Redução da resistência de geogrelhas devido a danos químicos causados por resíduos de construção e demolição reciclados
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFG |
Texto Completo: | http://repositorio.bc.ufg.br/tede/handle/tede/10082 |
Resumo: | The growth of construction generates an increasing volume of construction and demolition waste (CDW) in the urban environment. Recent studies have shown the feasibility of using these materials in reinforced soil structures (RSS) with geosynthetics. In this context, most of these studies focused on investigations of the performance and mechanical damage suffered by geosynthetics during installation. However, chemical and environmental damage to geogrids from contact with the recycled construction and demolition waste (RCDW) over time is also important information for the design of these structures. Therefore, the main objective of this work was to evaluate the reduction of geogrid tensile strength due to chemical damage caused by RCDW when exposed to damage and different saturation scenarios. Characterization tests were performed on RCDW samples collected from a recycling plant. In-field test facilities were constructed to allow two types of geogrid (PET and PVA) being in contact with RCDW under three saturation conditions (dry, saturated and exposed to rain). Geogrid specimens were exhumed at two moments (1st and 2nd exhumations) to verify the occurrence and intensification of damage using SEM, EDX and tensile strength tests. During the exhumations, samples of RCDW and water were collected to geotechnical and chemical tests, respectively. Given the geotechnical focus of this study, tests commonly used for soil characterization were performed. Other tests were carried out to observe the chemical and composition characteristics of RCDW (pH and gravimetric composition). The results of the RCDW characterization showed characteristics very similar to those of granular soils, low variability of geotechnical parameters and alkaline characteristics. The SEM results showed the impregnation of RCDW on the geogrids. However, it was not possible to identify such aggregations by morphological analysis and EDX. Chemical analyzes in the liquids extracted from the in-field test facility during the exhumations processes indicated that RCDW could be classified as non-inert material. The tensile test results showed that PET geogrids presented a greater reduction of strength when exposed to the rainwater contact. Other parameters (strain and strength at 2% strain) were influenced differently. The results of PVA geogrids (2nd exhumation) showed that only the damaged samples in contact with rainwater showed no strength reduction. Regarding to other parameters evaluated of PVA geogrid, it was observed that the presence and type of water caused diverse changes. It is possible to conclude that the contact with water was the most significant factor in the geogrid strength changes when in contact with RCDW, with the effects being intensified on the damaged samples. However, the reduction factors observed could be implemented to designing RSS using RCDW and geosynthetics, thus demonstrating that RCDW could be employed as a friendly environmental backfill material. |
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Santos, Eder Carlos Guedes doshttp://lattes.cnpq.br/7017825980724888Santos, Eder Carlos Guedes dosMascarenha, Marcia Maria dos AnjosÂngulo, Sérgio Cirellihttp://lattes.cnpq.br/3102444140277522Silvestre, Gabriel Ribeiro2019-10-09T15:02:05Z2019-08-22SILVESTRE, G. R. Redução da resistência de geogrelhas devido a danos químicos causados por resíduos de construção e demolição reciclados. 2019. 147 f. Dissertação (Mestrado em Geotecnia, Estruturas e Construção Civil) - Universidade Federal de Goiás, Goiânia, 2019.http://repositorio.bc.ufg.br/tede/handle/tede/10082ark:/38995/00130000087qkThe growth of construction generates an increasing volume of construction and demolition waste (CDW) in the urban environment. Recent studies have shown the feasibility of using these materials in reinforced soil structures (RSS) with geosynthetics. In this context, most of these studies focused on investigations of the performance and mechanical damage suffered by geosynthetics during installation. However, chemical and environmental damage to geogrids from contact with the recycled construction and demolition waste (RCDW) over time is also important information for the design of these structures. Therefore, the main objective of this work was to evaluate the reduction of geogrid tensile strength due to chemical damage caused by RCDW when