Harm one: the concrete segregation is easy to cause plugging pump
Concrete mix from the tank truck to the pump truck pump bucket, as long as the continuous mixing generally will not occur slurry separation, in the continuous pumping construction generally will not block the pump, once the pump stopped for a period of time will cause the slurry floating, sand and stone sink close to the pipe wall to form a great resistance, resulting in unable to pump and block the pump.
Harm two: reduce concrete strength
Concrete mixture segregation is easy to cause mixing layer, that is, the lower stone more, less slurry, the upper slurry more stones less or basically no stones. For the concrete mixing ratio of segregation than good workability of concrete strength to reduce about 10%.
Harm three: affect the quality of the project
In the concrete pouring process, the segregation of the mixture is easy to cause the slurry to float up and flow slurry phenomenon, resulting in honeycomb. Vibration is easy to cause concrete mixture segregation and stratification, damage to the uniformity of concrete, and sometimes cause concrete slabs along the reinforcement crack.
