial and business buildings built in the metropolitan region of the city of Recife (RMR). In addition, to classify individually the works by the concept of the Global Lot, that is to say, by the percentage of nonconformity of all its concretes; compare the compliances between machined concretes and "in loco"; verify the conformity and the annual evolution of the concretes by resistance classes; and to determine proper characteristics of the use of the concrete by the RMR works. A field research was used as methodology, where the 8 main RMR contractors authorized the supply of the results of resistance to compression at 28 days of some of their works, through a single laboratory of materials accredited to the Brazilian Network of Testing Laboratories (RBLE). A total of 235 complete works were analyzed, and 122,810 representative copies were processed in electronic spreadsheet, of which 1,308 were produced "locally" and 121,502 produced by 9 concrete plants, of which 8 were produced nationally. The percentage of total nonconformity of concretes was found in 20.21% for concrete in situ in 37.84% and for concretes machined in 20.02%. Of the 235 works, only 6 (2.6%) obtained their total percentage of non-conforming results of less than or equal to 5%, consequently, 229 works (97.4%) obtained total percentages of nonconforming results greater than 5% , of which, of these 229 works, 110 (46.8%) obtained total percentages of non-conforming results greater than 20%. It is concluded that the disregard with the dosing strength yields 1 nonconforming batch for every 20 batches evaluated, representing a quantity 400% greater than that determined by NBR 6118/2014. |
publishDate |
2018 |
dc.date.issued.fl_str_mv |
2018-04-02 |
dc.date.accessioned.fl_str_mv |
2019-03-22T17:52:12Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
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masterThesis |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
AGUIAR, Roberto de Castro. Resistência à compressão dos concretos usados na região metropolitana do Recife: conformidade e análise estatística. 2018. Dissertação (Mestrado) - Universidade Católica de Pernambuco. Programa de Pós-graduação em Engenharia Civil. Mestrado em Engenharia Civil, 2018. |
dc.identifier.uri.fl_str_mv |
http://tede2.unicap.br:8080/handle/tede/1069 |
identifier_str_mv |
AGUIAR, Roberto de Castro. Resistência à compressão dos concretos usados na região metropolitana do Recife: conformidade e análise estatística. 2018. Dissertação (Mestrado) - Universidade Católica de Pernambuco. Programa de Pós-graduação em Engenharia Civil. Mestrado em Engenharia Civil, 2018. |
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Universidade Católica de Pernambuco |
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