puc_maco2_08_dosagem_met_IPT-EPUSP.pdf - Dosagem de...

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Dosagem de concreto Prof. M.Sc. Ricardo Ferreira
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Método IPT-EPUSP: Fundamentos Prof. M.Sc. Ricardo Ferreira Fonte: ELETROBRAS FURNAS
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3/33 Lei de Duff Andrew Abrams
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4/33 Lei de Duff Andrew Abrams Design of concrete mixtures by Duff A. Abrams: 1918
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5/33 Lei de Duff Andrew Abrams Design of concrete mixtures by Duff A. Abrams: 1918
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6/33 ° Para um certo conjunto particular de materiais, a resistência do concreto é função da relação a/c . Lei de Duff Andrew Abrams c a cj k k f / 2 1 =
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7/33 Lei de Duff Andrew Abrams Design of concrete mixtures by Duff A. Abrams: 1918
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8/33 Lei de Inge Martin Lyse
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9/33 Lei de Inge Martin Lyse
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10/33 Lei de Inge Martin Lyse ° Para um certo conjunto particular de materiais e uma mesma consistência dos concretos a quantidade de água necessária para qualquer traço é a mesma . 1: a: b: a/c
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11/33 Lei de Inge Martin Lyse ° Como conseqüência podemos enunciar que para um certo conjunto particular de materiais, mantida a consistência do concreto medida pelo ensaio do abatimento do tronco de cone , o traço " m " é diretamente proporcional à relação a/c segundo a equação: c a k k m . 4 3 =
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12/33 Teor ideal de argamassa seca ° Para um certo conjunto particular de materiais, existe um teor ideal de argamassa seca “ α ” que é independente do traço ou resistência requerida . m a = 1 1 α 1: a: b: a/c a m b m a - = - = 1 ) 1 ( α
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13/33 Lei de Gilberto Molinari ° O consumo de cimento de um concreto correlaciona-se com o valor do traço seco m ” através de uma curva do tipo: m k k C . 1000 6 5 + = Gilberto Molinari (1909 – 1974)
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14/33 Ensaios de dosagem ° Deve-se realizar os ensaio de massa específica do concreto fresco ( γ cf ) e de determinação do teor de ar do concreto 29 :
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15/33 °
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  • Fall '14
  • Civil , Engenharia, Concreto, 42, Duff Andrew Abrams, Inge Martin Lyse

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