Offer Solution for the Problem of Concrete Pump Pipe Blocked

the reason of the blockage of the Concrete Pump working?

1. Sometimes wrong with the liquid concrete material. It mainly includes 3 reasons, such as the segregation of wet concrete, the sized of the aggregate is very big, and the remaining concrete sediment in the bottom hopper.

• during the mixing concrete, the mortar and fine aggregates are not covered with cement slurry, and the humidity effect was insufficient, therefore, the aggregates are more discretely, it may easily cause bleeding. Because no effective lubrication film was formed, the friction between the aggregate and the duct, and the aggregate and the aggregate increases.
• The coarse stones configuration is unreasonable. Among of this material, the larger the aggregate size, the worse the overall fluidity of the liquid/wet concrete.
• Insufficient control of the remaining wet concrete is lower than the mixing blades, in this way, it leads to inhaled air and tube blocking.

2. Sometimes wrong with concrete transport pump. It mainly includes 2 reasons, one is not good sealing of the delivery pipe, another maybe not cleaning completely for the pipes.

• If the sealing work not good for the pipeline, the leakage of the slurry will cause the poor flowability of the concrete due to the leakage of the cement slurry, and the friction will cause a blockage of the pipe.
• After the previous pumping was completed, the delivery pipe was not cleaned in accordance with regulations, resulting in an unobstructed pipe, which affected pumping.
• Both of these problems are particularly serious at the elbow.

3. Management problems of concrete delivery pump. It mainly include 3 reasons, such as the speed is too fast, very long intermittent time, insufficient consideration of temperature effects.

• The pump was not properly slowed down during the first pumping, which caused excessive friction inside the catheter and blocked the pipe.
• The intermittent time is too long, which causes the concrete to reach the initial setting state in the duct, which hinders subsequent pumping and leads to blocked pipes
• Insufficient consideration of temperature effects, unreasonable protection of the conduit, resulting in excessive evaporation of water or freezing, leading to blockage.

How to prevent the concrete transport pump blocked?

1. Selected materials without roughly
The amount of cement slurry should be sufficient; the particle size of the aggregate should be strictly screened. The maximum particle size of pebble should be less than 1/3 of the diameter of the delivery pipe, the maximum particle size of crushed stone should be less than 1/4 of the diameter of the delivery pipe, and the sand content should be greater than 40% The amount should be sufficient and kept above the stirring shaft. Pay attention to check the slump of the concrete. Those who are unqualified must use it after second mixing. Generally, it is 8-18cm, and it is generally 15cm when the distance is long and the height is large.

2. Concrete pump operated strictly

druing the pumping of the concrete pump, set up a special person to inspect the leak tightness of the catheter, and immediately find and repair the leak. When the pumping is finished, you must clean the catheter and set up a special person to inspect and supervise. Before each pumping, check whether the delivery pipe is unobstructed. Try to avoid blockage at the elbow.

3. Manage and Water Washing Carefully

Pump down slowly for the first time, and speed up properly after normal pumping. Generally, the pump is turned on every 5 minutes to prevent pipe blocking during intermittent periods. Concrete that has reached the initial setting state cannot be pumped. Cover the straw bag outside the duct to control the temperature and water in summer Cool down and cover insulation in winter.