Oversize particles should be eliminated. Excessive mortar content will be necessary to effectively pump a concrete containing crushed aggregates than for concrete containing rounded aggregates.
A concrete pump is a tool mainly used for conveying freshly mixed concrete to the location on a construction site where it is needed to be placed. It works using a valve system and the basic fundamental of hydraulics.
The hydraulic oil flow created by the hydraulic pump pushes the drive cylinder pistons inside the drive cylinders alternately back and forth. Because the drive cylinders and concrete pistons inside the concrete cylinders are linked together, the pistons move synchronously.When a drive cylinder retracts along with the concrete piston, concrete will be sucked from the hopper into the concrete cylinder. Simultaneously, the other drive cylinder and concrete piston are extended toward the hopper. The concrete piston will push concrete from the concrete cylinders through the S-Tube and out to the concrete pipe and concrete hoses.Next, the pump switches at the end of the stroke, causing the s-tube valve to shift to the other concrete cylinder which has sucked and filled the cylinder with concrete, starting the next cycle.Reverse pumping links the concrete piston in the suction stroke and S-Tube valve to suck concrete from the s-tube instead of the hopper.
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