7 tips for choosing a mortar mixer

8 min


You can prepare a solution of plaster or putty to level the walls, a cement solution or a self-leveling floor with your hands, but this will take a lot of time and effort, and they will still come in handy when you have to apply the prepared solution. It is much easier and easier to entrust the mixing process to a special device – a mortar mixer, which will do everything efficiently and quickly. How to choose a mortar mixer for use at home and at a large construction site? Which one is better to take, with continuous or cyclical action? We answer all questions.

Mortar mixer and concrete mixer – what do they have in common?

The name of the mortar mixer alone tells us what it is for. The principle of operation of this equipment is extremely simple. All the necessary components for the preparation of the solution are loaded into the tank, where they are mixed until homogeneous thanks to the blades located inside. The mechanism is driven by an electric motor. Muscle drive models are now practically not produced or sold. Also, mortar mixers with hydraulic and pneumatic drives are not particularly popular.

Additionally, the device can be equipped with a grate for sieving dry mixtures. The finished solution, after mixing, is poured out of the tank or fed through the sleeve of the mortar pump. That’s basically it.

The concrete mixer works in exactly the same way. So do they have a difference? By the principle of operation, no, but by the type of components used – yes. Components with a particle size of 1.5-2 to 7 cm are loaded into a concrete mixer. If components with a fraction size of no more than 1-1.5 cm are mixed, then it is better to use a mortar mixer.

As you can see, the principle of operation of the mortar mixer is simple. Nevertheless, depending on the characteristics of some nodes, several types of devices are distinguished. This will be discussed further.

Types of mortar mixers according to the principle of operation

According to the principle of operation, the equipment is divided into two types:

  • continuous (constant) action;
  • periodic (cyclic) action.

Continuous Mortar Mixers are powerful performance equipment required on construction sites. Such devices can stir for a long time and supply the ready-made solution. In order to ensure long-term non-stop operation, all parts in such devices are made of materials with increased wear resistance, and therefore, permanent-action mortar mixers are not cheap. In private construction, their use is meaningless, since it will be impossible to fully reveal the potential of the equipment. At a construction site, where work is in full swing, and there is a constant need to prepare solutions, this is the best solution.

Batch mixers are a little simpler. Here, mixing and feeding occurs cyclically, with interruptions. Such devices are widely used in private construction and on small construction sites, since they are relatively inexpensive and can provide the performance required in these conditions.

Mortar mixers from the company “Diam-Almaz”

The company works with trusted equipment manufacturers, has offices and pick-up points in major cities throughout Russia. Buyers can count on competent advice and a constantly growing range of various construction equipment.

Choose by volume of the bunker, manufacturer, principle of operation, type of engine, and you can buy by going to the catalog “Solvent mixers“Diam-Almaz store.

Types of mortar mixers by mixing method

All the ingredients of the future mixture, immersed in the drum, are mixed using blades, only these blades can be arranged in different ways, hence the differences. So, according to the peculiarities of mixing, mortar mixers can be:

  • compulsory action;
  • gravitational.

Compulsory mixers feature a stationary drum and rotating blades. Such equipment is more productive, suitable for the preparation of almost all types of mixtures, and all solutions are obtained of high quality and perfectly mixed. Higher performance also requires increased engine power. On average, the power of the electric motor in a forced-action mortar mixer is twice that in a gravity mixer of the same volume. Another disadvantage is the higher price. This is equipment for large construction projects.

Compulsory mortar mixers, depending on the location of the body and blades, are:

  1. with horizontal shaft and horizontal-cylindrical body. The equipment is in the form of a lying cylinder, the shaft / shafts with blades are located at the ends. Provide high-quality mixing of any solutions. A small drawback – a slightly higher weight compared to an analogue with a vertical shaft;

  2. with vertical shafts. It is easy to guess that the blades are located here in a vertical plane. A distinctive feature of such devices is the presence of an insert, a hollow cylinder in the central part of the drum. It is necessary so that unmixed components of the solution do not accumulate in the center. Mortar mixers of this type are more productive, convenient and versatile, therefore they are more widespread in construction.

Gravity grout mixers work a little differently. In them, the blades are fixedly fixed inside the drum, and when the equipment is turned on, the drum begins to rotate. As a result, the contents, under the action of gravity, begin to fall from one part of the wall to another, fall on the blades, as a result of which mixing occurs. The mixing process is faster when the drum is tilted. By adjusting the slope, you can control the mixing process. Mixing quality also depends on the shape, size and number of paddles. Another important factor is the drum rotation speed.

Gravity mixers are relatively inexpensive, their simple design is quite reliable and durable. Loading and unloading the mix is ​​easy, cleaning the drum and blades from the mix is ​​easy. In addition, such equipment uses less powerful motors, and this is a solid economy during long-term operation. For example, a mixer with a volume of 130 liters requires a motor with a power of 0.65 kW, for a device with a volume of 180 liters – 0.9 kW.

