No one will argue with the fact that the modern construction industry can not do without cement in any way. Without it, it will not be possible to build a single building, nor will it be possible to pave a single road. Every year, factories producing this remarkable material produce more and more products that diverge instantly.
Every builder knows that to build a house you need a cement-sand mixture, which we will talk about preparing today. Of course, this topic is not too simple, since before starting work it is necessary to acquire at least basic knowledge about existing
cement brands and the features of each of them.
Given that GOST for each of them provides different strength indicators, serial numbers are assigned to all types of cement. The most commonly used brands are 200, 300, as well as all types of 400-600. The larger the number, the more ideal the particular variety is to obtain foundation concrete. Naturally, the cement-sand mixture can be obtained from the "junior" brands.
The most common and commonly used Portland cement. Unfortunately, there are often situations when he cannot satisfy all your requirements. That is why in some cases a sulfate-resistant, hydrophobic or quick-setting type is chosen. However, there are many more specialized varieties that are most often interesting only to professionals.
Types of Solutions
- Oily cement-sand mixture is rarely used, which contains a lot of binder component. It hardens quickly, but not too durable due to the tendency to crack.
- Most often, ordinary cement mortar is used, in which the proportions of all components are ideal. It hardens rather slowly, but its service life is beyond all praise.
- Due to non-compliance with manufacturing technology, beginners often get the so-called lean solution, in which there are almost no binders. Such a mixture does not harden in principle.
Having understood the basic concepts, we will consider some special types of cement mortars and learn about the methods of their preparation.
Kneading Methods
How is the cement-sand mixture prepared ? If you are going to build something more serious than a hut, you should know the answer to this question. In many ways, the preparation process is similar to the technology for producing a lime mortar. A certain proportion is required: cement and sand are taken in a ratio of 1: 3, water is added, after which the mixture is thoroughly mixed. Constantly control the consistency: if the mass is watery, then cement should be added, if “dry”, then water and filler are added.
However, builders practically do not use cement-sand mixture for grouting cracks and joints. GOST for construction requires the use of cement-lime mortar.
Cement-lime mixture
The technology of its manufacture is no different, but instead of water, a "thin" solution of lime is used. Such a composition is not only ideal as a grout for joints, but can also be successfully used as a stucco mixture for walls and even ceilings.
In conclusion, we can say that there is not a single construction site wherever the cement-sand mixture is used. Its price varies greatly depending on the components used and the cement manufacturing company, so here everything is strictly individual.