![]() Insufficient mixing can cause segregation in the mix. ![]() ![]() Concrete can bleed due to poorly graded sand that allows water to bleed through the small channels formed due to voids in the sand or if the concrete is too wet. The most common mix problem is concrete that does not retain its mixing water. ![]() Causes of BlockagesThere are basically three main causes of pump line blockages: a deficiency in the mix design problems with the pipeline itself and the human factor, or operator error.
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