Why does the tank of concrete mixer always turn when driving? Although we often see it, many people have different ideas, and many people feel that the principle is very simple. Concrete mixer just out of the concrete mixer is the initial material, but after mixing, it is relatively simple to complete the mixing. In order to better ensure the homogeneity of concrete, it is necessary to complete the secondary mixing in the concrete mixer.

通常搅拌车须要确保每分十-三十转的速度，夏天很有可能更低，只须要确保混凝土不产生离析和初凝就可以，过于频繁的拌和反倒会导致混凝土中的水份过于挥发导致出料和易性差，影响到混凝土构件浇筑产品质量，反映在蜂窝表面漏筋等产品质量瑕疵上。

Generally, the mixer needs to ensure the speed of 10-30 revolutions per minute, which is likely to be lower in summer. It only needs to ensure that the concrete does not produce segregation and initial setting. On the contrary, too frequent mixing will lead to too much evaporation of water in the concrete, resulting in poor discharge and workability, which will affect the quality of concrete pouring products, which is reflected in the quality defects of honeycomb surface reinforcement leakage and other products.
                          

混凝土搅拌车物流运输中途的二次拌和应属深加工，可是并不是比较简单的转动，罐体转动次数对混凝土的均质性尤其关重要，6~8转/分钟为宜；过慢，混凝土内部粗骨料容易下沉，太快，对驾驶员的有一定的影响到，而且也会增加混凝土水份的流逝，坍落度加大，影响到卸料；6~8转/分钟时，混凝土的初凝时间通常在3~6个小时。短暂的堵车对混凝土的影响到微乎其微，如果堵车时间过长，混凝土的罐体转动次数要适当加快1~2圈，并要时刻注意罐体转动是否异常，适当的时候可以加水来保持混凝土的和易性，避免粘罐和闷罐。

The secondary mixing of concrete mixer truck in the middle of logistics transportation should be deep processing, but it is not a simple rotation. The rotation times of the tank body are particularly important for the homogeneity of concrete, 6 ~ 8 rpm is appropriate; if it is too slow, the coarse aggregate inside the concrete is easy to sink, too fast, which has a certain impact on the safety of the driver, and it will also increase the water loss and slump of the concrete The initial setting time of concrete is usually 3-6 hours at 6-8 rpm. The short-term traffic jam has little effect on the concrete. If the traffic jam is too long, the rotation times of the concrete tank should be appropriately accelerated by 1 ~ 2 circles, and attention should be paid to whether the rotation of the tank is abnormal at all times. When appropriate, water can be added to maintain the workability of the concrete to avoid sticking and stuffy tank.

在混凝土搅拌车物流运输中途充分拌和还可以缩短混凝土初凝时间、提高混凝土的物理性能。

It can also shorten the initial setting time of concrete and improve the physical properties of concrete.

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