First of all, let's talk about whether the driver's license of small concrete mixer is needed. To drive a concrete mixer, you need B2 certificate. If you have a work license, you can go to the place where your driving license is. Small concrete mixer is a kind of vehicle, not all drivers who can drive will drive concrete mixer, if the operation is improper, it will cause rollover, hydraulic pump, motor, reducer too fast wear and even serious consequences.
Before starting the small concrete mixer, the operating handle of the mixing drum should be placed in the "stop" position. After the concrete mixer starts the engine, the mixing drum should be turned at low speed for about 10 minutes, and the hydraulic oil temperature should be raised to above 20 ℃.
When the concrete mixer truck is parked in the open air, the mixing drum shall be reversed before loading to discharge the accumulated water and sundries, so as to improve the quality of concrete. When the concrete mixer transports concrete, the sliding bucket shall be placed firmly to prevent swing caused by looseness, which may injure pedestrians or affect the normal operation of other vehicles.
When the small concrete mixer truck transports the mixed concrete, the rotation speed of the mixing drum is 2-10 rpm. During the transportation, the rotation speed of the mixing drum is 2-3 rpm on the flat road. When driving on the road with a roll slope greater than 50 or the road with large left and right shaking, the mixing rotation should be stopped, and the mixing rotation should be resumed after the road condition improves.
The concrete mixing time of small mixer shall not exceed the specified time of mixing station. During the transportation of concrete, the mixing drum shall not stop for a long time to prevent concrete segregation. The driver shall observe the concrete condition from time to time, report the abnormality to the dispatching room in time, and apply for handling. When the mixer truck is equipped with concrete, the dead time on the site shall not exceed 1 hour. If it exceeds the time limit, the person in charge of the site shall be required to deal with it in time.
The slump of concrete transported by mixer truck shall not be less than 8cm. When the temperature is high, the concrete shall not be discharged for more than 2 hours, and when the temperature is low in rainy weather, it shall not be discharged for more than 2.5 hours. Before discharging concrete, the mixer truck should rotate the mixing drum at the speed of 10-12 rpm for 1 minute before discharging.