The amount of water for each batch is not correct according to the manufacturer's rate given, blended time not enough influence to some degree of consistency, when pouring out the texture will occur without an homogeneous phenomenon about the core components in the mixture, when the security will occur shrinkage phenomena created very easily cause stress cracking; construction work when the weather is too hot and when the surface of the concrete, coppha also so hot that not be saturated with water.
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