We are no strangers to cement tankers. A friend drives cement tankers and usually deals with mixing plants. Today I'll tell you a legend about cement tankers. Because the State prohibits the production of concrete on the construction site, the concrete used to build the building on the construction site shall be transported to the construction site by cement tanker after being processed in the mixing plant.

混凝土罐車的原理和混凝土攪拌桶一樣，只不過是用車子把攪拌桶拉著走，邊走邊攪拌而已。到了目的地就可以把混凝土放下來！正常情況下罐車里面的混凝土是不會凝結的，因為車輛無論是行駛還是停止狀態，只要攪罐內有混凝土存在，攪罐必須時刻維持低速轉動。運輸時滾筒轉速每分鐘在4~8轉左右。保持轉動有幾個好處：只要保證混凝土不離析、保混凝土坍塌度！其次是攪拌功能，使混凝土更均勻！

The principle of concrete tank truck is the same as that of concrete mixing bucket, except that the mixing bucket is pulled away with the car and mixed while walking. When you arrive at your destination, you can put down the concrete! Under normal circumstances, the concrete in the tank truck will not set, because no matter the vehicle is running or stopped, as long as there is concrete in the mixing tank, the mixing tank must always rotate at a low speed. During transportation, the drum speed is about 4 ~ 8 revolutions per minute. Keeping the rotation has several advantages: as long as the concrete is not separated and the concrete collapse degree is guaranteed! The second function is to mix the concrete more evenly!

罐車和普通汽車的不同之處就在于液壓傳動系統，因為混凝土罐需要額外動力驅動旋轉，這個就是液壓傳動系統的功勞。動力源自變速箱上面的取力器，取力器驅動液壓油泵，液壓油泵通過分配器(閥組)來驅動液壓馬達旋轉，液壓馬達通過減速系統驅動混凝土罐旋轉。通過分配器改變液壓油的方向來改變滾筒旋轉方向，實現攪拌和放料。

The difference between tank cars and ordinary cars lies in the hydraulic transmission system, because the concrete tank needs additional power to drive the rotation, which is the credit of the hydraulic transmission system. The power comes from the power take-off on the gearbox. The power take-off drives the hydraulic oil pump. The hydraulic oil pump drives the hydraulic motor to rotate through the distributor (valve group), and the hydraulic motor drives the concrete tank to rotate through the deceleration system. The rotation direction of the drum is changed by changing the direction of the hydraulic oil through the distributor to realize mixing and discharging.

雖然旋轉可以延長混凝土初凝的時間，但是這個時間也不是可以無限延長的！混凝土罐的轉速每分鐘在4-8轉的時候混凝土初凝時間可以保持在3-5個小時左右，當然和天氣溫度、混凝土配合比有一定的關系，如果發生堵車可以適當提高轉速。天氣溫度過高初凝事件縮短也可以適量補水，但是施工方都有嚴格規定：途中禁止加水！會影響混凝土質量，降低強度等。

Although rotation can prolong the initial setting time of concrete, this time can not be extended indefinitely! When the rotation speed of the concrete tank is 4-8 revolutions per minute, the initial setting time of the concrete can be maintained at about 3-5 hours. Of course, it has a certain relationship with the weather temperature and concrete mix proportion. If there is a traffic jam, the rotation speed can be increased appropriately. If the weather temperature is too high and the initial setting event is shortened, an appropriate amount of water can be added, but the construction party has strict regulations: it is forbidden to add water on the way! It will affect the concrete quality and reduce the strength.

水泥罐車我們并不陌生，有個朋友就是開水泥罐車的，平時也和攪拌站打交道，今天就給大家講一講關于水泥罐車的傳奇故事。因為國家禁止工地現場制作混凝土，所以那些建筑工地用來蓋大樓的混凝土都要在攪拌站加工好以后由水泥罐車運輸到工地使用。

We are no strangers to cement tankers. A friend drives cement tankers and usually deals with mixing plants. Today I'll tell you a legend about cement tankers. Because the State prohibits the production of concrete on the construction site, the concrete used to build the building on the construction site shall be transported to the construction site by cement tanker after being processed in the mixing plant.