Pursuing the construction of their own country house or equipping a small suburban building, homeowners are constantly faced with the need to prepare a large amount of concrete. Manually performing this work is difficult, and ordering ready-mixed concrete from specialized plants leads to a significant increase in the cost of construction. This problem can be solved by making a concrete mixer with your own hands, which will not be difficult to do. Due to the simplicity of the design, such a concrete mixer can be made by every summer resident and the owner of a private house.
Popular varieties of concrete mixers
The simplest equipment is a drum, which in motion is driven by a hand drive or a connected electric motor. Inside the drum, cement, sand, gravel or any other filler is poured, water is poured, after which, due to the rotation of the drum, the solution is mixed. You just need a quality scheme for the implementation of such equipment. Making a concrete mixer with your own hands, drawings for which can be found on the Internet for free, is not difficult.
The following types of concrete mixers are most widely used today:
- · Gravity.
- · Mechanical.
- · Vibrating.
- · Combined.
Let's talk in more detail about each of these types of equipment.
Gravity-type concrete mixers are the simplest construction, so if you plan to make it yourself, we can recommend using this principle of operation in the first place. At the same time, you should understand that gravity-type concrete mixers will not cope with the large volume of concrete mix preparation, and the quality of the mortar may be slightly lower than when using vibratory and mechanical installations.
The solution in such a concrete mixer is mixed due to the action of gravity, when the concrete is mixed under its own weight, which ensures the necessary uniformity of the mixture. Doing such a design with your own hands will not be difficult, while the costs will be minimal.
As a container, you can use a can of milk or an old unnecessary metal barrel. Such a barrel or metal can should be installed on a metal frame made by welding. The axis of rotation is fixed inside or outside the tank, and the drive is carried out using small gears and a durable handle. Small blades can be welded or fixed inside the container, which will improve the stirring of the solution. It remains only to perform small metal legs, which are welded to the supporting frame.
Mechanical or forced
In plants of this type, the mixing of the components is carried out in a fixed tank, inside of which there is a shaft with blades. This shaft is connected to a mechanical drive located outside the tank. Among the advantages of mechanical concrete mixers, we note their excellent efficiency, excellent quality of the prepared mortar and simplicity of design.
Vibration type plants
Such concrete mixers are used mainly in industrial construction, so we would not recommend choosing this type of structure for its use in the construction of a country house or a country cottage. Such equipment uses powerful vibrators located inside the tank. Working solution is poured into the centrifuge, water is poured, after which, due to prolonged exposure to vibration, the mixture is compacted, becomes uniform and suitable for use in construction.
Combined Type Concrete Mixers
Such equipment combines the advantages of gravity and mechanical installations. Inside the tank in the combined concrete mixers working blades are fixed, the size and configuration of which is thought out by the designers. When the centrifuge rotates, the blades used move under the weight of the solution, providing high-quality mixing of the mixture.
Among the advantages of combined type installations, we can note the following:
- No restrictions on the composition of the prepared solution.
- The units are reliable in operation and easy to maintain.
- Minimal wear on parts.
- Excellent performance and excellent quality of the prepared solution.
If we talk about the features of the manufacture of such concrete mixers of a combined type, we only note the need to strictly follow the schemes for performing such devices available on hand. You will need to make the internal blades exactly with the available documentation, which will ensure the performance of such equipment and the excellent quality of the prepared concrete mix.
We make a mixer ourselves
The implementation of such equipment is not difficult, so if you have initial skills in working with welding machines, each of us will be able to cope with the manufacture of such equipment.
Self-made concrete mixers have three main components:
- The container where the solution is mixed.
- The supporting frame on which the mixing bucket, manual or electric drive, various control elements are fixed.
- A drive is a mechanism that is responsible for the rotation of a container with a solution. Both an electric drive with a small motor and manual devices can be used, where, with the help of a gearbox and a belt, rotation from the handle is transmitted to the container with the solution.
Making a mixing tub
To perform such a mixing tank, you can use a metal can of milk or an old barrel with a capacity of 200 liters. The easiest way to make such a mixing bucket is to use a metal barrel or tank, which is cleaned of rust and painted with appropriate protective paint.
