Quando você deve perfurar 20% em vez de 40% da laje de concreto?

A norma ASTM recomenda perfurar 20% na laje, SE a laje estiver secando em ambos os lados. Isso significa que haverá movimento de ar consistente em ambos os lados da laje. A razão para isso é que a curva de secagem começa na superfície superior, mas atinge seu ponto mais úmido no meio. Em seguida, ela começa a secar novamente na parte inferior, porque há movimento de ar e evaporação de ambos os lados.

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Última atualização em 2 de julho de 2024

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