Utilização de Resíduo de Corte de Mármore em Argamassa
Carregando...
Data
2017-07-25
Autores
Bandeira, Caroline Mateus
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
O resíduo de corte de mármore é um grande problema ambiental devido a deposição inapropriada ao redor das jazidas. Isso ocorre com frequência, por exemplo na região da Comarca Lagunera, México. Assim, este trabalho tem por objetivo analisar a incorporação de resíduos de mármore na produção de argamassas, assegurando as propriedades necessárias para sua posterior utilização em concretos. Para isso foram estudados diferentes traços de argamassa com a incorporação de frações de 0%, 5%, 7,5% e 10% de resíduo em relação ao peso da areia. Foram analisadas a micro e macroestrutura das amostras de acordo com os seguintes ensaios: i) Microestrutura: Difração de raios-X (DRX) e fluorescência de raios-X (FRX); ii) Macroestrutura: ensaio de mesa de consistência para estado fresco, e resistência à compressão, para estado endurecido. Para as análises, foram produzidas amostras com dois tipos de cimento, CPV (cimento de alta resistência inicial) e CPIV (cimento com adições pozolânicas). O acompanhamento no DRX se deu de forma contínua nas primeiras 24 horas, para observar o surgimento de diferentes estruturas cristalinas, e posteriormente nas idades de 3, 7 e 28 dias. Estas mesmas idades foram utilizadas para determinar as propriedades mecânicas das argamassas. Através dos resultados foi possível observar que a adição do resíduo diminuiu inicialmente a trabalhabilidade da argamassa na adição da primeira proporção, porém a argamassa se torna mais trabalhável conforme aumentou-se a proporção de resíduo. Foi possível ainda, verificar que a resistência à compressão da argamassa aumentou cerca de 30% utilizando cimento CPV. Com isso pode-se concluir que a incorporação de resíduo é benéfica nas proporções analisadas.
The marble cutting residue is a major environmental issue due to improper deposition around the deposits. This occurs frequently, for example in the region of Comarca Lagunera, Mexico. Thus, this work has the objective to analyze the marble residues’ incorporation in the mortars’ production, assuring the necessary properties for its later use in concretes. Different mortars’ mixes were studied with the residue fractions of 0%, 5%, 7.5% and 10% incorporation in relation to the sand’s weight. The samples micro and macrostructure were analyzed according the following tests: i) Microstructure: X-ray diffraction (XRD) and X-ray fluorescence (XRF); ii) Macrostructure: consistency table test for fresh concrete condition, and compressive strength, for hardened condition. The analyzed samples were produced with two types of cement: CPV (high early strength Portland cement) and CPIV (cement with pozzolanic additions). The XRD measures occurred continuously in the first 24 hours, to observe the appearance of different crystalline structures, and later at the ages of 3, 7 and 28 days. These same ages were used to determine the mortars’ mechanical properties. The results showed that the residue’s addition initially reduced the mortar’s workability when the 5% of sand was replaced for the residue, but the mortar became more workable as the residue’s proportion was increased. It was also possible to verify that the compressive mortar’s strength increased by 30% using CPV cement. It can be concluded that the residue incorporation is beneficial in the proportions analyzed.
The marble cutting residue is a major environmental issue due to improper deposition around the deposits. This occurs frequently, for example in the region of Comarca Lagunera, Mexico. Thus, this work has the objective to analyze the marble residues’ incorporation in the mortars’ production, assuring the necessary properties for its later use in concretes. Different mortars’ mixes were studied with the residue fractions of 0%, 5%, 7.5% and 10% incorporation in relation to the sand’s weight. The samples micro and macrostructure were analyzed according the following tests: i) Microstructure: X-ray diffraction (XRD) and X-ray fluorescence (XRF); ii) Macrostructure: consistency table test for fresh concrete condition, and compressive strength, for hardened condition. The analyzed samples were produced with two types of cement: CPV (high early strength Portland cement) and CPIV (cement with pozzolanic additions). The XRD measures occurred continuously in the first 24 hours, to observe the appearance of different crystalline structures, and later at the ages of 3, 7 and 28 days. These same ages were used to determine the mortars’ mechanical properties. The results showed that the residue’s addition initially reduced the mortar’s workability when the 5% of sand was replaced for the residue, but the mortar became more workable as the residue’s proportion was increased. It was also possible to verify that the compressive mortar’s strength increased by 30% using CPV cement. It can be concluded that the residue incorporation is beneficial in the proportions analyzed.
Descrição
Palavras-chave
Argamassa, Resíduo de corte de mármore
Citação
BANDEIRA, Caroline Mateus. Utilização de resíduo de corte de mármore em argamassa. 2017. 59 p. Trabalho de Conclusão de Curso (Engenharia Civil e Infraestrutura) - Universidade Federal da Integração Latino-Americana (UNILA), Foz do Iguaçu, 2017.