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Seguir corretamente os traços do concreto é fundamental para garantir qualidade, segurança e durabilidade da estrutura. A dosagem feita diretamente em obra, porém, é um grande desafio: a variação de umidade da areia, o tamanho dos agregados e a medição pouco precisa dificultam manter o traço adequado. Quando esse controle falha, o concreto acaba apresentando excesso de argamassa, alta porosidade e baixa resistência, comprometendo a obra. Além disso, alcançar uma resistência elevada exige prop...
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O adesivo epóxi é usado para ancorar barras de aço em estruturas de concreto já existentes. Primeiro, é feito um furo no concreto, que deve ser corretamente limpo, e depois o adesivo é aplicado antes da introdução da barra. Após a cura, o epóxi forma uma ligação de alta resistência entre a barra de aço e o concreto, permitindo que os esforços sejam transferidos de um material para o outro. Por isso, essa técnica é muito utilizada em reforços estruturais, ampliações, ligações entre concreto novo...
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#construção #obra #
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