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(yùn)輸距離過(guò)長(zhǎng)。隨著城市化的進(jìn)程及城市規(guī)劃的要求，越來(lái)越多的攪拌站被要求遷到郊區(qū)和郊縣，與市區(qū)的距離越來(lái)越遠(yuǎn)，而由于混凝土這一產(chǎn)品的特殊性，任何預(yù)拌混凝土在未添加緩凝劑的情況下，都在1h左右進(jìn)入初凝狀態(tài)，如果這時(shí)才進(jìn)行混凝土澆注施工，不但影響混凝土的工程質(zhì)量，而且因混凝土失去流動(dòng)性，易在攪拌筒及葉片上凝結(jié)，導(dǎo)致粘罐，嚴(yán)重時(shí)甚整車(chē)混凝土粘在罐內(nèi)及造成液壓設(shè)備的損壞，所以混凝土攪拌車(chē)運(yùn)送預(yù)拌混凝土有其時(shí)間控制的輸送半徑，一般應(yīng)控制在1h以內(nèi)。
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(shè)計(jì)不合理。工地在墻柱等施工中，會(huì)用塔吊吊斗車(chē)的方法進(jìn)行澆搗，由于塔吊的料本來(lái)塌落度就比泵送的低，更由于施工時(shí)間長(zhǎng)，卸一車(chē)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(zhuǎn)動(dòng)，這種情況下，特別容易造成粘罐，有時(shí)9方車(chē)一次粘罐就達(dá)1t，在夏天情況更嚴(yán)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(hù)不當(dāng)?；炷翑嚢柢?chē)駕駛員在攪拌車(chē)卸料完畢后未及時(shí)清理清洗攪拌罐內(nèi)及葉片上殘留的混凝土，在攪拌車(chē)回站過(guò)程中不轉(zhuǎn)動(dòng)攪拌罐，殘留的混凝土干燥后凝固在拌筒及葉片上，以后就會(huì)越聚越多，形成粘罐現(xiàn)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(chē)工作環(huán)境溫度過(guò)高。夏季在南方地區(qū)白天中午前后，環(huán)境溫度經(jīng)常超過(guò)30℃，在這種情況下運(yùn)輸混凝土，將會(huì)由于混凝土坍落度損失快以及罐體周?chē)鷾囟认鄬?duì)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.
