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.
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.
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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