The construction process of any, even the smallest object, is associated with hard physical labor for a person. The most time-consuming operation, which requires serious physical effort and time, is the process of mixing concrete. Therefore, the use of a concrete mixer would be most welcome in such cases.

Content

• 1 Classification of concrete mixers
• 2 Units of gravitational action
• 3 Forced action units
• 4 Choosing a unit for your own needs.
• 5 Prices for concrete mixers

Classification of concrete mixers

The modern market can offer its consumers a wide enough range of the most diverse equipment for concrete mixing. Today, these units can to classify by several parameters.

1. Concrete mixers могут быть manual or electric. Electric ones are more convenient, since the operator does not need to exert great physical effort for mixing. While the solution is kneaded, the specialist can rest or do something else.
2. According to the principle of action of concrete mixers, they can be divided into devices continuous and periodic actions. Among themselves, such units are structurally different from each other, have differences in engine power and drum volume.
3. Units can produce building mixtures. different kind of. It can be cement concrete, expanded clay concrete, silicate or polymer cement solution, slag-alkaline mixture etc.
4. By volumeу produced in one batch of servings, the units are divided into 3 types:
   • the first type produces no more than 100 kg of the mixture;
   • второй вид производит раствор в volumeе 120 — 150 кг;
   • the third kind immediately mixes more than 150 kg.
5. By working principle Concrete mixers can be gravitational actions (it is preferable to make solutions of liquid consistency) and compulsory (mixing rigid solutions).

Gravity units

Currently, this is the most common type of technology, designed to obtain cement concrete mixes in small production and in living conditions. The main structural elements of such a device are a frame of welded metal structures, a working drum, a traverse, a turning mechanism, a clamp, a running gear and an electrical circuit. To make the machine more stable, manufacturers can equip the mixer with additional supports. The turning mechanism gives the operator the opportunity to change the position of the concrete mixer and fix it with the flywheel.

The basis of the process kneading in the gravitational apparatus is the free fall of the cement mortar. On the walls of the drum are special blades that raise the solution up to a critical upper point, from where the mixture under the action of gravitational forces falls down, thus stimulating the movement of the main mass of concrete in the drum. The quality of the mixture obtained with this method of production depends on the angle of inclination on which the bell is fixed, the shape and number of blades inside the drum, and the speed of rotation of the drum.

To the main benefits gravity concrete mixers include the following:

• the design is simple and reliable;
• regarding low weight unit, mixing with a sufficiently large volume of solution;
• the bell is tilted so it can easy to unload and the mixture does not remain inside the unit;
• the filler fraction may exceed 10 cm;
• for equipment characteristic low power usage;
• units are economical and unpretentious;
• can mix components with different size fractions.

However, against the background of all these advantages, gravity concrete mixers have some limitations:

• enough to get a homogeneous mix long mixing process;
• fiber and pigments are not efficiently distributed in the mixture;
• mixing of small fraction solutions is inefficient.

Forced action units

Main positive The characteristic of a forced-type concrete mixer is the high-quality and efficient mixing of the concrete mix. The whole process is carried out due to the movement of the blades, while the drum remains stationary.

Units of this type can be structurally different from each other and have a different drive system. Most common drives are:

• body trough forms with a horizontal shaft;
• body cylindrical формы с vertically расположенным валом.

У агрегата trough формы перемешивающие лопасти расположены на горизонтальном валу, вследствие чего процесс kneading раствора происходит весьма качественно. К disadvantages Such a device may include some of the difficulties experienced by the operator during unloading. As a result, the unloading period is extended. In addition, in such units it is unacceptable to use fillers larger than 4 cm.

Concrete mixers with a horizontal shaft with the highest efficiency produce dry mixes and sand pavement.

Units with vertically расположенным валом эффективно замешивают составы из разных наполнителей. Конструктивно такой аппарат представлен в виде cylindrical чаши и лопаток — смесительных и отборных. Первые перемешивают раствор, а вторые очищают оставшуюся смесь от стенок. Зазор между стенками барабана и лопатками позволяет замешивать растворы с достаточно крупными наполнителями. Загрузка такого устройства занимает много времени, однако это компенсируется высокой скоростью kneading. К disadvantages агрегата с вертикальным валом можно отнести высокий уровень энергопотребления, довольно приличную the cost and the inability to use components of different densities.

The choice of the unit for their own needs

Before you buy concrete mixer for personal needs, it is necessary to sensibly assess the scope of work for which an aggregate is needed. Of all the devices used on construction sites, concrete mixers are operated in the most difficult conditions. Therefore, it is worth acquiring ownership of devices whose mechanisms are reliably protected from abrasive wear, damage during operation and transportation, and adverse effects of weather factors. It must be remembered that concrete mixers are seasonal equipment. It is not recommended to carry out concreting works in the winter time, because the concrete produced at a temperature below + 3 ° C does not possess the necessary characteristics.

It is necessary to pay Attention on the ratio of the overall dimensions of the device and its mass. With a sufficiently impressive size, the device must have a relatively small mass so that the concrete mixer can be moved around the site where construction is underway.

Удобство во время эксплуатации и уровень шума также должны обратить на себя Attention потенциального владельца бетономешалки.

Further, the buyer should be aware that volume the produced solution is usually 2/3 of the volume of the working drum. That is, if the volume of the bowl is, say, 150 liters, then such a unit will produce 100 liters of the mixture in one batch, and not 120-130 - as the manufacturer can indicate.

The standard design of the mixer - the capacity for the components and the mixing device - does not change depending on the dimensions of the variant of the aggregate considered for the acquisition.

Надо также обратить пристальное Attention на operating voltage unit. At large construction sites, a voltage of 380 W is usually applied, and at small or private ones, 220 W. It is better to evaluate this issue and immediately purchase a concrete mixer with the necessary parameters, otherwise it may later require the purchase of an expensive generator. In addition, experts recommend to use euro outlets and eurocable for connecting to the mains.

Modern models manufacturers supply thermal relay. When buying, you should choose a model with the presence of such a controlling element, which will further protect the equipment from damage. In case of overheating, the unit will stop. Turn on the mixer can only be after it cools down. Cooling with water is not allowed.

Probably, there is no need to talk about the advantages of an electric device over a manual one.

Prices for concrete mixers

Concerning pricing question, it all depends on the characteristics of the mixer.

The following can significantly affect the price:

1. Location production. An assembly produced in Russia is cheaper for a Russian buyer than products from Europe or America.
2. Volume раствора, получаемого за один цикл работы устройства. Сегодня наиболее популярны среди покупателей бетономешалки volumeом в среднем 120−130 литров. Units with большим volumeом (800−1000 л) считаются специализированными, выпускаются поштучно и под заказ, что делает их производство достаточно дорогостоящим.
3. Quality applied accessories and materials. Saving on metal thickness, engine power, strength of drive belts and bearings, of course, makes the unit cheaper, but does not add quality to it.

If the price is approached purely formally, the cost of the device depends on the volume of the drum. Thus, the prices of concrete mixers with volumes from 60 to 800 liters are in the range from 5,000 to 80,000 rubles.

Huge manifold models of concrete mixers on the market of construction equipment, are able to satisfy the buyer with any financial capabilities and offer him a reliable assistant in the difficult task of construction and repair.