Método construtivo de paredes de concreto moldadas in-loco com fibras de vidro: um estudo de caso
Nenhuma Miniatura disponível
Data
2023-06-16
Tipo de documento
Monografia
Título da Revista
ISSN da Revista
Título de Volume
Área do conhecimento
Engenharias
Modalidade de acesso
Acesso aberto
Editora
Autores
Krummenauer, Rafael
Orientador
Perez, Diego Marisco
Coorientador
Resumo
O setor da construção civil está em constante evolução, porém, quando se trata de introduzir novas tecnologias nos processos de construção, é notável a resistência em aceitar tais mudanças. As construtoras buscam cada vez mais o equilíbrio entre o custo final e o tempo de execução da obra. Um dos sistemas construtivos que vem ganhando força é o de paredes de concreto moldados in-loco, que se tornou um sistema industrializado, e é empregado na construção em grande escala de casas populares. Uma nova tecnologia que está sendo introduzida neste sistema é a adição de fibras no concreto, com o intuito de melhorar o desempenho pós concretagem, diminuindo a incidência de fissuras nas paredes de concreto. No presente trabalho, fez-se a apresentação de um estudo de caso de um empreendimento que utiliza o método construtivo de paredes de concreto, no qual foi adicionada fibras de vidro para reforçar o concreto. Foram apresentadas as etapas de execução do sistema construtivo e apontado as principais mudanças que a adição das fibras de vidro causou nas atividades e no orçamento final da obra. Após a coleta e análise dos resultados, verificou-se que a utilização das fibras de vidro como reforço estrutural do concreto simplificou algumas etapas de execução do processo, diminuindo o consumo do aço e reduzindo a mão de obra de armadores. Em contrapartida, notou-se uma elevação nos custos, principalmente na aquisição das fibras de vidro e na contratação dos ensaios tecnológicos exigidos pela NBR 16938.
The civil construction sector is constantly evolving, however, when it comes to introducing new technologies in construction processes, resistance to accepting such changes is notable. Construction companies increasingly seek a balance between the final cost and the execution time of the work. One of the construction systems that hás bem gaining strength is the cast-in-place concrete walls, which have become an industrialized system and are used in the large-scale construction of popular housing. A new technology that is being introduced in this system is the addition of fibers in concrete, with the aim of improving post-concreting performance, reducing the incidence of cracks in concrete walls. In the present work, a case study of an enterprise that uses the construction method of concrete walls, in which glass fibers were added to reinforce the concrete, was presented. The stages of execution of the constructive system were presented and the main changes that the addition of glass fibers caused in the activities and in the final budget of the work were pointed out. After collecting and analyzing the results, it was found that the use of glass fibers as structural reinforcement of concrete simplified some stages of the process, reducing steel consumption and reducing the workforce of shipowners. On the other hand, there was an increase in costs, mainly in the acquisition of glass fibers and in hiring the technological tests required by NBR 16938.
The civil construction sector is constantly evolving, however, when it comes to introducing new technologies in construction processes, resistance to accepting such changes is notable. Construction companies increasingly seek a balance between the final cost and the execution time of the work. One of the construction systems that hás bem gaining strength is the cast-in-place concrete walls, which have become an industrialized system and are used in the large-scale construction of popular housing. A new technology that is being introduced in this system is the addition of fibers in concrete, with the aim of improving post-concreting performance, reducing the incidence of cracks in concrete walls. In the present work, a case study of an enterprise that uses the construction method of concrete walls, in which glass fibers were added to reinforce the concrete, was presented. The stages of execution of the constructive system were presented and the main changes that the addition of glass fibers caused in the activities and in the final budget of the work were pointed out. After collecting and analyzing the results, it was found that the use of glass fibers as structural reinforcement of concrete simplified some stages of the process, reducing steel consumption and reducing the workforce of shipowners. On the other hand, there was an increase in costs, mainly in the acquisition of glass fibers and in hiring the technological tests required by NBR 16938.
Palavras-chave
Parede de concreto, Fibra de vidro, Custos