In today’s post we will talk about concrete mixers, which as we all know are machines widely used in construction, which are present in virtually all works and reforms.
They are machines used for the elaboration of the concrete, which avoid us having to make the manual kneading of the elements that constitute the concrete (cement, aggregates and water).
There are many types of concrete mixers on the market, which is why many times users may have doubts at the time of purchase. For that reason, in this post we will try to give the keys for the correct election, with the purpose of clarifying to the user the possible doubts that he has on which is the ideal concrete mixer for his case.
Choosing the right mixer
Next we are going to treat the 6 most important variables that come into play when buying a concrete mixer:
- Tank volume (litres)
Mobility (demountable, foldable or fixed)
- Engine (Electric or Fuel)
- Transmission (Crown or direct)
- Quality (DIY or professional)
Volume of the concrete mixer tank or drum
The volume of the tank or drum of the concrete mixer is surely the most important factor to take into account, since the concrete mixer that we select must be adequate to our needs. A bad selection in the volume of work will not allow us to work in an optimal way.
The choice of the volume of our concrete mixer will depend on the volume of work and the amount of concrete we need to obtain in each mix.
We will not require the same amount of concrete for a large work with several operators to go to make a small patch in a house or for do-it-yourself.
As we already know, the concrete must be used before it dries, reason why we will have to study which volume of vat is more optimal for us.
The volumes of the tank of the most common concrete mixers are usually between 80 and 350 litres.
It should also be borne in mind that the capacity of the tank will always be greater than the total volume of concrete obtained.
Mobility of the concrete mixer
Another important factor of decision is the mobility of the concrete mixer, since according to the use that we are going to give it, it will have a greater or lesser importance.
All the mixers are portable in different degrees, which is why we will classify them according to the ease of transport and assembly.
According to the mobility of the mixers we can classify them in:
Demountable concrete mixers:
The removable concrete mixers are usually DIY concrete mixers for domestic use. Their pieces are joined by means of screws that can be disassembled whenever you want, thus facilitating their transport and storage.
There are also some professional removable mixers, which are mixers specially designed for reforms, in order to facilitate their transport in small jobs where the mobility of the mixer is important.
Folding concrete mixers:
Foldable concrete mixers are concrete mixers whose legs or frame are folded to take up less space and thus facilitate the tasks of transport and storage.
Fixed concrete mixers:
Fixed concrete mixers are welded concrete mixers, which cannot be dismantled or folded. They take up more space and are therefore more difficult to transport, but they are also the most robust and durable.
They are the most used by professional users, especially in works and constructions.
Power of the concrete mixer
The power of the motor of our concrete mixer is also an important factor, since the greater the number of horses, the greater the work force of the concrete mixer, thus offering greater mixing power.
Nevertheless, it is not the only factor to take into account, since the transmission system and other mechanisms of the concrete mixer are also very important, since with a great power it can not be sufficient or it can be inferior that another concrete mixer of smaller power but greater quality in its mechanisms of transmission of the rotation.
Electric, gasoline or diesel concrete mixer?
The choice of the engine of our concrete mixer is also an important decision factor.
We can find them electric, gasoline and diesel; and the selection between them will depend on the needs of the work.
If there is an electrical socket, electric concrete mixers are almost always used, as they are cheaper and weigh less.
On the other hand, if there is no socket we will have to resort to a fuel or an electric with a generator to generate electric current. Normally this last option is used more, since the fuel mixers are more expensive and weigh more.
The transmission of the rotation in the mixer
There are two models of concrete mixers according to their transmission:
- Transmission by crown
- Direct transmission.
The concrete mixers of transmission by crown the motor transmits the movement to the vat by means of the reducer, the pinion and the crown.
On the other hand, in direct transmission concrete mixers the movement of the tank comes directly from the motor, with the help of the reducer and in some cases belts or sprockets, which is why they tend to be much quieter.
The quality of the concrete mixer, a very important factor
As you will have seen in the market we can find countless models of concrete mixers of all brands and prices.
All these models can be classified in two big groups according to the quality of the machine:
The cheap do-it-yourself concrete mixers
They are models of concrete mixers that are designed for occasional use in small do-it-yourself works or domestic uses.
These are simple and light, usually offering little robustness and work capacity.
Normally the do-it-yourself concrete mixers are very economic but of little known brands, fact that surely can take us problems at the time of obtaining spare parts when they have a breakdown.
For that reason, its purchase is interesting when we go to give a very sporadic use to the concrete mixer, and having in mind that it is possible that once it takes us problems it is possible that there is not possible repair.
We say this because there are many cases of this type that we have found along our trajectory of concrete mixers bought in large shopping centers, which do not offer any warranty.
The professional concrete mixers
Professional concrete mixers are machines designed for continuous work on site, thus being prepared to endure the entire working day at maximum performance without problems. These are heavier because they are more robust due to the higher quality of their materials.
The purchase of a professional concrete mixer guarantees us that it will last us many years, since they offer us a long useful life with the basic maintenance.
We have talked about extreme cases, but there are intermediate models which we would call semi-professional concrete mixers, which are not designed for intensive work but will surely fulfill their function very well in users who want to invest so much in a concrete mixer and who do not require intensive use.