And if concrete mixers of the gravity type are called not very versatile, then mortar mixers benefit in this regard, since they use smaller fractions. However, with some mixtures it is very difficult to achieve uniformity, and sometimes even impossible. But these are all very rare cases, because gravity mixers are very popular in private construction, and they are also actively used on small construction sites.

Solvents by type of transmission

Depending on the internal structure, mortar mixers are:

  • gear;
  • crowned.

In gearboxes, the gearbox is protected from sand and dirt by placing it in a separate housing. The risk of breakdown is reduced, noise is also, durability and performance are at a height, but if the engine or gearbox fails, then repairing them will be so difficult and expensive that it will be easier to buy new equipment.

Crowned (crown, crown, belt). Power from the engine is transferred to the drum thanks to gears and a rim on the rim. The mechanism has no protection against the ingress of debris, but, on the other hand, in which case the repair is as simple and quick as possible. It is this equipment that is recommended for use in private construction. It costs less and can be repaired, although it does not have such a record durability as gear mixers.

The material used to make the crown affects the durability of the mixer. There are several options:

  1. a steel crown is the best option, it is characterized by high strength and durability. Such mechanisms are suitable even for permanent use, but they are expensive, therefore they are purchased mainly by professional builders, and not for private use;

  2. a plastic crown is the most budgetary and least durable option. Of the significant advantages, apart from the price, there is only a low noise level during operation. Cons – everything else. Plastic crowns wear out quickly, therefore they are not suitable for frequent use, but they will fit for small repair work;

  3. a cast iron crown is stronger than plastic, but worse than steel. This is a compromise option in terms of price and durability, because it is precisely such elements that are often found in mortar mixers.

Drum volume

The volume of the mixing tank is selected depending on how often you will use the equipment and how much solution will need to be prepared at a time. When considering different models, keep in mind that the actual volume of the prepared mixture will always be 20-40% less than the declared volume of the tank – this is normal. All mortar mixers by the volume of the tank can be conditionally divided into the following groups:

  • up to 100 l – the most compact models, suitable for infrequent and small-scale work. For example, prepare a solution for laying tiles or for arranging garden paths;

  • up to 150 liters – an option if you need to build a small house. Such mixers, due to their relative compactness, mobility and inexpensive price, are in greatest demand among both professionals and home craftsmen;

  • 150-300 l – purely professional equipment, suitable for the construction of a large cottage. Costly, weighs a lot;

  • more than 300 liters – the equipment is used in large-scale construction, for example, in the construction of a multi-storey building.

Power

The larger the mixer tank, the more power it will need to prepare the solution:

  • for home use, devices with a power of up to 1 kW are suitable. However, it is not easy to find a mortar mixer with a higher power and power supply from the 220 V network. In most cases, a 600-700 W device is sufficient for domestic use;
  • more powerful equipment will require power from a 380 V three-phase network and has a power of more than 1 kW. This is equipment that can work day and night, therefore it is indispensable at the construction site.

What else to consider when choosing?

To choose a durable and durable mortar mixer, you should also pay attention to the following parameters:

  • type of drive. Most of the faucets on the market are electrically driven, powered by 220 V or 380 V. The most convenient, unpretentious and practical. Hand taps are almost history. They required too much strength, moreover, they did not free the hands of a person, therefore, in fact, they were not much different from a basin with a shovel. Air and hydraulic mixers require compressed air or high pressure water. This equipment is expensive and difficult to maintain and is used only on large construction sites. Motor-driven equipment runs on gasoline or diesel. The solution is not the most common, but it is still found in mixers with a large tank volume, plus – no wires are needed. Minus – the presence of exhaust gases, noise, the need to constantly buy and fill fuel, and inside the premises such equipment is not used;

  • case thickness. The bigger, the better. Within reasonable limits, of course. Even the strongest steel erodes over time under the action of the components of mortars, therefore the required minimum is 2 mm;

  • color is not a design issue, but safety. The brighter the grout mixer, the better and farther it will be seen, and in any weather, because construction equipment (and not only grout mixers, by the way) is painted yellow, orange and red;

  • seasonality of work. Most of the models are designed to work in the warm season, but there are also all-season mixers that can ensure high-quality preparation of the solution at low temperatures. For their manufacture, special alloys are used, and therefore such equipment is more expensive;

  • mobility. There are mobile devices that are equipped with wheels and can easily move from place to place. It’s comfortable. The most productive and powerful models, as a rule, are produced in a stationary version;

  • the loading / unloading system is usually of a manual type, but in more expensive models these processes are carried out automatically;

  • an overload sensor shuts down the motor, preventing overheating. Convenient, but the cost of the mixer increases from this.

Finally, we note that in some cases it is more profitable to rent a mortar mixer than to buy it permanently. If you regularly carry out minor repairs, then it will be more profitable to purchase a compact model for personal use.

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Steve

Passionate about DIY for over 10 years and all the new tools, I give you through this blog all my advice, tips, tests in all areas: carpentry, electricity, masonry, gardening, home automation ...

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