exposed to damage and different saturation scenarios. Characterization tests were performed on RCDW samples collected from a recycling plant. In-field test facilities were constructed to allow two types of geogrid (PET and PVA) being in contact with RCDW under three saturation conditions (dry, saturated and exposed to rain). Geogrid specimens were exhumed at two moments (1st and 2nd exhumations) to verify the occurrence and intensification of damage using SEM, EDX and tensile strength tests. During the exhumations, samples of RCDW and water were collected to geotechnical and chemical tests, respectively. Given the geotechnical focus of this study, tests commonly used for soil characterization were performed. Other tests were carried out to observe the chemical and composition characteristics of RCDW (pH and gravimetric composition). The results of the RCDW characterization showed characteristics very similar to those of granular soils, low variability of geotechnical parameters and alkaline characteristics. The SEM results showed the impregnation of RCDW on the geogrids. However, it was not possible to identify such aggregations by morphological analysis and EDX. Chemical analyzes in the liquids extracted from the in-field test facility during the exhumations processes indicated that RCDW could be classified as non-inert material. The tensile test results showed that PET geogrids presented a greater reduction of strength when exposed to the rainwater contact. Other parameters (strain and strength at 2% strain) were influenced differently. The results of PVA geogrids (2nd exhumation) showed that only the damaged samples in contact with rainwater showed no strength reduction. Regarding to other parameters evaluated of PVA geogrid, it was observed that the presence and type of water caused diverse changes. It is possible to conclude that the contact with water was the most significant factor in the geogrid strength changes when in contact with RCDW, with the effects being intensified on the damaged samples. However, the reduction factors observed could be implemented to designing RSS using RCDW and geosynthetics, thus demonstrating that RCDW could be employed as a friendly environmental backfill material.O crescimento da construção civil gera um volume cada vez maior de resíduos de construção e demolição (RCD) no ambiente urbano. Estudos recentes vêm mostrando a viabilidade de utilizar esses materiais em estruturas de solo reforçado (ESR) com geossintéticos. Nesse contexto, grande parte desses estudos concentraram-se em investigações dos desempenhos e dos danos mecânicos sofridos pela instalação dos geossintéticos. No entanto, os danos químicos e ambientais nas geogrelhas decorrentes do seu contato com o resíduo de construção e demolição reciclados (RCD-R) ao longo do tempo também são importantes informações para o dimensionamento dessas estruturas. Diante disso, o principal objetivo deste trabalho consistiu em avaliar a redução da resistência de geogrelhas devido a danos químicos causados por RCD-R quando expostas à danificação e a diferentes cenários de saturação. Para tanto, foram realizados ensaios de caracterização em amostras de RCD-R coletadas numa usina de reciclagem. Experimentos de campo foram construídos com propósito de deixar dois tipos de geogrelha (PET e PVA) em contato com o RCD-R sob três condições de saturação (seca, inundada e exposta à chuva). Corpos de prova das geogrelhas foram exumados em dois momentos (1ª e 2ª exumação), de modo a verificar a ocorrência e intensificação de danos por meio de ensaios de MEV, EDX e resistência à tração. Nas ocasiões de realização das exumações, foram coletas amostras de RCD-R (para caracterização) e de água (para ensaios químicos). Diante do enfoque geotécnico do estudo, foram realizados os ensaios comumente empregados para a caracterização de solos. Outros ensaios foram feitos para observar as características químicas e de composição do RCD-R (pH e composição gravimétrica). Os resultados da caracterização dos RCD-R mostraram que esses materiais possuem características próximas às de solos granulares, baixa variabilidade dos parâmetros geotécnicos e extratos aquosos com características alcalinas. Verificou-se, por meio do MEV, a impregnação de RCD-R nas geogrelhas; porém, não foi possível identificar tais agregações por análise morfológica e EDX. As análises químicas nos líquidos extraídos dos tanques, nas exumações, indicaram que esse RCD-R poderia ser classificado como não inerte. Os resultados dos ensaios resistência à tração mostraram que as geogrelhas de PET apresentaram uma maior redução de resistência