MITIGAÇÃO DO SUPERDIMENSIONAMENTO EXCESSIVO DO CONCRETO PELA OTIMIZAÇÃO DO TEOR DE MATERIAIS CIMENTÍCIOS
DOI:
https://doi.org/10.29183/2447-3073.MIX2022.v8.n4.19-26Palavras-chave:
Teor de cimento, Cimento Portland, Concreto, Agregado calcário, Superdimensionamento, Resistência a compressãoResumo
Mais cimento n necessariamente melhora a qualidade do concreto ou agiliza os cronogramas de construo. Em contraste, o concreto com menor teor de cimento pode durar mais e atingir resistcia suficiente a tempo para evitar atrasos na construo. As normas tnicas exigem o superdimensionamento do concreto por dadas, mas estudos que avaliam as magnitudes do superdimensionamento real s raros. Este estudo experimental teve como objetivo identificar o teor de materiais cimentios necessio para atender ao superdimensionamento requerido com base em 958 ensaios de resistcia compress representando 8200 m de concreto para construes comerciais. O superdimensionamento real do concreto parece ser 7 a 21% acima do necessio. O conteo de materiais cimentios deve ser reduzido entre 6 e 17% para que o concreto possa atingir a resistência compress requerida sem excesso de cimento. O notel do superdimensionamento excessivo aumentou significativamente com o aumento da resistcia
compressão especificada, indicando que os produtores de concreto parecem ser mais cautelosos. Pesquisas adicionais s necessias para expandir a gama de aplicaes e teor de materiais cimentios.
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