At the same time, we note that the classical shape of a metal barrel and tub is not very suitable for the manufacture of containers for a concrete mixer. The fact is that such a cylindrical shape leads to the fact that at the corners near the bottom there remains a large amount of unmixed solution, and from above the prepared mixture will be liquid, which leads to its splashing out.
The container used should be given a characteristic pear-shaped shape with a smooth transition from the bottom to the walls of the barrel. Triangular cuts are made from above, and the petals from the cuts are welded so that a uniform narrowing is obtained. Such a shape of the mixing tank will provide high-quality uniform mixing of the mortar, which guarantees the necessary consistency of the prepared concrete mortar.
Concrete mixer frame
The concrete mixer frame is a supporting structure to which the mixing tank, drive and wheels are attached for simplified movement of the entire structure. The easiest way is to make a stationary stationary frame, which is made of a welded corner. We can recommend you to pay attention to the scheme of manufacturing a frame with a hinge in which the bucket can take two positions: one working and the second with a downward inclination for unloading the solution. If necessary, you can use the grill base for the manufacture of a durable frame.
It is possible to easily carry out the supporting frame for the concrete mixer from profiled and cut pipes using scraps of sheet metal. You only need to use a welding machine, which will provide high-quality and maximum durable connection of all the metal elements of the supporting frame.
Choose a drive
Do-it-yourself drive concrete mixers are easiest to make from an electric motor and gearbox. It is necessary to correctly calculate the motor power, which is selected depending on the available volume of the mixing tank. For every 20 watts of electric motor power, there should be one liter of the prepared solution. Therefore, if you use a capacity of 50 liters, then the power of the electric motor should be at least 1 kW. Accordingly, when performing a concrete mixer, you need to choose the volume of the tank, starting from the available electric motor power.
You should correctly select the gear unit, with which the rotation will be transmitted from the electric motor to the working capacity. The mixer should rotate at a frequency of 30-50 revolutions per minute. Accordingly, it is necessary to choose the correct rotation speed of the electric motor and the gear unit used. Well, if it has the ability to adjust the speed, which will ensure maximum quality of the preparation of concrete mix.
In the event that it is not possible to find a ready-made gearbox, it can be performed from elements from an old bicycle or the drive of a washing machine. In the latter case, rotation is transmitted through pulleys and gears using belt drives. Correctly adjusting the drive, and, accordingly, the rotation of the mixing tank, it will be possible to ensure the smooth operation of such equipment.
Washing machine concrete mixer
Make compact, easy to use and reliable do-it-yourself concrete mixer It is possible from the engine from the washing machine and a metal barrel.
For this work you will need:
- Profiled pipes for frame construction.
- Castors from an unnecessary garden cart.
- Two pulleys with a diameter of 60 and 30 millimeters from the washing machine.
- Gear and flywheel from the starter Moskvich or Lada.
- The engine of the washing machine with a power of 180 watts.
- Steel barrel for 150-200 liters.
All metal elements used should be cleaned from rust, treated with a converter and coated with soil.
The frame is welded from the channel and pipes. Additionally reinforce the frame. metal plates.
By welding, the wheels from the trolley are attached to the frame.
From the pipes, a lodgement is welded to install a metal barrel.
A pin is welded to the frame, onto which the small and large gears are mounted.
Next, an electric motor is installed from the washing machine, while it is necessary to suspend it so that the belt drives from the gear are with the drive on the same level.
Gears connected to a belt drive.
It remains only to profile the barrel, making a narrow neck, and subsequently the container is mounted on metal gears.
It is necessary to connect the cable through a starter with a button to the electric motor and check the performance of a self-made concrete mixer.
A feature of such a mortar mixer, made from an old washing machine, is its low power; accordingly, no more than 10-15 liters of solution should be prepared at a time.
To make at home an effective and fairly easy-to-use concrete mixer is not difficult. It is only necessary to take care of the availability of a high-quality scheme, which you can download on the Internet, as well as correctly calculate the power of the engine used, the volume of the mixing bucket and the design of the drive, which will ensure excellent quality of the ready-made mortar prepared in such a self-made concrete mixer.