In the process of pumping concrete, the air entering the material pipe cannot be well mixed with the concrete, which belongs to uneven distribution or more, which is easy to cause air resistance.
The air entraining agent is a small bubble, which exists uniformly in the concrete mixture and plays a role of lubrication. It can reduce the flow resistance of concrete and facilitate the transportation of concrete.
The amount of air inhaled from the hopper is uncontrollable, and air is a material with high compressibility. Although the piston that is easy to collapse is working, the concrete in the material pipe flows very slowly or even stops moving, and it is easy to be blocked after a long time; The air added by air entraining agent is intentionally added, and the amount is small. It is evenly distributed, which is conducive to the transportation of concrete.