quando submetidas à presença da água de chuva, tendo outros parâmetros (deformação e força a 2% de deformação) sido influenciados de maneira distinta. Os resultados das geogrelhas de PVA (2ª exumação) mostraram que apenas a amostra danificada e em contato de água da chuva não apresentou redução de resistência. Em relação aos outros parâmetros dessa geogrelha, observou-se que a presença e o tipo de água causaram alterações diversas. Conclui-se que a presença de água foi o fator mais expressivo na mudança de resistência das geogrelhas quando em contato com o RCD-R, com o efeito de tal fator sido intensificado nas amostras danificadas. Contudo, os fatores de redução observados poderiam ser implementados na fase de projeto de ESR com geossintéticos, demonstrando, assim, que RCD-R poderia ser empregado como um material de preenchimento ambientalmente correto.Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2019-10-08T12:34:04Z No. of bitstreams: 2 Dissertação - Gabriel Ribeiro Silvestre - 2019.pdf: 10869444 bytes, checksum: 6a9048a2d17c742ecccff5099a5d5ff3 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2019-10-09T15:02:05Z (GMT) No. of bitstreams: 2 Dissertação - Gabriel Ribeiro Silvestre - 2019.pdf: 10869444 bytes, checksum: 6a9048a2d17c742ecccff5099a5d5ff3 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Made available in DSpace on 2019-10-09T15:02:05Z (GMT). No. of bitstreams: 2 Dissertação - Gabriel Ribeiro Silvestre - 2019.pdf: 10869444 bytes, checksum: 6a9048a2d17c742ecccff5099a5d5ff3 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2019-08-22Fundação de Amparo à Pesquisa do Estado de Goiás - FAPEGapplication/pdfporUniversidade Federal de GoiásPrograma de Pós-graduação em Geotecnia, Estruturas e Construção Civil (EEC)UFGBrasilEscola de Engenharia Civil e Ambiental - EECA (RG)http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessRCD-RGeogrelhaDano químicoCondição de saturaçãoResistência à traçãoRCDWGeogridChemical damageSaturation conditionTensile strengthENGENHARIA CIVIL::GEOTECNICARedução da resistência de geogrelhas devido a danos químicos causados por resíduos de construção e demolição recicladosStrength reduction of geogrid due to chemical damage caused by recycled construction and demolition wasteinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis6915322422128222104600600600600-30084469377673019748794820169253231856-961409807440757778reponame:Repositório Institucional da UFGinstname:Universidade Federal de Goiás (UFG)instacron:UFGLICENSElicense.txtlicense.txttext/plain; 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dc.title.eng.fl_str_mv |
Redução da resistência de geogrelhas devido a danos químicos causados por resíduos de construção e demolição reciclados |
dc.title.alternative.eng.fl_str_mv |
Strength reduction of geogrid due to chemical damage caused by recycled construction and demolition waste |
title |
Redução da resistência de geogrelhas devido a danos químicos causados por resíduos de construção e demolição reciclados |
spellingShingle |
Redução da resistência de geogrelhas devido a danos químicos causados por resíduos de construção e demolição reciclados Silvestre, Gabriel Ribeiro RCD-R Geogrelha Dano químico Condição de saturação Resistência à tração RCDW Geogrid Chemical damage Saturation condition Tensile strength ENGENHARIA CIVIL::GEOTECNICA |
title_short |
Redução da resistência de geogrelhas devido a danos químicos causados por resíduos de construção e demolição reciclados |
title_full |
Redução da resistência de geogrelhas devido a danos químicos causados por resíduos de construção e demolição reciclados |
title_fullStr |
Redução da resistência de geogrelhas devido a danos químicos causados por resíduos de construção e demolição reciclados |
title_full_unstemmed |
Redução da resistência de geogrelhas devido a danos químicos causados por resíduos de construção e demolição reciclados |
title_sort |
Redução da resistência de geogrelhas devido a danos químicos causados por resíduos de construção e demolição reciclados |
author |
Silvestre, Gabriel Ribeiro |
author_facet |
Silvestre, Gabriel Ribeiro |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Santos, Eder Carlos Guedes dos |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/7017825980724888 |
dc.contributor.referee1.fl_str_mv |
Santos, Eder Carlos Guedes dos |
dc.contributor.referee2.fl_str_mv |
Mascarenha, Marcia Maria dos Anjos |
dc.contributor.referee3.fl_str_mv |
Ângulo, Sérgio Cirelli |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/3102444140277522 |
dc.contributor.author.fl_str_mv |
Silvestre, Gabriel Ribeiro |
contributor_str_mv |
