1. Unreasonable discharge residual rate and blade design. From the internal structure of the mixing drum, the mixing drum of the concrete mixer truck relies on the rotating drum to drive the spiral motion generated by the two spiral blades, so that the concrete can obtain both "tangential" and "axial" composite motion, so that the mixing drum has the functions of mixing and unloading. Therefore, the relevant factors forming this spiral motion, such as the curve parameters of the spiral blades, The geometry and size of the mixing drum have an important impact on the discharge residual rate of the mixing truck. The excessive unloading residual rate means that there will be more surplus materials in the mixing tank after unloading, so it is more likely to stick materials in the mixing tank over time.
2.運輸距離過長。隨著城市化的進程及城市規劃的要求，越來越多的攪拌站被要求遷到郊區和郊縣，與市區的距離越來越遠，而由於混凝土這一產品的特殊性，任何預拌混凝土在未添加緩凝劑的情況下，都在1h左右進入初凝狀態，如果這時才進行混凝土澆注施工，不但影響混凝土的工程質量，而且因混凝土失去流動性，易在攪拌筒及葉片上凝結，導致粘罐，嚴重時甚至整車混凝土粘在罐內及造成液壓設備的損壞，所以混凝土攪拌車運送預拌混凝土有其時間控製的輸送半徑，一般應控製在1h以內。
2. 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 suburbs and suburban counties, which are farther and farther away from the urban area. Due to the particularity of concrete, any ready mixed concrete will enter the initial setting state from left to right within 1h without adding retarder. If the concrete pouring construction is carried out at this time, It not only affects the engineering quality of concrete, but also because the concrete loses fluidity, it is easy to condense on the mixing drum and blades, resulting in tank sticking. In serious cases, even the whole vehicle concrete sticks in the tank and causes damage to hydraulic equipment. Therefore, the transportation radius of ready mixed concrete by concrete mixer truck is controlled within 1h.
3.工地施工設計不合理。工地在牆柱等施工中，會用塔吊吊鬥車的方法進行澆搗，由於塔吊的料本來塌落度就比泵送的低，更由於施工時間長，卸一車混凝土通常要2~4h，有些駕駛員為了省油而停止攪拌筒的正常轉動，這種情況下，特別容易造成粘罐，有時9方車一次粘罐就達1t，在夏天情況更嚴重。
3. Unreasonable site construction design. During the construction of walls and columns on the construction site, the tower crane bucket truck will be used for pouring and tamping. Because the slump of the tower crane is lower than that of the pump, and because the construction time is long, it usually takes 2 ~ 4H to unload a truck of concrete. Some drivers stop the normal rotation of the mixing drum in order to save oil. In this case, it is particularly easy to cause tank sticking. Sometimes the tank sticking of the 9-square truck can reach 1t at a time, The situation is more serious in summer.
4.使用維護不當。混凝土攪拌車駕駛員在攪拌車卸料完畢後未及時清理清洗攪拌罐內及葉片上殘留的混凝土，在攪拌車回站過程中不轉動攪拌罐，殘留的混凝土幹燥後凝固在拌筒及葉片上，以後就會越聚越多，形成粘罐現象。
4. 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 in time after the unloading of the mixer truck. During the return of the mixer truck to the station, the mixing tank does not rotate. The residual concrete will solidify on the mixing drum and blades after drying, and will gather more and more in the future, forming the phenomenon of tank sticking.
5.混凝土攪拌車工作環境溫度過高。夏季在南方地區白天中午前後，環境溫度經常超過30℃，在這種情況下運輸混凝土，將會由於混凝土坍落度損失快以及罐體周圍溫度相對中心更高，因而混凝土更容易粘罐。
5. The working environment temperature of concrete mixer is too high. In summer, the ambient temperature often exceeds 30 ℃ around noon in the South during the day. In this case, when transporting concrete, it will be easier for the concrete to stick to the tank due to the rapid loss of concrete slump and the higher temperature around the tank relative to the center.
