Faq

What do the concrete mixer operator do during delivering the Concrete?

02Jun

During delivering the concrete, there are many conditions which should have happened. If it happens unexpected situation, what do the concrete mixer operator do? This article list some solution.

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What do the concrete mixer operator do during delivering the Concrete?
Plugging hazard. Do not put concrete into the pump hopper until the operator directs you to do so. If the pump has not been primed, filling the hopper can cause the pump to plug. Plugs create a hazard because they cause the pump to reach maximum pressure.
Plugging hazard. Foreign material can cause blockages. If you see foreign material coming from the mixer truck, signal the operator to stop the pump. If you cannot get the operator’s attention, hit the emergency stop switch (E-stop). Do not allow the concrete chute rake or any other item to fall into the pump hopper. Do not attempt to grab foreign objects from the pump hopper while it is operating. Even if stopped, the pump is remote controlled and can start at any time. Alert the operator to stop the pump if you must remove foreign material from the hopper.
Hose whipping and other hazards. You must know how to stop the pump in an emergency. Have the operator show you the locations of the emergency stop switches and how they work. If an emergency arises, hit the E-stop switch, then tell the operator about the problem.
Hose whipping and other hazards. You must know how to signal the pump operator to stop the pump if you can’t keep enough concrete in the hopper. Some pumps are equipped with horn buttons on the rear of the pump. Have the operator show you how to signal them. Use the emergency stop switch only if you can’t get the operator’s attention, because there is a restarting procedure from emergency stop that may cause delays. In spite of the restarting procedure, do not hesitate to use the emergency stop if the need arises.
Hose whipping and other hazards. Keep the hopper about two-thirds full. Do not let the material level in the hopper become so low that air is sucked into the material cylinders of the pump. If air is sucked into the cylinders, the pump will compress the air. Compressed air always poses a hazard as it’s released from the pump or the delivery pipeline. Before air is sucked into the cylinders, signal the operator to stop the pump. Some pumps are equipped with switches which will stop the pump without using the emergency stop. In that case, the operator would be able to show you what to do.
Hose whipping and other hazards. Regardless of how it happened, if air is sucked into the cylinders, the pump MUST BE STOPPED. If you cannot get the operator’s attention, hit the emergency stop switch. It is the operator’s job to know how to safely remove air from the pump and delivery system. Do not refill the hopper unless directed to do so by the pump operator. Stand away from the hopper and the end hose until the operator has removed the trapped air from the delivery system and has signaled you that it is safe to begin unloading again.
Hose whipping hazard. Stay away from the end hose of the concrete pump. This is especially important to remember when the material is being placed close to the mixer truck. The tip hose may move quickly and unexpectedly, and if it is kinked, it could unkink violently.
Crushing and amputation hazard. Do not stand or allow anyone else to stand on the hopper grate. If they lose their balance, they can become trapped or killed in the hopper of the machine. Never lift or move the hopper grate for any reason.
Projectile hazard. Avoid walking under the boom of concrete pumping trucks. Avoid standing next to the elbow at the back of the pump.
Head injury hazard. Avoid walking under the outriggers of the concrete pump.
Tripping hazard. Try to avoid overfilling the hopper to the point where concrete piles up on the ground. As the concrete dries it creates a tripping hazard near moving machine parts.
Tripping and falling hazard. Do not climb on or off the pump truck while carrying anything that prevents you from using the “3 point rule.” Move objects separately, or have someone hand them to you when you are in a safe position. Avoid getting on the pump at all. Personnel should not stand on the pump because they could lose their balance near moving machine parts.
There is only one operator of the concrete pump. The pump operator is responsible for the safe operation of the pump and boom. If you have questions regarding correct or safe pumping procedures, talk to the operator. Different operators may have different procedures, and this doesn’t necessarily mean one of them is wrong. If in doubt, ask.
Safety is always in the hands of the people on the job. Monitor the movements of the boom, even if there are no electric wires nearby. Alert the operator if he/she is nearing an obstruction or hazard.

These just reference, the concrete mixer operator can solve some unexpected situation according to the principle. I suggest that the operators are best to read the operating introduction, remember some detail.


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