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Proportions for the manufacture of concrete: the optimal - Blog about repair

Proportions for the manufacture of concrete: the optimal

01-05-2018
Building

Concrete is one of the most durable materials used in modern construction. It is used at almost all stages of the construction of a building and, at the same time, it can be manufactured directly at the facility. However, it is necessary to know the proportions for making manually to obtain a solution with the necessary qualities.

Amateur photo, the process of making a mortar using a concrete mixer

Brand selection and manufacturing

To begin with, it must be said that each individual brand of this material implies the presence of a strictly defined amount of binder and its relationship with other elements. However, accurate calculation on the construction site is very difficult to make and the masters use approximate measurements. At the same time they are trying to get a brand of concrete 300, since it is she who is the most popular and practical.

A table with indications of different proportions in different units of measure, which are used to make concrete of a particular brand

Main components

First of all, it must be said that proportions are used for manufacturing in the concrete mixer. The fact is that with manual kneading the amount of cement should be slightly increased.

However, if the decision is made to prepare a solution at the facility, then it is worthwhile to take care in advance of purchasing such equipment in order to save time and effort.

Table of recommendations for the selection of proportions using the available values
  • First you need to prepare the cement. It should be dry and free from lumps. At the same time, it will be the main unit of measurement when calculating the proportion.
  • Two parts of sand are recommended to be added to one part of the cement.. It must first be sifted to get rid of debris and large inclusions. It is not recommended to use sea sand, as it contains salt, which corrodes metal fittings and reduces strength.
The quality of the sand depends on the characteristics of the final product and its choice must be approached thoroughly.
  • Some masters advise using quartz sand with different fractions.to get a good filling and increased density.
  • At the next stage, four parts of rubble are introduced into the mixture.. At the same time, his fraction should not be too large and it is better if there will be a small amount of dropouts in it.
  • All solids are immediately placed in a concrete mixer and turned on so that the components have a homogeneous structure.. This is hard to achieve if the work is done by hand and not using auxiliary equipment.

Tip! Recently, sand-concrete, which is sold as a finished dry mix, has become very popular. It can greatly save time and help get rid of problems with the delivery and storage of sand.

Currently, there is simply a huge amount of various additives to concrete.

Additives

Quite often, additional components are added to the solution, which should give it specific properties. At the same time, their need is governed by the operating conditions and various factors influencing the final product. It is worth noting that the price of some of these compositions is quite high, which affects the final cost of production.

The most commonly used in the work of additives that can withstand the freezing of water in the cold

Also in the solution you can add a plasticizer, which is responsible for the consistency and promotes uniform solidification. Moreover, even if the amount of moisture in the composition is greater than necessary, it will not allow cracks to appear. However, this should not be neglected.

Tip! Each additive has its own characteristics and properties, and therefore, it must be used in strict accordance with the instructions, which are always attached in the kit.

In modern construction, the availability of such additives has become an integral element

Water

Usually the instruction for the preparation of concrete assumes that the water in the solution will be no more than 30%. This is considered optimal, but in practice it may be different.

The simplest manual concrete mixer

Professional masters recommend introducing water into the mixture in small portions with constant stirring. At the same time, they are trying to bring its number to 25% of the total. So the probability of occurrence of cracks and decrease in quality decreases.

After the first batch has turned out, the builders memorize the required amount of liquid, which will be used for this work. So you can save time.

Tip! During operation, it is necessary to maintain temperature conditions for a particular type of cement. If this is not possible, then it is worth using hot water and special additives for concrete mixes.

The finished solution should have a uniform structure and consistency, as well as have the appropriate fluidity class

Conclusion

After reading the video in this article, you can learn more about this process and the required proportions. At the same time, making a conclusion on the basis of the text above, it is worth noting that this work is quite simple and does not require the availability of qualified specialists. That is why most often she is trusted by such workers.

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