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.

小型自上料混凝土搅拌罐车启动前，应把搅拌筒操作手柄放在“停止”位置。自上料混凝土搅拌罐车起动发动机后，应使搅拌筒在低速下转动10分钟左右，使液压油温升到20℃以上后方可工作。

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 ℃.

自上料混凝土搅拌罐车在露天停放时，装料前应将搅拌筒反转，将积水和杂物排出，以混凝土的质量。自上料混凝土搅拌罐车在运输混凝土时，要滑斗放置牢固，防止因松动造成摆动，在行进中打伤行人或影响其它车辆正常运行。

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.

小型自上料混凝土搅拌罐车装运搅拌好的混凝土时，搅拌筒转速为2-10转/分，在运输过程中，平坦路面上搅拌筒转速在2-3转/分，行驶在侧倾坡度大于50的路面，或左右晃动较大的路面时，应停止搅拌旋转，待路况好转后再恢复搅拌旋转。

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.

小型搅拌车的混凝土搅拌时间不能超过搅拌站规定的时间。运送混凝土途中，搅拌筒不得长时间停转，以防混凝土产生离析现象。司机应时常观察混凝土情况，发现异常及时通报调度室，申请做出处理。搅拌车车内装有混凝土时，在现场停滞时间不得超过1小时，如超时应立即要求现场负责人给予及时处理。

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.

搅拌车运送混凝土塌落度不得低于8cm。从混凝土入罐到排出，气温高时不得超过2小时须排出，阴雨天气温度低时，不得超过2.5小时。搅拌车在排出混凝土之前，应使搅拌筒在10-12转/分的转速下转动1分钟，再进行排料。

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.