Although we often see why the concrete mixer always turns when driving, many people have different ideas, and many people feel that the principle is very simple. The concrete just out of the concrete mixing plant is the initial material, but the simple mixing is completed after batching. In order to better ensure the homogeneity of concrete, the second mixing must be completed in the concrete mixing tank truck.

通常搅拌罐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 mixing tank truck 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 excessive evaporation of water in the concrete, resulting in poor workability, affecting the quality of concrete pouring products, which is reflected in the product quality defects such as honeycomb surface reinforcement leakage.

混凝土搅拌罐车物流运输中途的第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，坍落度增大，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。

However, it is not easy for the driver to rotate the coarse aggregate too fast, and it is not easy for the concrete to sink in the second 8-6 minutes 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.

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