It is difficult to imagine the implementation of large volumes of construction work without mixers, especially if there is no possibility of preparing the solution in large volumes directly at the facility. To conduct the correct calculations, a number of points should be taken into account. One of them is knowing how much concrete cubes are in the mixer, which makes it possible to determine the total volume of the working mixture and the possibility of one-time transportation of the required amount of mortar.
Car mixer: what is it?
The device in question is mounted on a car chassis. The working element in which the mixing and transportation of concrete takes place consists of the following structural parts:
- Drum mixer.
- Screw type mixers.
- Devices responsible for the rotation of the drum.
- Unloading device.
How does it work?
Before you know how many concrete cubes are in the mixer, let’s look at how this technique works. An important factor in the quality of the preparation of the solution is the uniform mixing of the loaded components. For this moment, a rotating drum with a screw mixing device is responsible.
The mixer is a fixed screw, the mixing operation is performed by rotating the drum. When filling in the raw material, the mixture enters the depth of the tank along the surface of the screw, where it is mixed to a homogeneous consistency. To unload the finished concrete, the drum rotates in the opposite direction. At the same time, the screw nozzle will facilitate the outflow of the contents of the mixer, forcing it out forcibly.
Classification
How many concrete cubes are in the mixer, largely depends on the modification of the car chassis and drum. Among the many types of concrete trucks, the main distinguishing parameters are noted:
- Type of wheelbase.
- Mixer working tank capacity.
- Methods of unloading the mixture.
- Features of the organization of rotation of the drum.
- The presence of additional equipment.
How many cubes of concrete in a KamAZ mixer?
Concrete mixers are available on various automobile chassis. Domestic units are most often mounted on KamAZ, as well as MAZ, ZIL and the Urals. The capacity of concrete depends on the volume of the drum.
Foreign counterparts most often use modifications to the Scania, MAN, Mercedes, Nissan, Mitsubishi, Volvo trucks. The main factor determining the one-time capacity of the working mixture is the volume of the working drum. In world practice, several standard values are accepted, which make it possible to optimize production needs, depending on the scale of work.
How many cubes of concrete in a KamAZ mixer? In domestic production, the following parameters are provided for the volume of the working drum: from 2 to 12 cubic meters. Most often, mixers with a capacity of five, seven, or nine cubic meters are ordered. Foreign modifications mainly use a volume of 6 cubic meters. m
Unloading
Unloading of the finished solution, regardless of how many cubes of concrete are in the MAN mixer or another car, is carried out in two ways: forward or backward. Frontal unloading is carried out under the direct control of the driver. This method is common among foreign manufacturers.
In the second case, the concrete is unloaded through a special neck in the rear of the equipment. This method is practiced in domestic industries, it is considered more reliable.
Rotary drive and accessories
The mixing drum rotates due to a motor with hydraulic and mechanical type drives. The power plant is sometimes presented in a combined version. The engine distributes power, which is expended on the movement of the machine and the rotation of the drum. The best option is an autonomous power unit, the power of which is aimed only at rotating the tank and unloading the concrete mortar.
How many cubes of concrete in the MAZ mixer are discussed above. But, in addition to the main drum unit, most mixers come with a number of additional devices. Among them:
- An elongated nozzle in the form of a gutter that serves to unload the mixture. Its length is 1500-2000 millimeters.
- Concrete pump.
- The tower is a sliding type for pumping concrete to high-rise objects.
How to calculate the amount of solution?
An important point remains the question of determining the real volume of the delivered concrete mortar. This is especially true for the delivery of mortar in mixers, the capacity of which exceeds the volume declared by the customer. There are several ways to determine how much concrete cubes are in a mixer.
The company, as a rule, weighs the shipped mortar. In this case, calculating the volume of concrete is not so difficult. The mass of the mixture should be divided by its density, the values of which are given below:
- Heavy grades of concrete filled with gravel or gravel - 1800-2500 kg / cu. m
- Light types of concrete with gas fillers from expanded clay or its analogues - 500-1800 kg / cu. m
- Foam concrete - less than 500 kg / cu. m
In addition, find out how many cubes of concrete in the mixer (standard) can be by the time the drum is emptied. On average, unloading one cubic meter of mixture takes about 5 minutes. Consequently, emptying a 6 cubic meter machine will take about half an hour.
Helpful information
It is worth noting that during prolonged transport with loaded mixers, the concrete mix is prepared directly in the drum.
In the cold season, in addition to standard components, additives and chemicals are added to the composition of the solution, preventing the concrete from freezing quickly.
When choosing a car mixer for transporting concrete, pay attention to the cleanliness of the inner surface of the drum. Poor flushing or its absence leads to the mandatory layering of solidified concrete residues on the walls. Over time, this mass will only increase, and it will be practically impossible to determine the actual amount of solution. In addition, the hardened mixture prevents the normal rotation of the drum, impairing the uniformity of mixing of the components and the quality of the final product.
In conclusion
The car mixer is an indispensable assistant on modern construction sites. It is used in large-scale complexes, as well as in the construction of country houses or cottages. In addition, the machine is used for pouring pools, various platforms, terraces, columns and other concrete structures. The technique significantly speeds up and facilitates the workflow. Depending on how many cubes of concrete are in the Scania or other vehicle mixer, the final fill volume at the construction site depends. Therefore, before ordering a solution, it is necessary to carry out accurate calculations so as not to overpay for surplus or not to finish up a small area for which there was not enough concrete.