Santos, Eder Carlos Guedes dos Santos, Eder Carlos Guedes dos Mascarenha, Marcia Maria dos Anjos Ângulo, Sérgio Cirelli |
dc.subject.por.fl_str_mv |
RCD-R Geogrelha Dano químico Condição de saturação Resistência à tração |
topic |
RCD-R Geogrelha Dano químico Condição de saturação Resistência à tração RCDW Geogrid Chemical damage Saturation condition Tensile strength ENGENHARIA CIVIL::GEOTECNICA |
dc.subject.eng.fl_str_mv |
RCDW Geogrid Chemical damage Saturation condition Tensile strength |
dc.subject.cnpq.fl_str_mv |
ENGENHARIA CIVIL::GEOTECNICA |
description |
The growth of construction generates an increasing volume of construction and demolition waste (CDW) in the urban environment. Recent studies have shown the feasibility of using these materials in reinforced soil structures (RSS) with geosynthetics. In this context, most of these studies focused on investigations of the performance and mechanical damage suffered by geosynthetics during installation. However, chemical and environmental damage to geogrids from contact with the recycled construction and demolition waste (RCDW) over time is also important information for the design of these structures. Therefore, the main objective of this work was to evaluate the reduction of geogrid tensile strength due to chemical damage caused by RCDW when exposed to damage and different saturation scenarios. Characterization tests were performed on RCDW samples collected from a recycling plant. In-field test facilities were constructed to allow two types of geogrid (PET and PVA) being in contact with RCDW under three saturation conditions (dry, saturated and exposed to rain). Geogrid specimens were exhumed at two moments (1st and 2nd exhumations) to verify the occurrence and intensification of damage using SEM, EDX and tensile strength tests. During the exhumations, samples of RCDW and water were collected to geotechnical and chemical tests, respectively. Given the geotechnical focus of this study, tests commonly used for soil characterization were performed. Other tests were carried out to observe the chemical and composition characteristics of RCDW (pH and gravimetric composition). The results of the RCDW characterization showed characteristics very similar to those of granular soils, low variability of geotechnical parameters and alkaline characteristics. The SEM results showed the impregnation of RCDW on the geogrids. However, it was not possible to identify such aggregations by morphological analysis and EDX. Chemical analyzes in the liquids extracted from the in-field test facility during the exhumations processes indicated that RCDW could be classified as non-inert material. The tensile test results showed that PET geogrids presented a greater reduction of strength when exposed to the rainwater contact. Other parameters (strain and strength at 2% strain) were influenced differently. The results of PVA geogrids (2nd exhumation) showed that only the damaged samples in contact with rainwater showed no strength reduction. Regarding to other parameters evaluated of PVA geogrid, it was observed that the presence and type of water caused diverse changes. It is possible to conclude that the contact with water was the most significant factor in the geogrid strength changes when in contact with RCDW, with the effects being intensified on the damaged samples. However, the reduction factors observed could be implemented to designing RSS using RCDW and geosynthetics, thus demonstrating that RCDW could be employed as a friendly environmental backfill material. |
publishDate |
2019 |
dc.date.accessioned.fl_str_mv |
2019-10-09T15:02:05Z |
dc.date.issued.fl_str_mv |
2019-08-22 |
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 |
SILVESTRE, G. R. Redução da resistência de geogrelhas devido a danos químicos causados por resíduos de construção e demolição reciclados. 2019. 147 f. Dissertação (Mestrado em Geotecnia, Estruturas e Construção Civil) - Universidade Federal de Goiás, Goiânia, 2019. |
dc.identifier.uri.fl_str_mv |
http://repositorio.bc.ufg.br/tede/handle/tede/10082 |
dc.identifier.dark.fl_str_mv |
ark:/38995/00130000087qk |
identifier_str_mv |
SILVESTRE, G. R. Redução da resistência de geogrelhas devido a danos químicos causados por resíduos de construção e demolição reciclados. 2019. 147 f. Dissertação (Mestrado em Geotecnia, Estruturas e Construção Civil) - Universidade Federal de Goiás, Goiânia, 2019. ark:/38995/00130000087qk |
url |
http://repositorio.bc.ufg.br/tede/handle/tede/10082 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.program.fl_str_mv |
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