No matter how excellent the performance of the concrete mixer truck is, in the process of long-term work, it is inevitable that the concrete congeals on the mixing tank and blades and sticks to the tank. If it is not cleaned in time, it is very easy to cause the overload of the automatic concrete mixer truck, which will cause the failure of the hydraulic pump and motor, and even affect the normal attendance of the vehicle. In order to solve this problem, this paper analyzes and discusses the causes of concrete sticking in the process of using concrete mixer truck.

经过实践和分析，我们认为混凝土全自动搅拌车粘罐原因可以分为两大类：即设计不合理和使用不当，主要有以下几种形式：

After practice and analysis, we believe that the causes of sticking can be divided into two categories: unreasonable design and improper use

1.运输距离过长。随着城市化的进程及城市规划的要求，越来越多的搅拌站被要求迁到郊区和郊县，与市区的距离越来越远，而由于混凝土这一产品的特殊性，任何预拌混凝土在未添加缓凝剂的情况下，都在1h左右进入初凝状态，如果这时才进行混凝土浇注施工，不但影响混凝土的工程质量，而且因混凝土失去流动性，易在搅拌筒及叶片上凝结，导致粘罐，严重时甚整车混凝土粘在罐内及造成液压设备的损坏，所以混凝土搅拌车运送预拌混凝土有其时间控制的输送半径，一般应控制在1h以内。

1. The transportation distance is too long. With the process of urbanization and the requirements of urban planning, more and more mixing plants are required to move to the suburbs and counties, and the distance from the urban area is getting farther and farther. Due to the particularity of concrete, any premixed concrete without adding retarder will enter the initial setting state in one hour, It not only affects the engineering quality of concrete, but also because of the loss of fluidity of concrete, it is easy to set on the mixing drum and blades, resulting in sticking to the tank. In serious cases, even the whole vehicle of concrete sticks to the tank and causes damage to the hydraulic equipment. Therefore, the transportation radius of ready mixed concrete transported by concrete mixer truck should be controlled within 1 hour.

 

2.工地施工设计不合理。工地在墙柱等施工中，会用塔吊吊斗车的方法进行浇捣，由于塔吊的料本来塌落度就比泵送的低，更由于施工时间长，卸一车混凝土通常要2~4h，有些驾驶员为了省油而停止搅拌筒的正常转动，这种情况下，特别容易造成粘罐，在夏天情况更严重。

2. Unreasonable construction site design. In the construction of wall and column, the method of tower crane bucket car will be used for pouring and tamping. Because the slump of tower crane material is lower than that of pumping, and the construction time is long, it usually takes 2 ~ 4H to unload a truck of concrete. Some drivers stop the normal rotation of mixing drum in order to save oil. In this case, it is particularly easy to cause tank sticking, which is more serious in summer.

3.使用维护不当。混凝土搅拌车驾驶员在搅拌车卸料完毕后未及时清理清洗搅拌罐内及叶片上残留的混凝土，在搅拌车回站过程中不转动搅拌罐，残留的混凝土干燥后凝固在拌筒及叶片上，以后就会越聚越多，形成粘罐现象。

3. Improper use and maintenance. The driver of the concrete mixer truck fails to clean the residual concrete in the mixing tank and on the blades after the unloading of the mixer truck, and does not rotate the mixing tank when the mixer truck returns to the station. The residual concrete solidifies on the mixing drum and blades after drying, and then it will gather more and more, forming the phenomenon of sticking to the tank.

4.混凝土搅拌车工作环境温度过高。夏季在南方地区白天中午前后，环境温度经常超过30℃，在这种情况下运输混凝土，将会由于混凝土坍落度损失快以及罐体周围温度相对中

4. The working environment temperature of concrete mixer is too high. In summer, around noon in the daytime in southern China, the ambient temperature often exceeds 30 ℃. In this case, the slump loss of concrete is fast and the temperature around the tank is relatively moderate

心更高，因而混凝土更容易粘罐。

The core is higher, so the concrete is easier to stick to the pot.

其实，混凝土在搅拌车拌筒中的运动是一个非常复杂的过程，而且粘罐现象的产生原因也是多种多样的，为有用规避混凝土粘罐对混凝土搅拌车工作状态和工作效率的影响，还望相关人员定要结合以上原因分析，及时制定并采取行之有用的防 治对策。

In fact, the movement of concrete in the mixer drum is a very complex process, and the causes of stick tank phenomenon are various. In order to avoid the influence of stick tank on the working state and efficiency of concrete mixer, we hope that the relevant personnel must combine the above reason analysis to formulate and take effective prevention and control measures in time.