Estudo comparativo entre lajes nervuradas em concreto armado e lajes nervuradas em concreto protendido: fatores técnicos e econômicos
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Data
2021-06-25
Tipo de documento
Monografia
Título da Revista
ISSN da Revista
Título de Volume
Área do conhecimento
Engenharias
Modalidade de acesso
Acesso aberto
Editora
Autores
Siqueira Jr, Valmir
Acevedo, Ramon Leonildo Ferreira
Orientador
Medeiros, Ismael
Coorientador
Resumo
Diante do cenário econômico atual, onde cada vez mais as exigências dos clientes são evidentes, e a concorrência mais apurada, o empreendedor deve sempre procurar a inovação de seus produtos, porém, para que estes sejam vendáveis, eles devem ser economicamente viáveis. Pensando neste panorama, o presente trabalho apresenta uma análise comparativa entre os custos de execução de dois sistemas construtivos de Lajes, sendo eles o de Lajes Nervuradas em Concreto Armado e o de Lajes Nervuradas em Concreto Protendido. Este estudo comparativo circundou os serviços de formas de concreto, serviços de concretagem, serviços de armaduras de aço, cordoalhas engraxadas e cimbramentos, envolvendo custos dos materiais e os de mão de obra. Os dados quantitativos foram extraídos dos projetos estrutural e do memorial descritivo do empreendimento estudado, fornecidos pela empresa Eraldo Construções Ltda da cidade de Tubarão - Santa Catarina. Os custos dos materiais e índice de produtividade foram obtidos através do TCPO - Tabela de Composições e Preços para Orçamentos, utilizando as composições de serviços da ferramenta, com dados referentes ao mês de abril de 2021. Os resultados obtidos apresentaram economia para o sistema de Lajes Nervuradas em Concreto Protendido em 7,9% sendo o custo global da estrutura neste sistema de R$5.964.845,80, contra R$6.474.094,74 para o sistema de Lajes Nervuradas em Concreto Armado, sendo o primeiro sistema mais viável economicamente para o empreendimento em estudo.
In the current economic scenario, where customer demands are increasingly evident, and competition is more acute, entrepreneurs must always seek to innovate their products, however, for them to be salable, they must be economically viable. Considering this panorama, the present work presents a comparative analysis between the execution costs of two slab construction systems, namely that of Lajes Ribbed in Reinforced Concrete and that of Lajes Ribbed in Prestressed Concrete. This comparative study encompassed the services of concrete forms, concreting services, steel reinforcement services, greased strands and scaffolding, involving costs of materials and labor. Quantitative data were extracted from the structural projects and the descriptive memorial of the project studied, provided by the company Eraldo Construções Ltda in the city of Tubarão - Santa Catarina. The costs of materials and productivity index were obtained through the TCPO - Table of Compositions and Prices for Budgets, using the service compositions of the tool, with data for the month of April 2021. The results obtained showed savings for the Lajes system Ribbed in Prestressed Concrete by 7.9%, with the overall cost of the structure in this system being R$5,964,845.80, against R$6,474,094.74 for the Slabs Ribbed system in Reinforced Concrete, being the first more economically viable system for the project under study
In the current economic scenario, where customer demands are increasingly evident, and competition is more acute, entrepreneurs must always seek to innovate their products, however, for them to be salable, they must be economically viable. Considering this panorama, the present work presents a comparative analysis between the execution costs of two slab construction systems, namely that of Lajes Ribbed in Reinforced Concrete and that of Lajes Ribbed in Prestressed Concrete. This comparative study encompassed the services of concrete forms, concreting services, steel reinforcement services, greased strands and scaffolding, involving costs of materials and labor. Quantitative data were extracted from the structural projects and the descriptive memorial of the project studied, provided by the company Eraldo Construções Ltda in the city of Tubarão - Santa Catarina. The costs of materials and productivity index were obtained through the TCPO - Table of Compositions and Prices for Budgets, using the service compositions of the tool, with data for the month of April 2021. The results obtained showed savings for the Lajes system Ribbed in Prestressed Concrete by 7.9%, with the overall cost of the structure in this system being R$5,964,845.80, against R$6,474,094.74 for the Slabs Ribbed system in Reinforced Concrete, being the first more economically viable system for the project under study
Palavras-chave
Análise comparativa, Lajes, Concreto armado, Concreto Protendido, TCPO