Geometric volume: The actual geometric volume of the mixing tank, which refers to the volume calculated using mathematical methods during the design of the mixing tank.

搅拌容积：搅拌车于水平位置，搅拌桶能容纳的未经搅拌的混凝土物料(包括水)，并能搅拌出运混凝土的量(以捣实后的体积计)，是搅拌车能够装载混凝土物料混合物(包括水水泥沙石等)不产生漏料现象的容量。 一般我们日常称的几立方搅拌车都是指搅拌车的搅拌容积。

Mixing volume: When the mixer truck is in a horizontal position, the mixing bucket can accommodate the largest amount of unmixed concrete materials (including water), and can be mixed and transported to the concrete (based on the volume after tamping). It is the maximum capacity that the mixer truck can load the concrete material mixture (including water, cement, sand, etc.) without material leakage. Generally, the term "several cubic meters of mixer truck" refers to the mixing volume of the mixer truck.

搅拌车容积：搅拌车能够运输的预拌混凝土量(以捣实后的体积计)，可以看成搅拌车到达工程现场所能够卸下的混凝土方量。考虑到上坡的时候搅拌筒会有倾斜，因此搅拌车容积是小的。

Volume of mixer truck: The volume of ready-mixed concrete that can be transported by the mixer truck (calculated by the volume after tamping) can be considered as the volume of concrete that can be unloaded by the mixer truck when it arrives at the project site. Considering that the mixing drum will tilt when going uphill, the volume of the mixing truck is minimal.

三者在数值上的大小关系应该是：几何容积＞搅拌容积＞搅拌车容积，我们经常所说的，多少方的搅拌车，指的就是它的搅动容积。

The numerical relationship between the three should be: geometric volume>mixing volume>mixer truck volume. As we often refer to the number of cubic meters of a mixer truck, it refers to its stirring volume.

对于搅拌车的装载限制，是有明确的标准。就拿我们常见的前四后八的搅拌车来说，也就是上面表格中的四轴搅拌车，它在装满混凝土之后的总质量要小于等于31吨，搅拌筒几何容积≤15.5m?，搅拌筒搅动容积≤8m?。

There are clear national standards for loading restrictions on mixer trucks. Take our most common mixer truck, the four axle mixer truck in the table above, for example. Its maximum total mass after being filled with concrete should be less than or equal to 31 tons, and the geometric volume of the mixing drum should be ≤ 15.5m?, The stirring volume of the mixing drum is ≤ 8m?.

一台前四后八搅拌车，它的实际装载量只有8m?，按照一方C30混凝土重量2.4吨来计算，8方混凝土就有19.2吨，也就意味着空车总质量不能超过11.8吨。

A front four rear eight mixer truck has an actual maximum loading capacity of only 8m?, Based on the weight of 2.4 tons of C30 concrete per cubic meter, there are 19.2 tons of concrete per cubic meter, which means that the total mass of the empty vehicle cannot exceed 11.8 tons.

不过很多搅拌站在实际操作过程中，往往会多装，如果混凝土的坍落度比较小的情况下，它的流动性很差，多装一些其实也不会溢出来。所以这个时候就存在超载的问题，而现阶段几乎所有的搅拌车都是这样装的。

However, in the actual operation process of many mixing plants, they often fill more. If the slump of the concrete is relatively small, its fluidity is very poor, and even adding more will not actually overflow. Therefore, there is an overload problem at this time, and at this stage, almost all mixing trucks are loaded in this way.

为了防范这一问题，国内规定，在左右车门要喷涂限载字样或者是总质量的字样标识，以此来监督搅拌车超载的问题。但是，这只能防君子，不能防小人。再加上超载之后可以大大减少搅拌车车辆数量，减少成本，因此超载成为了家常便饭。

In order to prevent this problem, domestic regulations require that the left and right doors be painted with the words "load limit" or "total mass" to monitor the overload of the mixer truck. However, this can only prevent gentlemen, not villains. In addition, overloading can greatly reduce the number of mixer vehicles and reduce costs, so overloading has become a common occurrence.

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