Viabilidade do uso de concretos ecológicos dosados com empacotamento de partículas.
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Tipo
TCC
Data de publicação
2021-12
Periódico
Citações (Scopus)
Autores
Camargo de Araújo, Gustavo Roberto
Gomes Tolim, Isabella
Gomes Tolim, Isabella
Orientador
Valadão Pacheco, Caroline
Título da Revista
ISSN da Revista
Título de Volume
Membros da banca
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Resumo
A emissão de dióxido de carbono (CO2) durante a produção do cimento é um dos principais impactos ambientais advindos da indústria da construção civil. O empacotamento de partículas se apresenta como uma ferramenta de dosagem capaz de reduzir o consumo de cimento nos traços, o que diminui as emissões de CO2 e o custo final do concreto, tornando-o atrativo para o mercado. Esse artigo possui o objetivo de analisar a viabilidade de utilizar concretos ecológicos dosados com empacotamento de partículas. Comparou-se teoricamente três traços empacotados, dosados com o Modelo de Alfred, com um traço referência utilizado em uma obra rodoviária. Os parâmetros analisados foram: nível de empacotamento, consumo de cimento, emissões de CO2 e custos. Utilizou-se hipóteses de resistência à compressão para análise relativa das emissões e custos. Verificou-se os resultados em larga escala para uma viga longarina de 24 metros. Todos os traços compensaram para custos e emissões, pelo menos a partir da hipótese em que sua resistência se iguala à do traço referência. O traço que alcançou melhores resultados reduziu em 33,33% o consumo de cimento, 20,15% as emissões de CO2 e 12,10% o custo total. Concluiu-se, de maneira teórica, que através do empacotamento é possível reduzir o consumo de cimento, os custos, e obter melhor custo-benefício mesmo com resistências à compressão inferiores à um traço convencional.
The carbon dioxide (CO2) emission during cement production is one of the main environmental impacts from the construction industry. Particle packing presents itself as a concrete design tool capable of reducing the consumption of cement in the mixes, reducing the CO2 emissions and the final cost of concrete, making it attractive to the market. This article has the purpose of analyzing the viability of using ecological concretes designed with particle packing. Three mixes, designed by Alfred's particle packing model, were theoretically compared with a reference mix used in a road construction. The analyzed parameters were packing level, cement consumption, CO2 emissions and costs. Compressive strength hypotheses were used for the relative analysis of emissions and costs. The results were verified on a large scale for a 24-meter longitudinal beam. All mixes compensated for emissions and costs, at least on the assumption that their compressive strength equals the reference. The mix that achieved the best results reduced cement consumption by 33.33%, CO2 emissions by 20.15% and total cost by 12.10%. Theoretically, it was concluded that, through particle packing, it is possible to reduce cement consumption, costs, and obtain a better cost-benefit ratio even with compressive strength lower than a conventional mix.
The carbon dioxide (CO2) emission during cement production is one of the main environmental impacts from the construction industry. Particle packing presents itself as a concrete design tool capable of reducing the consumption of cement in the mixes, reducing the CO2 emissions and the final cost of concrete, making it attractive to the market. This article has the purpose of analyzing the viability of using ecological concretes designed with particle packing. Three mixes, designed by Alfred's particle packing model, were theoretically compared with a reference mix used in a road construction. The analyzed parameters were packing level, cement consumption, CO2 emissions and costs. Compressive strength hypotheses were used for the relative analysis of emissions and costs. The results were verified on a large scale for a 24-meter longitudinal beam. All mixes compensated for emissions and costs, at least on the assumption that their compressive strength equals the reference. The mix that achieved the best results reduced cement consumption by 33.33%, CO2 emissions by 20.15% and total cost by 12.10%. Theoretically, it was concluded that, through particle packing, it is possible to reduce cement consumption, costs, and obtain a better cost-benefit ratio even with compressive strength lower than a conventional mix.
Descrição
Palavras-chave
empacotamento de partículas , concreto ecológico , cimento emissão de CO2 , particle packing , ecological concrete , cement , CO2 emission