Large tank volume not only affects the cost of car purchase, but also affects the vehicle performance. The driving safety coefficient is low. The larger the tank body is, the higher the center of gravity is, and the vehicle stability is poor. Therefore, the car owners should choose the appropriate concrete mixer truck according to the working conditions, environment, economic benefits, performance, safety and other factors.
混凝土搅拌车容积不能简单的认为就是罐体的容积，要有明确的三个概念区分：
First of all, the volume of concrete mixer truck can not be simply considered as the volume of tank, but should be distinguished by three clear concepts
搅拌车几何容积：搅拌桶内实际的几何容积，是指搅拌罐设计时，用数学方法计算出来的几何容积。
Geometric volume of mixer: the actual geometric volume in the mixing drum, which refers to the geometric volume calculated by mathematical method during the design of mixing tank.
搅拌动容积：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预拌混凝土容量按2400kg/m3计算。
Mixing dynamic volume: the amount of ready mixed concrete that can be transported by the mixer truck (based on the volume after tamping). It can be regarded as the concrete volume that the mixer truck can unload when it arrives at the project site. The ready mixed concrete capacity is calculated as 2400KG / m3.
搅拌容积：搅拌车置于水平位置，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）。
Mixing volume: when the mixer truck is placed in a horizontal position, the mixing bucket can hold the largest amount of concrete materials (including water) that have not been mixed, and can mix the volume transported to the concrete (based on the volume after tamping).
三者的关系应该是：搅拌车几何容积＞搅拌容积＞搅拌动容积，用户经常所说的容积应该是指搅动容积，所以在现购搅拌车时，要注意区分问清车辆的搅拌容积。
The relationship between the three should be: the geometric volume of the mixer truck > the mixing volume > the stirring volume. The volume often referred to by the user should refer to the stirring volume. Therefore, when purchasing the mixer truck, we should pay attention to distinguish the mixing volume of the vehicle.
