More and more new materials appear on the construction market, designed to facilitate and accelerate the construction process, to improve its quality. One of such materials is a dry mix - sand concrete.
Features
This recently appeared building mix immediately began to be in high demand, since it is a universal material with excellent characteristics. It consists of cement and a number of additives, so that the prepared solution quickly hardens. If we compare the material with analogues, sand concrete M 300 is significantly ahead of them in a number of indicators. These are:
- High reliability and durability.
- Preservation of its properties for a long time.
- Ability to carry the highest loads.
- Resistance to damage of any kind, including mechanical.
- High density.
- Resistance to moisture, adaptation to rapid changes in temperature.
- Affordable cost for any consumer.
- No shrinkage.
- Water resistant.
- Environmental friendliness.
Scope of application
M300 sand concrete - dry mix. It is particularly practical, versatile. It can be used in all construction fields when working inside and outside of objects. Material is indispensable when it comes to the strength of concrete structures and structures. Construction complexes, residential buildings, facilities for domestic and household use - everywhere this material is used for the preparation of solutions. It is used:
- At installation.
- When pouring the foundations for structures.
- In the manufacture of screed floors.
- When leveling surfaces.
- For sealing cracks.
Due to its resistance to external factors and the speed of hardening, M 300 sand concrete is used when working at emergency facilities where these properties are very important.
Restoration of surfaces of various types, laying of stairs, paths for the garden, the manufacture of various types of paving slabs, borders - these and many other types of work are also carried out today using sand concrete solutions. In addition, M300 sand concrete is used: a dry mixture is the main component for the preparation of expanded clay concrete.
Method of use
But in order for the result to be of high quality, the surface must be carefully prepared before applying the solution. To do this, remove dust, paintwork, dirt, loose areas that may subsequently crumble. If large cracks occur, they must be repaired. Before applying the solution, the surface must be primed or moistened.
If vertical surfaces are machined, the work is performed as follows:
- Beacons are installed. They are needed so that the solution can be leveled to obtain a strictly horizontal surface.
- After that, M300 sand concrete is used. The dry mixture is mixed with liquid at the rate of 1: 5.
- Using a mixer, the solution is mixed until a plastic homogeneous mass is obtained.
- The required amount of solution is poured onto the prepared surface. It should be enough to work comfortably.
- The solution is leveled using the rule.
In order for the solution to retain its properties after drying, the following measures must be observed: periodically moisturize the surface, protect from drafts and ensure that the sun does not fall on the drying solution for at least 72 hours. In a week, the surface will be ready for further work.
Composition
How is sandstone concrete M300 manufactured? A dry mixture is a material that is the result of the use of familiar materials and the introduction of the latest developments and technologies. Particular attention in the manufacture of the material is paid to observing the proportions of the components, otherwise the expected effect is unlikely to be achieved: all the characteristics of the material will change, moreover, such important as water resistance, frost resistance.
The main component of the mixture is one of the new types of cement - Portland cement. It consists of gypsum, to which crushed clinker and sand are added. Special additives such as granite chips, plasticizers, etc. improve the quality of the material.
Types of mixtures
Depending on the components used, the M300 sand concrete mix is divided into the following types according to its properties:
- Coarse mixture. It has a long service life and the highest strength characteristics. Designed for pouring foundation structures.
- A medium-grained mixture. Screeds, paving slabs, self-leveling floors - these and many other works are carried out using precisely medium-fractional mixtures.
- Fine-grained mixture. It has high reliability. It is used as an external plaster, it is used as a solution for removing joints.
To make a certain type of mixture, special nets, special equipment, vibrating installations, various tools are used.