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Mobile concrete mixer with pump normal operation will not be blocked tube phenomenon. If you do not follow the normal operation of the phenomenon of plugging will happen. Let us interpret the reasons for plugging: Under normal circumstances, concrete in the center of the pipe to form a columnar fluid flow was suspended. The surface of the fluid is covered with a layer of grout, which acts as a lubricant in contact with the wall of the pipe, with virtually no relative movement between the aggregates. When some aggregates in the coarse aggregate are obstructed from moving, the velocity of the aggregate behind gradually gets sluggish, resulting in the accumulation of coarse aggregates in the pipe. The mortar supporting the coarse aggregate is squeezed away and the remaining gap Filled with small aggregates. In this way, the aggregate density increases, so that the section of the pipeline along the pipeline radial expansion of the composition, the cement slurry lubrication layer is damaged, increased resistance to movement, slow down until the movement stops and clogging.
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